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93-531: The company was formed in 2020 by a merger of equals between the aerospace subsidiaries of United Technologies Corporation (UTC) and the Raytheon Company . Before the merger, UTC spun off its non-aerospace subsidiaries Otis Elevator Company and Carrier Corporation . UTC is the nominal survivor of the merger but it changed its name to Raytheon Technologies and moved its headquarters to Waltham, Massachusetts. Former UTC CEO and chairman Gregory J. Hayes

186-501: A field-effect transistor , or may have two kinds of charge carriers in bipolar junction transistor devices. Compared with the vacuum tube , transistors are generally smaller and require less power to operate. Certain vacuum tubes have advantages over transistors at very high operating frequencies or high operating voltages, such as Traveling-wave tubes and Gyrotrons . Many types of transistors are made to standardized specifications by multiple manufacturers. The thermionic triode ,

279-532: A p-n-p transistor symbol, the arrow " P oints i N P roudly". However, this does not apply to MOSFET-based transistor symbols as the arrow is typically reversed (i.e. the arrow for the n-p-n points inside). The field-effect transistor , sometimes called a unipolar transistor , uses either electrons (in n-channel FET ) or holes (in p-channel FET ) for conduction. The four terminals of the FET are named source , gate , drain , and body ( substrate ). On most FETs,

372-476: A vacuum tube invented in 1907, enabled amplified radio technology and long-distance telephony . The triode, however, was a fragile device that consumed a substantial amount of power. In 1909, physicist William Eccles discovered the crystal diode oscillator . Physicist Julius Edgar Lilienfeld filed a patent for a field-effect transistor (FET) in Canada in 1925, intended as a solid-state replacement for

465-712: A $ 5.6 billion deal to upgrade its Patriot missile-defence shield, and in 2017, Saudi Arabia signed business deals worth billions of dollars with multiple American companies, including Raytheon. In February 2020, Raytheon completed the first radar antenna array for the US Army's new missile defense radar, known as the Lower Tier Air and Missile Defense Sensor (LTAMDS), to replace the service's Patriot air and missile defense system sensor. In 1929, William Boeing 's Boeing Airplane & Transport Corporation teamed up with Frederick Rentschler 's Pratt & Whitney to form

558-699: A component of the Dow Jones Industrial Average on March 4, 1939, when United Aircraft and AT&T were added to replace Nash Motors and International Business Machines . The company and its successors remained a component of the Dow Jones Industrial Average through August 2020. It was announced that starting August 31, 2020, Raytheon Technologies would be substituted in the Dow Jones Industrial Average by Honeywell International . During World War II, United Aircraft ranked sixth among United States corporations in

651-474: A contract to build 3DELRR, a next-generation long-range radar system, for the US Air Force worth an estimated $ 1 billion. The contract award involved the construction of next-generation radar that can track aircraft, missiles, and remotely piloted aircraft. It was immediately protested by Raytheon's competitors. After re-evaluating the bids following the protests, the US Air Force decided to delay awarding

744-578: A device had been built. In 1934, inventor Oskar Heil patented a similar device in Europe. From November 17 to December 23, 1947, John Bardeen and Walter Brattain at AT&T 's Bell Labs in Murray Hill, New Jersey , performed experiments and observed that when two gold point contacts were applied to a crystal of germanium , a signal was produced with the output power greater than the input. Solid State Physics Group leader William Shockley saw

837-600: A few hundred milliwatts, but power and audio fidelity gradually increased as better transistors became available and amplifier architecture evolved. Modern transistor audio amplifiers of up to a few hundred watts are common and relatively inexpensive. Before transistors were developed, vacuum (electron) tubes (or in the UK "thermionic valves" or just "valves") were the main active components in electronic equipment. The key advantages that have allowed transistors to replace vacuum tubes in most applications are Transistors may have

930-425: A field-effect transistor (FET) by trying to modulate the conductivity of a semiconductor, but was unsuccessful, mainly due to problems with the surface states , the dangling bond , and the germanium and copper compound materials. Trying to understand the mysterious reasons behind this failure led them instead to invent the bipolar point-contact and junction transistors . In 1948, the point-contact transistor

