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94-451: In the early 1920s, Philco made storage batteries, "socket power" battery eliminator units (plug-in transformers), and battery chargers. With the invention of the rectifier tube, which made it practical to power radios by electrical outlets, in 1928, Philco entered the radio business. They followed other radio makers such as RCA , Atwater-Kent , Zenith Electronics , Freshman Masterpiece, FADA Radio (Frank A. D'Andrea Radio), and AH Grebe into

188-432: A mass-production basis, which limited them to a number of specialised applications. The MOSFET was invented at Bell Labs between 1955 and 1960. It was the first truly compact transistor that could be miniaturised and mass-produced for a wide range of uses. Its advantages include high scalability , affordability, low power consumption, and high density . It revolutionized the electronics industry , becoming

282-403: A radio antenna , practicable. Vacuum tubes (thermionic valves) were the first active electronic components which controlled current flow by influencing the flow of individual electrons , and enabled the construction of equipment that used current amplification and rectification to give us radio , television , radar , long-distance telephony and much more. The early growth of electronics

376-559: A case, unplug them all, then plug them back in one by one until the culprit or culprits is found. External AC adapters are widely used to power small or portable electronic devices. The advantages include: A survey of consumers showed widespread dissatisfaction with the cost, inconvenience, and wastefulness of the profusion of power adapters used by electronic devices. The issue of inefficiency of some power supplies has become well known, with U.S. president George W. Bush referring in 2001 to such devices as "Energy Vampires". Legislation

470-600: A charger similar in most respects to that of the GSMA/OMTP proposal and to the European Common external power supply . The ITU recommendation was expanded and updated in June, 2011. The hope is to markedly reduce the profusion of non-interchangeable power adapters. The European Union defined a Common external power supply for "hand-held data-enabled mobile phones" ( smartphones ) sold from 2010, intended to replace

564-748: A de facto standard in low-power AC adapters for many portable devices. In addition to serial digital data exchange, the USB standard also provides 5 VDC power , up to 500 mA ( 900 mA over USB 3.0). Numerous accessory gadgets (" USB decorations ") were designed to connect to USB only for DC power and not for data interchange. The USB Implementers Forum in March, 2007 released the USB Battery Charging Specification which defines, "...limits as well as detection, control and reporting mechanisms to permit devices to draw current in excess of

658-475: A fast adder, invented by Bruce Gilchrist , James H. Pomerene and Y.K. Wong of the Institute for Advanced Study . It incorporated a speed-up technique for asynchronous adders reducing the time for additive carry-overs to propagate. In 1959, Philco developed and produced the first battery-powered portable transistorized TV. This TV model was called the "Safari" and contained 21 transistors. Philco had developed

752-595: A few watts to 35 watts of power in that state. The report concluded that about 32 billion kilowatt-hours (kWh) per year, about 1% of total electrical energy consumption, could be saved in the United States by replacing all linear power supplies (average efficiency 40–50%) with advanced switching designs (efficiency 80–90%), by replacing older switching supplies (efficiencies of less than 70%) with advanced designs (efficiency of at least 80%), and by reducing standby consumption of supplies to not more than 1 watt. Since

846-408: A high direct voltage driving a switching circuit, which contains a transformer operating at a high frequency and outputs direct current at the desired voltage. The high-frequency ripple is more easily filtered out than mains-frequency. The high frequency allows the transformer to be small, which reduces its losses; and the switching regulator can be much more efficient than a linear regulator. The result

940-418: A leading role in the field of microwave and high power transmission as well as television receivers until the middle of the 1980s. Since then, solid-state devices have all but completely taken over. Vacuum tubes are still used in some specialist applications such as high power RF amplifiers , cathode-ray tubes , specialist audio equipment, guitar amplifiers and some microwave devices . In April 1955,

1034-474: A miniature transistorized computer brain for the Navy's jet fighter planes in 1955 and it was called the "Transac" (C-1000, C-1100), which had stood for "Transistor Automatic Computer." The Philco Transac computer brain had used its high-frequency surface-barriers transistors in the circuitry design. Chrysler and Philco announced that they had developed and produced the world's first all-transistor car radio and it

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1128-566: A mix of the two types. Analog circuits are becoming less common, as many of their functions are being digitized. Analog circuits use a continuous range of voltage or current for signal processing, as opposed to the discrete levels used in digital circuits. Analog circuits were common throughout an electronic device in the early years in devices such as radio receivers and transmitters. Analog electronic computers were valuable for solving problems with continuous variables until digital processing advanced. As semiconductor technology developed, many of

1222-468: A much more constant voltage than unregulated supplies as the input voltage and the load current vary. When introduced, their prices were high, but by the early 21st century the prices of switch-mode components had dropped to a degree which allowed even cheap supplies to use this technology, saving the cost of a larger and heavier mains-frequency transformer. Some universal adapters automatically set their output voltage and maximum current according to which of

1316-540: A physical space, although in more recent years the trend has been towards electronics lab simulation software , such as CircuitLogix , Multisim , and PSpice . Today's electronics engineers have the ability to design circuits using premanufactured building blocks such as power supplies , semiconductors (i.e. semiconductor devices, such as transistors), and integrated circuits. Electronic design automation software programs include schematic capture programs and printed circuit board design programs. Popular names in

1410-475: A plant owned by Philco-Taiwan. Eventually, all consumer electronic goods would be made by Philco-Taiwan, to lower costs of production and be more competitive in the market. The prevailing industry trend was to move consumer electronic manufacturing to Asia in order to lower the cost of labor and production, and Philco-Ford was no exception to this. Heavy consumer goods (major appliances) such as refrigerators, air conditioners and washer-dryers continued to be built in

1504-587: A range of interchangeable tips is fitted; tips are available to fit and supply appropriate power to many notebook computers and mobile devices. Different tips may use the same connector, but automatically supply different power; it is essential to use the right tip for the apparatus being powered, but no switch needs to be set correctly by the user. The advent of switch-mode power supplies has allowed adapters to work from any AC mains supply from 100 to 240 V with an appropriate plug; operation from standard 12 V DC vehicle and aircraft supplies can also be supported. With

1598-564: A shallow front-to-back depth) picture tube turned out to be unreliable, and cost the company dearly in repairs and reputation. The 1959 model included a console and a table model. Many of them were sold to motels and bars due to the convenience of the swivel tube arrangement. It was discontinued in 1960; a disappointing failure for Philco. Due to the unique design, the Predicta is a collector's favorite and restored examples can easily be found. In late 1953, engineers at Philco Corporation invented

1692-527: A shift towards the micro-USB and mini-USB connectors, which are electrically compatible in function to the original USB connector but physically smaller. In 2012, a USB Power Delivery Specification was proposed to standardize delivery of up to 100 watts, suitable for devices such as laptop computers that usually depend on proprietary adapters. The ITU published Recommendation ITU-T L.1000, "Universal power adapter and charger solution for mobile terminals and other hand-held ICT devices", which specifies

1786-442: A standard for interchangeable laptop power supplies, IEC 62700 (full name "IEC Technical Specification 62700: DC Power supply for notebook computer"), which was published on February 6, 2014. Electronics Electronics is a scientific and engineering discipline that studies and applies the principles of physics to design, create, and operate devices that manipulate electrons and other electrically charged particles . It

1880-432: A tiny mirror attached to the player's needle. A beam of light was focused on the mirror which caused a vibrating light to hit a photoelectric cell and produce the audio signal. While this system had some advantages over the standard crystal phono cartridge of the time, it was unreliable and is today a very difficult unit to restore. In 1941, in response to outside needs for personnel skilled in electronics , Philco founded

1974-639: A training and installation organization that evolved into its TechRep division, with hundreds of personnel styled as Field Engineers or TechReps in positions worldwide. This division later became the foundation for the Ford Aerospace organization. Philco began marketing car radios in 1930 and later expanded into other areas including air conditioners (1938), refrigerators (1939), home freezers (1946), consumer televisions (1947), electric ranges (1949), home laundry washers and dryers (1954), and home entertainment products. Their first consumer television set,

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2068-484: A very wide range of voltages and frequencies; a single 100–240 VAC unit will handle almost any mains supply in the world. Many inexpensive switched-mode AC adapters do not implement adequate filtering and/or shielding for electromagnetic interference that they generate. The nature of these high speed, high-energy switching designs is such that when these preventative measures are not implemented, relatively high energy harmonics can be generated, and radiated, well into

2162-411: A wide line of radios beginning with five-tube sets all the way up to high-fidelity consoles with 20 tubes in 1937–38. Philco also made battery-powered radios which were by then called "farm radios", most of which had cabinets identical to their AC powered versions. The Philco "Baby Grand" (today called "cathedral" radios by collectors) was a shape that featured an arched top that wrapped from the sides over

2256-462: Is a market for replacement adapters. The replacement must match input and output voltages, match or exceed current capability, and be fitted with a matching connector. Many electrical products are poorly labeled with information concerning the power supply they require, so it is prudent to record the specifications of the original power supply in advance, to ease replacement if the original is later lost. Careful labeling of power adapters can also reduce

2350-410: Is a much more efficient, smaller, and lighter device. Safety is ensured, as in the older linear circuit, because a transformer still provides galvanic isolation . A linear circuit must be designed for a specific, narrow range of input voltages (e.g., 220–240 VAC) and must use a transformer appropriate for the frequency (usually 50 or 60 Hz), but a switched-mode supply can work efficiently over