1023-466: A move to support UTC's Fire & Security unit . In September 2011, UTC acquired an $ 18.4 billion deal (including $ 1.9 billion in net debt assumed) for aircraft components maker Goodrich Corporation . In July 2012, United Technologies acquired Goodrich and merged it with Hamilton Sundstrand , forming UTC Aerospace Systems . In November 2018, UTC acquired Rockwell Collins for $ 23 billion ($ 30 billion including Rockwell Collins' net debt). As part of

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1116-412: A particular type, varies depending on the collector current. In the example of a light-switch circuit, as shown, the resistor is chosen to provide enough base current to ensure the transistor is saturated. The base resistor value is calculated from the supply voltage, transistor C-E junction voltage drop, collector current, and amplification factor beta. The common-emitter amplifier is designed so that

1209-411: A provider of security operations centers, managed security service solutions and cybersecurity professional services, for $ 62 million. In January 2016, Raytheon|Websense acquired the firewall provider Stonesoft from Intel Security for an undisclosed amount and renamed itself to Forcepoint. In July 2016, Poland's Defence Minister Antoni Macierewicz planned to sign a letter of intent with Raytheon for

1302-561: A sharp increase in interim sales and profits. On June 7, 2022, the company announced plans to move its global headquarters to Arlington, Virginia . The move was completed in July. In January 2023, Raytheon Technologies announced it would combine its missiles and defense division and intelligence and space division into a single business unit, effective July 1. The reorganization created three divisions at Raytheon Technologies: Collins Aerospace, Pratt & Whitney, and Raytheon. The reorganization

1395-467: A silicon MOS transistor in 1959 and successfully demonstrated a working MOS device with their Bell Labs team in 1960. Their team included E. E. LaBate and E. I. Povilonis who fabricated the device; M. O. Thurston, L. A. D’Asaro, and J. R. Ligenza who developed the diffusion processes, and H. K. Gummel and R. Lindner who characterized the device. With its high scalability , much lower power consumption, and higher density than bipolar junction transistors,

1488-605: A small change in voltage ( V in ) changes the small current through the base of the transistor whose current amplification combined with the properties of the circuit means that small swings in V in produce large changes in V out . Various configurations of single transistor amplifiers are possible, with some providing current gain, some voltage gain, and some both. From mobile phones to televisions , vast numbers of products include amplifiers for sound reproduction , radio transmission , and signal processing . The first discrete-transistor audio amplifiers barely supplied

1581-434: A transistor can amplify a signal. Some transistors are packaged individually, but many more in miniature form are found embedded in integrated circuits . Because transistors are the key active components in practically all modern electronics , many people consider them one of the 20th century's greatest inventions. Physicist Julius Edgar Lilienfeld proposed the concept of a field-effect transistor (FET) in 1926, but it

1674-600: A type of radio-receiver power supply that plugged into the power grid in place of large batteries . This made it possible to convert household alternating current to direct current for radios and thus eliminate the need for expensive, short-lived batteries. In 1925, the company changed its name to Raytheon Manufacturing Company and began marketing its rectifier under the Raytheon brand name, with commercial success. In 1928, Raytheon merged with Q.R.S. Company, an American manufacturer of electron tubes and switches, to form

1767-440: A type of 3D non-planar multi-gate MOSFET, originated from the research of Digh Hisamoto and his team at Hitachi Central Research Laboratory in 1989. Because transistors are the key active components in practically all modern electronics , many people consider them one of the 20th century's greatest inventions. The invention of the first transistor at Bell Labs was named an IEEE Milestone in 2009. Other Milestones include

1860-416: A weaker input signal, acting as an amplifier . It can also be used as an electrically controlled switch , where the amount of current is determined by other circuit elements. There are two types of transistors, with slight differences in how they are used: The top image in this section represents a typical bipolar transistor in a circuit. A charge flows between emitter and collector terminals depending on

1953-461: A working bipolar NPN junction amplifying germanium transistor. Bell announced the discovery of this new "sandwich" transistor in a press release on July 4, 1951. The first high-frequency transistor was the surface-barrier germanium transistor developed by Philco in 1953, capable of operating at frequencies up to 60 MHz . They were made by etching depressions into an n-type germanium base from both sides with jets of indium(III) sulfate until it