2444-572: Is a subfield of physics and electrical engineering which uses active devices such as transistors , diodes , and integrated circuits to control and amplify the flow of electric current and to convert it from one form to another, such as from alternating current (AC) to direct current (DC) or from analog signals to digital signals. Electronic devices have hugely influenced the development of many aspects of modern society, such as telecommunications , entertainment, education, health care, industry, and security. The main driving force behind

2538-587: Is being enacted in the EU and a number of U.S. states to reduce the level of energy wasted by some of these devices. Such initiatives include standby power and the One Watt Initiative . But others have argued that these inefficient devices are low-powered, e.g., devices that are used for small battery chargers , so even if they have a low efficiency, the amount of energy they waste is less than 1% of household consumption of electric energy. Considering

2632-548: Is defined as unwanted disturbances superposed on a useful signal that tend to obscure its information content. Noise is not the same as signal distortion caused by a circuit. Noise is associated with all electronic circuits. Noise may be electromagnetically or thermally generated, which can be decreased by lowering the operating temperature of the circuit. Other types of noise, such as shot noise cannot be removed as they are due to limitations in physical properties. Many different methods of connecting components have been used over

2726-517: Is often very similar to the design that would be used for a built-in or internal supply. When used with battery -powered equipment, adapters typically charge the battery as well as powering the equipment. Aside from obviating the need for internal power supplies, adapters offer flexibility: a device can draw power from 120 VAC or 230 VAC mains, vehicle battery, or aircraft battery, just by using different adapters . Safety can be another advantage, as hazardous 120 or 240 volt mains power

2820-436: Is released as heat , an inefficient power supply is hot to the touch, as is one that wastes power without an electrical load. This waste heat is itself a problem in warm weather, since it may require additional air conditioning to prevent overheating, and even to remove the unwanted heat from large supplies. External power adapters can fail, or can become separated from the product they are intended to power. Consequently, there

2914-415: Is represented by Newsan SA SANYO and DatandHome SA, with the line of washing machines, dishwashers, air conditioning, water heaters, also the same group. In Chile , the brand belongs to Fuji Corp S.A ., a company that markets speakers, headphones, accessories for audio, TV and telephony, as well as appliances and electrical items, under this brand. In Italy , Philco brand televisions were produced during

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3008-595: Is the voltage comparator which receives a continuous range of voltage but only outputs one of two levels as in a digital circuit. Similarly, an overdriven transistor amplifier can take on the characteristics of a controlled switch , having essentially two levels of output. Analog circuits are still widely used for signal amplification, such as in the entertainment industry, and conditioning signals from analog sensors, such as in industrial measurement and control. Digital circuits are electric circuits based on discrete voltage levels. Digital circuits use Boolean algebra and are

3102-448: Is therefore the process of defining and developing complex electronic devices to satisfy specified requirements of the user. Due to the complex nature of electronics theory, laboratory experimentation is an important part of the development of electronic devices. These experiments are used to test or verify the engineer's design and detect errors. Historically, electronics labs have consisted of electronics devices and equipment located in

3196-422: Is transformed to a lower, safer voltage at the wall outlet before going into the appliance handled by the user. Originally, most AC/DC adapters were linear power supplies , containing a transformer to convert the mains electricity voltage to a lower voltage, a rectifier to convert it to pulsating DC , and a filter to smooth the pulsating waveform to DC, with residual ripple variations small enough to leave

3290-553: The Courier 1B , built by Philco, became the first active repeater satellite. Courier 1B was built by the Western Development Labs (WDL) division of Philco, previously known as "Army Fort Monmouth Laboratories" ( Fort Monmouth ). In 1960, NASA contracted with Philco to build the worldwide tracking station network for Project Mercury , and all subsequent man-in-space space projects until the ground station network

3384-623: The Edward S. Rogers, Sr. company in 1925 as a complement to his line of "battery less" radio receivers . Another early producer of battery eliminators was the Galvin Manufacturing Corporation (later known as Motorola ), which was opened on September 25, 1928 by Paul Galvin and his brother Joseph E. Galvin. In early laptop computers, the power supply units were internal like in desktop computers . To facilitate portability by sparing physical space and reducing

3478-624: The IBM 608 was the first IBM product to use transistor circuits without any vacuum tubes and is believed to be the first all-transistorized calculator to be manufactured for the commercial market. The 608 contained more than 3,000 germanium transistors. Thomas J. Watson Jr. ordered all future IBM products to use transistors in their design. From that time on transistors were almost exclusively used for computer logic circuits and peripheral devices. However, early junction transistors were relatively bulky devices that were difficult to manufacture on