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2046-467: Is chairman and CEO of the combined company, which changed its name to RTX in July 2023. The company has three subsidiaries: Collins Aerospace , Pratt & Whitney , and Raytheon (formerly Raytheon Intelligence & Space and Raytheon Missiles & Defense ). The Raytheon Company was founded in 1922 in Cambridge, Massachusetts , by Laurence K. Marshall, Vannevar Bush , and Charles G. Smith as

2139-551: Is moving manufacturing to Mexico: "The best way to stay competitive and protect the business for long-term is to move production from our facility in Indianapolis to Monterrey, Mexico. " In December, Carrier agreed to keep the Indianapolis plant open, keeping 700 jobs in Indianapolis. The plant in Huntington, Indiana would still close their doors, leaving 700 employees jobless. In June 2019, United Technologies announced

2232-481: Is not observed in modern devices, for example, at the 65 nm technology node. For low noise at narrow bandwidth , the higher input resistance of the FET is advantageous. FETs are divided into two families: junction FET ( JFET ) and insulated gate FET (IGFET). The IGFET is more commonly known as a metal–oxide–semiconductor FET ( MOSFET ), reflecting its original construction from layers of metal (the gate), oxide (the insulation), and semiconductor. Unlike IGFETs,

2325-421: Is often easier and cheaper to use a standard microcontroller and write a computer program to carry out a control function than to design an equivalent mechanical system. A transistor can use a small signal applied between one pair of its terminals to control a much larger signal at another pair of terminals, a property called gain . It can produce a stronger output signal, a voltage or current, proportional to

2418-407: Is one of the basic building blocks of modern electronics . It is composed of semiconductor material , usually with at least three terminals for connection to an electronic circuit . A voltage or current applied to one pair of the transistor's terminals controls the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power,

2511-493: The American Appliance Company . Its focus, which was originally on new refrigeration technology, soon shifted to electronics . The company's first product was a gaseous ( helium ) rectifier that was based on Charles Smith's earlier astronomical research of the star Zeta Puppis . The electron tube was christened with the name Raytheon ("light of/from the gods") and was used in a battery eliminator ,

2604-527: The CK722 , priced for and marketed to hobbyists. Under the direction of Thomas L. Phillips in 1965, it acquired Amana Refrigeration , Inc., a manufacturer of refrigerators and air conditioners . Using the Amana brand name and its distribution channels, Raytheon began selling the first countertop household microwave oven in 1967 and became a dominant manufacturer in the microwave oven business. In 1991, during

2697-709: The China Friendship Foundation for Peace and Development , a united front organization under the control of the Chinese People's Association for Friendship with Foreign Countries . Researchers at the University of Massachusetts Amherst have identified UTC. as the 38th-largest corporate producer of air pollution in the United States as of 2008. UTC released roughly 110,000 pounds (50,000 kg) of toxic chemicals annually into

2790-770: The Elmira-Corning Regional Airport in Big Flats, New York . In March 2008, UTC made a $ 2.63 billion bid to acquire Diebold , a Canton, Ohio based manufacturer of banking and voting machines. Diebold rejected the buyout bid as inadequate. In April 2010, UTC announced that it was investing €15 million ($ 20 million) to set up the United Technologies Research Centre Ireland at University College Cork ’s Tyndall National Institute which will carry out research on energy and security systems. In June 2012, it

2883-636: The Persian Gulf War , Raytheon's Patriot missile received great international exposure. It was credited for downing Iraqi Scud missiles . The exposure resulted in a substantial increase in sales for the company outside the United States. By 2006, Raytheon reported $ 283.9 million in global revenues for its Patriot missile system. In an effort to establish leadership in the defense electronics business, Raytheon purchased in quick succession Dallas-based E-Systems (1995); Chrysler Corporation 's defense electronics and aircraft-modification businesses, and

RTX Corporation - Misplaced Pages Continue

2976-588: The Pratt & Whitney JT9D for the Boeing 747 . In 1974, Harry Jack Gray left Litton Industries to become the CEO of United Aircraft. He pursued a strategy of growth and diversification, changing the parent corporation's name to United Technologies Corporation (UTC) in 1975 to reflect the intent to diversify into numerous high tech fields beyond aerospace. (The change became official on May 1, 1975.) The diversification