3572-644: The National Security Agency and the United States Navy entered into a contract with Philco to build a specialized scientific transistorized computer based on Philco's surface barrier transistor technology. The project was called SOLO, since the idea was to have powerful personal workstations, and the computer was later commercially named the Philco Transac S-1000. The SOLO transistorized large scale scientific computer

3666-459: The electron in 1897 by Sir Joseph John Thomson , along with the subsequent invention of the vacuum tube which could amplify and rectify small electrical signals , inaugurated the field of electronics and the electron age. Practical applications started with the invention of the diode by Ambrose Fleming and the triode by Lee De Forest in the early 1900s, which made the detection of small electrical voltages, such as radio signals from

3760-576: The surface-barrier transistor , the first high frequency transistor suitable for use in high speed computers. Philco Corporation had produced a late 1950s production film about its surface-barrier transistor manufacturing processes and product developments that was titled, " Philco Transistors - The Tiny Giants Of The Future " [1] . A May 1954 news article describes Philco's development of a pre-production indium-coated transistor that used silicon instead of germanium that relied on further improvements in silicon refinement to bring to production. In June 1955,

3854-407: The 1929 model year, Philco was in third place behind Atwater Kent and Majestic (Grigsby-Grunow Corp) in radio sales. In 1930, the company sold 600,000 radios, grossed $ 34 million, and was the leading radio maker in the country. By 1934, they had captured 30% of the domestic radio market. Philco radios were economical without sacrificing quality or durability. Like other makers of the era, they offered

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3948-704: The 1930s, continued to provide Ford with car and truck radio receivers; consumer product investments were also made to color television production. Along with color and black and white television, Philco continued to produce refrigerators, washers, dryers, air conditioners, stoves, radios, portable transistor radios, portable phonographs, audio console systems with high quality "Mastercraft" furniture cabinets, and component stereo systems. The company branded Philco products as "Philco-Ford" in 1966, and console stereo systems reached their zenith during 1966 and 1967, with high quality cabinet construction and powerful stereo chassis systems of 100- and 300-watt consoles. Philco at one time

4042-428: The 1948 table Model 48-1000, had a 10 in (25 cm) black-and-white screen and sold for US$ 395 ($ 4,482 in 2023). By 1954, Philco had led the radio industry in sales volume for 24 straight years, selling over 30 million radios. Philco was also a pioneer in television broadcasting, launching Philadelphia experimental station W3XE in 1932. In 1941, the station became the third commercially licensed TV operation in

4136-499: The 1956 season ended, Philco discontinued the all-transistor portable 45rpm phonograph models, for transistors were too expensive compared to vacuum tubes. The Philco Transac models S-1000 scientific computer and S-2000 electronic data processing computer, were the first commercially produced large-scale all transistor computers, which were introduced in 1957. It used discrete surface barrier transistors instead of vacuum tubes (the integrated circuit had not yet been invented). It also used

4230-448: The 1960s, U.S. manufacturers were unable to compete with Japanese companies such as Sony and Hitachi who could produce high-quality goods at lower prices. By the 1980s, however, U.S. manufacturers became the world leaders in semiconductor development and assembly. However, during the 1990s and subsequently, the industry shifted overwhelmingly to East Asia (a process begun with the initial movement of microchip mass-production there in

4324-475: The 1970s), as plentiful, cheap labor, and increasing technological sophistication, became widely available there. Over three decades, the United States' global share of semiconductor manufacturing capacity fell, from 37% in 1990, to 12% in 2022. America's pre-eminent semiconductor manufacturer, Intel Corporation , fell far behind its subcontractor Taiwan Semiconductor Manufacturing Company (TSMC) in manufacturing technology. By that time, Taiwan had become

4418-474: The 1980s by Imperial Electronics of Milan . Battery eliminator An AC adapter or AC/DC adapter (also called a wall charger , power adapter , power brick , or wall wart ) is a type of external power supply , often enclosed in a case similar to an AC plug . AC adapters deliver electric power to devices that lack internal components to draw voltage and power from mains power themselves. The internal circuitry of an external power supply

4512-712: The EDA software world are NI Multisim, Cadence ( ORCAD ), EAGLE PCB and Schematic, Mentor (PADS PCB and LOGIC Schematic), Altium (Protel), LabCentre Electronics (Proteus), gEDA , KiCad and many others. Heat generated by electronic circuitry must be dissipated to prevent immediate failure and improve long term reliability. Heat dissipation is mostly achieved by passive conduction/convection. Means to achieve greater dissipation include heat sinks and fans for air cooling, and other forms of computer cooling such as water cooling . These techniques use convection , conduction , and radiation of heat energy . Electronic noise