3069-521: The United Aircraft and Transport Corporation , a large, vertically integrated , amalgamated firm, uniting business interests in all aspects of aviation —a combination of aircraft engine and airframe manufacturing and airline business, to serve all aviation markets, both civil aviation (cargo, passenger, private , air mail ) and military aviation . After the Air Mail scandal of 1934,

3162-399: The surface state barrier that prevented the external electric field from penetrating the material. In 1955, Carl Frosch and Lincoln Derick accidentally grew a layer of silicon dioxide over the silicon wafer, for which they observed surface passivation effects. By 1957 Frosch and Derick, using masking and predeposition, were able to manufacture silicon dioxide field effect transistors;

3255-593: The 1970s and 1980s was higher-stakes and arguably unfocused. Rather than aviation being the central theme of UTC businesses, high tech (of any type) was the new theme. Some Wall Street watchers questioned the true value of M&A at almost any price, seemingly for its own sake. Mostek was sold in 1985 to the French electronics company Thomson . In 2007, UTC opened the Hawk Works, a Rapid Prototyping and Military Derivatives Completion Center (RPMDCC) located west of

3348-481: The 3DELRR EMD contract until 2017 and was to issue an amended solicitation at the end of July 2016. In 2017 the Air Force again awarded the contract to Raytheon. In May 2015, Raytheon acquired cybersecurity firm Websense, Inc. from Vista Equity Partners for $ 1.9 billion and combined it with RCP, formerly part of its IIS segment to form Raytheon|Websense. In October 2015, Raytheon|Websense acquired Foreground Security,

3441-465: The MOSFET made it possible to build high-density integrated circuits, allowing the integration of more than 10,000 transistors in a single IC. Bardeen and Brattain's 1948 inversion layer concept forms the basis of CMOS technology today. The CMOS (complementary MOS ) was invented by Chih-Tang Sah and Frank Wanlass at Fairchild Semiconductor in 1963. The first report of a floating-gate MOSFET

3534-427: The MOSFET was invented at Bell Labs between 1955 and 1960. Transistors revolutionized the field of electronics and paved the way for smaller and cheaper radios , calculators , computers , and other electronic devices. Most transistors are made from very pure silicon , and some from germanium , but certain other semiconductor materials are sometimes used. A transistor may have only one kind of charge carrier in

3627-618: The New York Stock Exchange under the ticker RTX. On July 28, 2020, the company announced cutting of over 8,000 jobs in its commercial aviation division due to travel slowdown induced by the global COVID-19 pandemic . In December 2020, the Board of Directors authorized a $ 5 billion repurchase of common stock. In 2022, during the Russian invasion of Ukraine , major arms manufacturers, including Raytheon Technologies, reported

3720-714: The Regency Division of Industrial Development Engineering Associates, I.D.E.A. and Texas Instruments of Dallas, Texas, the TR-1 was manufactured in Indianapolis, Indiana. It was a near pocket-sized radio with four transistors and one germanium diode. The industrial design was outsourced to the Chicago firm of Painter, Teague and Petertil. It was initially released in one of six colours: black, ivory, mandarin red, cloud grey, mahogany and olive green. Other colours shortly followed. The first production all-transistor car radio

3813-713: The U.S. government concluded that such large holding companies as United Aircraft and Transport were anti-competitive, and new antitrust laws were passed forbidding airframe or engine manufacturers from having interests in airlines. United Aircraft Corporation was formed in 1934 from United Aircraft and Transport's manufacturing interests east of the Mississippi River (Pratt & Whitney, Sikorsky, Vought, and Hamilton Standard Propeller Company), headquartered in Hartford with Frederick Rentschler , founder of Pratt & Whitney, as president. United Aircraft became

RTX Corporation - Misplaced Pages Continue

3906-527: The U.S. government. In April 2020, UTC merged with the Raytheon Company to form Raytheon Technologies, later renamed RTX Corporation . In 1974, Harry Jack Gray left Litton Industries to become the CEO of United Aircraft. He pursued a strategy of growth and diversification, changing the parent corporation's name to United Technologies Corporation (UTC) in 1975 to reflect the intent to diversify into numerous high tech fields beyond aerospace. (The change became official on May 1, 1975.) The diversification