4606-835: The Johnson Space Center have been preserved and will be restored to their Apollo-era configuration for historical purposes. The control room is listed in the National Register of Historic Places as the "Apollo Mission Control Center". In 1971, Philco-Ford began to sell reverse osmosis -based water purification systems that used tube-shaped membranes developed by the company to filter and desalinate raw polluted water for municipal utilities and manufacturing. On December 11, 1961, Ford Motor Company purchased Philco and continued to offer consumer products, computer systems and defense related projects. The company, which had supplied Ford with some of its car radios as early as

4700-524: The Philadelphia Storage Battery Company, in 1906 it began making batteries for electric vehicles . They later supplied home charging batteries to the infant radio industry. The Philco brand name appeared in 1919. From 1920 to 1927, all radios were powered by storage batteries which were fairly expensive and often messy in the home. A very successful August 1925 consumer product, called the "Socket Power Battery Eliminator",

4794-423: The USB 2.0 specification for charging ...". Electric fans, lamps, alarms, coffee warmers, battery chargers, and even toys have been designed to tap power from a USB connector. Plug-in adapters equipped with USB receptacles are widely available to convert 120 VAC or 240 VAC power or 12 VDC automotive power to 5 VDC USB power (see photo at right). The trend towards more-compact electronic devices has driven

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4888-520: The United States as WPTZ. It was sold to Westinghouse Broadcasting in 1953 and became KYW-TV , a CBS owned and operated station. The Philco Predicta TV set was introduced in 1957 for the 1958 model year. It was a black-and-white television with the picture tube mounted in a unique steerable pod on a pedestal. There were many versions: 17" or 21" picture tubes, wood or metal cabinets and table or floor standing versions, some with rare UHF tuners. Its specially designed, high-deflection-angle (to achieve

4982-490: The United States, along with television receivers. Ford dropped the computer business a few years into its ownership of the company. In 1973, a complete line of breakthrough refrigerators was introduced, consisting of eight side-by-side "Cold Guard" models, which used about one-third less electricity than comparable competitive makes. But by January 1974, Ford was eager to rid itself of the home products in Philco's lines, which

5076-792: The VHF micro-alloy diffused transistor (MADT) and used them in the Safari portable TV. The retail selling price was $ 250.00 ($ 2,613 in 2023) plus the cost of the rechargeable battery, which was $ 5.25 extra ($ 55.00 in 2023). In 1962, the Philco 2000 Model 212 computer was chosen for use in the North American Aerospace Defense Command 's famous Cheyenne Mountain Complex . Three of them were installed that year and ran until 1980. They were also used by research labs at Westinghouse Electric and General Electric . In 1960,

5170-535: The advancement of electronics is the semiconductor industry , which in response to global demand continually produces ever-more sophisticated electronic devices and circuits. The semiconductor industry is one of the largest and most profitable sectors in the global economy, with annual revenues exceeding $ 481 billion in 2018. The electronics industry also encompasses other sectors that rely on electronic devices and systems, such as e-commerce, which generated over $ 29 trillion in online sales in 2017. The identification of

5264-490: The appropriate adapter, accessories, and tips, a variety of equipment can be powered from almost any source of power. A "Green Plug" system has been proposed, based on USB technology, by which the consuming device would tell the external power supply what kind of power is needed. A battery eliminator is an adapter intended to allow a device intended for battery operation, such as a radio, to be operated from an AC outlet. Early commercial battery eliminators were produced by

5358-409: The basis of all digital computers and microprocessor devices. They range from simple logic gates to large integrated circuits, employing millions of such gates. Digital circuits use a binary system with two voltage levels labelled "0" and "1" to indicated logical status. Often logic "0" will be a lower voltage and referred to as "Low" while logic "1" is referred to as "High". However, some systems use

5452-470: The battery-powered radio business. By the end of 1930, they were selling more radios than any other maker, a position they held for more than 20 years. Philco built many iconic radios and television sets , including the classic cathedral -shaped wooden radio of the 1930s (aka the "Baby Grand"), and the Predicta series of television receiver sets of the 1950s. Philo Farnsworth , credited for inventing

5546-531: The brand to a group of investors, who intended to license the brand to Brazilian appliance maker Britânia. In 2003, the Merloni Group acquired rights to the Philco brand (from Philco International) for use in Italy . The Italian Philco produces household appliances in affiliation with ex- Bendix Corporation and Thorn EMI Moyor Electronics (e.g. Bendix 71258 1000 automatic washing machine 1986). As of 2006,

5640-459: The circuit, thus slowing the computer. The invention of the integrated circuit by Jack Kilby and Robert Noyce solved this problem by making all the components and the chip out of the same block (monolith) of semiconductor material. The circuits could be made smaller, and the manufacturing process could be automated. This led to the idea of integrating all components on a single-crystal silicon wafer, which led to small-scale integration (SSI) in

5734-523: The company is mainly known in Australia . In Argentina , in March 2004, Philco was acquired by a group of Argentine investors. The presence of Philco in Argentina dates from 1930 and remains a traditional mark of appliances in this country. It manufactures refrigerators by Helametal Catamarca S.A. (Philco Argentina). All the line electronics, LCD TV, Car Stereos, Air Conditioning, MWO, Audio & DVD,

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5828-626: The consoles used in both Mission Operations Control Rooms (a.k.a. Mission Control) at Building 30 of NASA's Lyndon B. Johnson Space Center in Houston, Texas. Philco technical representatives worked with NASA staff to design and integrate the consoles with NASA hardware and systems. The consoles were used for the Gemini , Apollo , Skylab , and Space Shuttle missions until 1998. The Philco-designed and installed consoles in Mission Control 2 at

5922-874: The early 1960s, and then medium-scale integration (MSI) in the late 1960s, followed by VLSI . In 2008, billion-transistor processors became commercially available. An electronic component is any component in an electronic system either active or passive. Components are connected together, usually by being soldered to a printed circuit board (PCB), to create an electronic circuit with a particular function. Components may be packaged singly, or in more complex groups as integrated circuits . Passive electronic components are capacitors , inductors , resistors , whilst active components are such as semiconductor devices; transistors and thyristors , which control current flow at electron level. Electronic circuit functions can be divided into two function groups: analog and digital. A particular device may consist of circuitry that has either or

6016-452: The electronic logic gates to generate binary states. Highly integrated devices: Electronic systems design deals with the multi-disciplinary design issues of complex electronic devices and systems, such as mobile phones and computers . The subject covers a broad spectrum, from the design and development of an electronic system ( new product development ) to assuring its proper function, service life and disposal . Electronic systems design

6110-758: The first all-transistor phonograph models TPA-1 and TPA-2. This was announced in the June 28, 1955, edition of the Wall Street Journal . Philco had begun selling these phonographs in the fall of 1955 for $ 59.95 ($ 682.00 in 2023). The October 1955 issue of Radio & Television News magazine (page 41) printed a full-page, detailed article, on Philco's new consumer phonograph. The Philco all-transistor portable phonograph TPA-1 and TPA-2 models played only 45rpm records and used four 1.5v "D" batteries for its power supply. "TPA" stands for "Transistor Phonograph Amplifier". Its circuitry used three Philco germanium PNP alloy-fused junction audio frequency transistors. After

6204-418: The first fully functional all electronic television system ( U.S. patent 1,773,980 , filed Jan 7, 1927), worked at Philco from 1931 to 1933. Philco was founded in 1892 as Helios Electric Company. From its inception until 1904, the company manufactured carbon-arc lamps . As this line of business slowly floundered over the last decade of the 19th century, the firm experienced increasingly difficult times. As

6298-562: The following ways: The electronics industry consists of various sectors. The central driving force behind the entire electronics industry is the semiconductor industry sector, which has annual sales of over $ 481 billion as of 2018. The largest industry sector is e-commerce , which generated over $ 29 trillion in 2017. The most widely manufactured electronic device is the metal-oxide-semiconductor field-effect transistor (MOSFET), with an estimated 13   sextillion MOSFETs having been manufactured between 1960 and 2018. In

6392-489: The functions of analog circuits were taken over by digital circuits, and modern circuits that are entirely analog are less common; their functions being replaced by hybrid approach which, for instance, uses analog circuits at the front end of a device receiving an analog signal, and then use digital processing using microprocessor techniques thereafter. Sometimes it may be difficult to classify some circuits that have elements of both linear and non-linear operation. An example

6486-404: The gigahertz range can be degraded if the receiving antennae are very close to a radiating AC adapter. A determination of if interference is coming from a specific AC adapter can be made simply by unplugging the suspect adapter while observing the amount of interference received in the problem radio band. In a modern household or business environment, there may be multiple AC adapters in use; in such

6580-736: The likelihood of a mixup which could cause equipment damage. Some "universal" replacement power supplies allow output voltage and polarity to be switched to match a range of equipment. With the advent of switch-mode supplies, adapters which can work with any voltage from 110 VAC to 240 VAC became widely available; previously either 100–120 VAC or 200–240 VAC versions were used. Adapters which can also be used with motor vehicle and aircraft power (see EmPower ) are available. Four-way X connectors or six-way star connectors , also known as spider connectors , with multiple plug sizes and types are common on generic power supplies. Other replacement power supplies have arrangements for changing

6674-532: The many incompatible proprietary power supplies and eliminate waste by reducing the total number of supplies manufactured. Conformant supplies deliver 5 VDC via a micro-USB connector, with preferred input voltage handled ranging from 90 to 264 VAC. In 2006 Larry Page , a founder of Google , proposed a 12 V and up to 15 A standard for almost all equipment requiring an external converter, with new buildings fitted with 12 VDC wiring, making external AC-to-DC adapter circuitry unnecessary. IEC has created

6768-399: The most widely used electronic device in the world. The MOSFET is the basic element in most modern electronic equipment. As the complexity of circuits grew, problems arose. One problem was the size of the circuit. A complex circuit like a computer was dependent on speed. If the components were large, the wires interconnecting them must be long. The electric signals took time to go through

6862-586: The name for private brands and retro-style consumer electronics. Philips also licensed the Philco brand name to Funai for digital converter boxes for analog TVs in the USA. As of September 2019, the US website is no longer functioning. In Brazil , Philco (then Philco-Hitachi ) was acquired in 1989 by Itautec , becoming Itautec-Philco and in August 2005 Itautec sold Philco to Gradiente . In August 2007, Gradiente sold

6956-464: The nation in production volume. Up to that time most radios were handmade and priced for relatively wealthy consumers. Atwater Kent, the leading radio seller, coincidentally was also located in Philadelphia. The Philadelphia Storage Battery Company decided that prices of radios could be scaled for a mass market by incorporating assembly line techniques then only used by the automobile industry. By

7050-481: The nominal "name plate" voltage, which could damage the load. If they are heavily loaded, the output voltage may droop appreciably, in some cases well below the nominal label voltage even within the nominal rated current, causing the equipment being supplied to malfunction or be damaged. Supplies with linear (as against switched) regulators are heavy, bulky, and expensive. Modern switched-mode power supplies (SMPSs) are smaller, lighter, and more efficient. They put out

7144-403: The one-tube "Mystery Control", used on their 13-tube model 116RX-SU (or 39-116). This feature was not offered by any other maker until the 1970s stereo receivers. Philco ranked 57th among United States corporations in the value of World War II military production contracts. Another interesting product was the Philco "Beam of Light" 78 RPM record players offered in 1941 and 1942. These units had

7238-585: The power connector, with four to nine different alternatives available when purchased in a set. This allows many different configurations of AC adapters to be put together, without requiring soldering. Philmore and other competing brands offer similar AC adapters with interchangeable connectors. The label on a power supply may not be a reliable guide to the actual voltage it supplies under varying conditions. Many low-cost power supplies are " unregulated ", in that their voltage can change considerably with load. If they are lightly loaded, they may put out much more than

7332-423: The powered device unaffected. Size and weight of the device was largely determined by the transformer, which in turn was determined by the power output and mains frequency . Ratings over a few watts made the devices too large and heavy to be physically supported by a wall outlet. The output voltage of these adapters varied with load; for equipment requiring a more stable voltage, linear voltage regulator circuitry

7426-477: The radio portion of the spectrum. The amount of RF energy typically decreases with frequency; so, for instance, interference in the medium wave (US AM) broadcast band in the one megahertz region may be strong, while interference with the FM broadcast band around 100 megahertz may be considerably less. Distance is a factor; the closer the interference is to a radio receiver, the more intense it will be. Even WiFi reception in

7520-518: The report was published, SMPSs have indeed replaced linear supplies to a great extent, even in wall warts. The 2002 report estimated that 6% of electrical energy used in the U.S. "flows through" power supplies (not counting only the wall warts). The website where the report was published said in 2010 that despite the spread of SMPSs, "today's power supplies consume at least 2% of all U.S. electricity production. More efficient power supply designs could cut that usage in half". Since wasted electrical energy

7614-540: The reverse definition ("0" is "High") or are current based. Quite often the logic designer may reverse these definitions from one circuit to the next as they see fit to facilitate their design. The definition of the levels as "0" or "1" is arbitrary. Ternary (with three states) logic has been studied, and some prototype computers made, but have not gained any significant practical acceptance. Universally, Computers and Digital signal processors are constructed with digital circuits using Transistors such as MOSFETs in

7708-520: The top. This was for economic reason partly, as one piece of wood formed both the top and sides. Philco sold far more of this style than any other maker, a total of over two million (in over twenty models, with from four to eleven tubes) from 1930 to 1938; many of them exist today in collections. By today's standards, most are still excellent performing AM band radios when restored. A few of their innovations were very futuristic. From 1939 to 1941, they sold radios that were operated by wireless remote control,

7802-693: The total efficiency of power supplies for small electronic equipment, the older mains-frequency linear transformer-based power supply was found in a 2002 report to have efficiencies from 20 to 75%, and have considerable energy loss even when powered up but not supplying power. Switched-mode power supplies (SMPSs) are much more efficient; a good design can be 80–90% efficient, and is also much smaller and lighter. In 2002 most external plug-in "wall wart" power adapters commonly used for low-power consumer electronics devices were of linear design, as well as supplies built into some equipment. External supplies are usually left plugged in even when not in use, and consume from

7896-417: The weight, power supply units were externalized. When a laptop computer is operated while recharging, the integrated circuitry which controls the charging makes use of a power supply unit's remaining electrical current capacity. This allows supplying the device's components with power during usage while maintaining an uncompromised constant charging speed. The USB connector (and voltage) has emerged as

7990-762: The years. For instance, early electronics often used point to point wiring with components attached to wooden breadboards to construct circuits. Cordwood construction and wire wrap were other methods used. Most modern day electronics now use printed circuit boards made of materials such as FR4 , or the cheaper (and less hard-wearing) Synthetic Resin Bonded Paper ( SRBP , also known as Paxoline/Paxolin (trade marks) and FR2) – characterised by its brown colour. Health and environmental concerns associated with electronics assembly have gained increased attention in recent years, especially for products destined to go to European markets. Electrical components are generally mounted in

8084-476: Was a rectifier unit which enabled users to operate their battery-powered radios from standard light or wall sockets. By 1927, over a million of these units had been sold, but the invention of the vacuum tube rectifier (incorporated into the coming 1928 line of radio sets) made this technology obsolete. In 1926, Philco decided to begin making radios. The first Philco radios were introduced in mid-1928, and 96,000 were produced that year, making Philco radios 26th in

8178-413: Was added. Losses in the transformer and the linear regulator were considerable; efficiency was relatively low, and significant power dissipated as heat even when not driving a load. Early in the twenty-first century, switched-mode power supplies (SMPSs) became almost ubiquitous for this purpose due to their compact size and light weight relative to their power output ability. Mains voltage is rectified to

8272-731: Was announced in the April 28, 1955, edition of the Wall Street Journal . Chrysler made the all-transistor car radio, Mopar model 914HR, available in Fall 1955 for its new line of 1956 Chrysler and Imperial cars, as a $ 150 option ($ 1,706 in 2023). Philco's radio manufacturing plant in Sandusky, Ohio, had produced the all-transistor car radio unit for the Chrysler Corporation, which also used Philco's surface-barrier transistors in its circuitry design. In 1955, Philco developed and produced

8366-575: Was bought by AB Electrolux .) The company (as well as the Sylvania brand name) was acquired from GTE by Philips in 1981 so that Philips could use its trademark in the United States . Philco had been able to keep Philips from using its trademark because of the similar-sounding names, so Philips had sold its products in the United States under the name " Norelco ". Philips later used the Philco name for promotional consumer electronics and licensed

8460-724: Was finally built and delivered to the National Security Agency in November 1957. Philco also entered into a contract with the U.S. Navy's David Taylor Basin Research Division in 1955, to build a larger scale fully transistorized computer using its surface-barrier transistor technology, which was named the CPXQ model and later became the Philco Transac S-2000. Philco had developed and produced

8554-538: Was not doing well. Negotiations with appliance maker White Consolidated Industries (WCI) started in January, but were called off in March. By September, Ford and GTE Sylvania – Philco's largest competitor – announced the sale of the non-automotive parts of the business, with the exception of the new refrigerator range, which Ford also kept. The deal closed on December 11. In 1977, GTE sold Philco International to earlier suitor White Consolidated Industries. (In 1986, WCI

8648-408: Was one of the largest furniture producers in the world, but the end was near for "high quality" furniture cabinets along with stereo equipment. Solid wood cabinets with veneers were replaced with cheaper wood composites covered in vinyl paper and plastic wood pieces. The quality electronic systems that had been built in the United States were replaced with new designs and systems, engineered and built at

8742-473: Was rapid, and by the 1920s, commercial radio broadcasting and telecommunications were becoming widespread and electronic amplifiers were being used in such diverse applications as long-distance telephony and the music recording industry. The next big technological step took several decades to appear, when the first working point-contact transistor was invented by John Bardeen and Walter Houser Brattain at Bell Labs in 1947. However, vacuum tubes played

8836-460: Was replaced by the TDRS communication satellites in the 1990s. Philco's Western Development Labs ultimately became Space Systems/Loral , which continues to manufacture spacecraft. In later years, the company produced automotive electronic controls, aerospace tracking systems, and artificial satellites. In 1963, Philco was also responsible for the design, manufacturing, installation, and service of all

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