3999-450: The atmosphere including manganese , nickel , chromium and related compounds. In the 2016 University of Massachusetts Amherst Toxic 100 Air Polluters Index, UTC was ranked 9th by a toxicity population exposure score. It was also reported they release 60,000 pounds (27,200 kg) of toxins into the air. Transistor A transistor is a semiconductor device used to amplify or switch electrical signals and power . It

4092-431: The basis of modern digital electronics since the late 20th century, paving the way for the digital age . The US Patent and Trademark Office calls it a "groundbreaking invention that transformed life and culture around the world". Its ability to be mass-produced by a highly automated process ( semiconductor device fabrication ), from relatively basic materials, allows astonishingly low per-transistor costs. MOSFETs are

4185-465: The board of directors (chairperson) position went to Louis Chênevert, then the company's CEO, in January 2010, succeeding George David. For the fiscal year 2017, United Technologies reported earnings of US$ 4.552 billion, with an annual revenue of US$ 59.837 billion, an increase of 4.5% over the previous fiscal cycle. United Technologies shares traded at over $ 114 per share, and its market capitalization

4278-404: The body is connected to the source inside the package, and this will be assumed for the following description. In a FET, the drain-to-source current flows via a conducting channel that connects the source region to the drain region. The conductivity is varied by the electric field that is produced when a voltage is applied between the gate and source terminals, hence the current flowing between

4371-437: The collector to the emitter. If the voltage difference between the collector and emitter were zero (or near zero), the collector current would be limited only by the load resistance (light bulb) and the supply voltage. This is called saturation because the current is flowing from collector to emitter freely. When saturated, the switch is said to be on . The use of bipolar transistors for switching applications requires biasing

4464-402: The company was responsible for about 80 percent of all magnetrons manufactured. During the war, Raytheon also pioneered the production of shipboard radar systems, particularly for submarine detection. Raytheon ranked 71st among United States corporations in the value of World War II military production contracts. In 1945, Raytheon's Percy Spencer invented the microwave oven by discovering that

4557-445: The concept of an inversion layer, forms the basis of CMOS and DRAM technology today. In the early years of the semiconductor industry , companies focused on the junction transistor , a relatively bulky device that was difficult to mass-produce , limiting it to several specialized applications. Field-effect transistors (FETs) were theorized as potential alternatives, but researchers could not get them to work properly, largely due to

4650-559: The current in the base. Because the base and emitter connections behave like a semiconductor diode, a voltage drop develops between them. The amount of this drop, determined by the transistor's material, is referred to as V BE . (Base Emitter Voltage) Transistors are commonly used in digital circuits as electronic switches which can be either in an "on" or "off" state, both for high-power applications such as switched-mode power supplies and for low-power applications such as logic gates . Important parameters for this application include

4743-456: The current switched, the voltage handled, and the switching speed, characterized by the rise and fall times . In a switching circuit, the goal is to simulate, as near as possible, the ideal switch having the properties of an open circuit when off, the short circuit when on, and an instantaneous transition between the two states. Parameters are chosen such that the "off" output is limited to leakage currents too small to affect connected circuitry,

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4836-590: The deal, Pratt and Whitney and the newly-formed Collins Aerospace remained under United Technologies, while Otis Elevator and UTC Climate, Controls & Security (doing business as Carrier ) were spun off as two independent companies. The spin off was completed in March 2020. In June 2019, United Technologies announced the intention to merge with the Raytheon Company. The combined company, valued at more than $ 100 billion after planned spinoffs, would be

4929-434: The defense unit of Texas Instruments , Defense Systems & Electronics Group (1997). The businesses were purchased for $ 2.3 billion and $ 2.95 billion, respectively. Also in 1997, Raytheon acquired the aerospace and defense business of Hughes Aircraft Company from Hughes Electronics Corporation , a subsidiary of General Motors , which included a number of product lines previously purchased by Hughes Electronics, including

5022-460: The drain and source is controlled by the voltage applied between the gate and source. As the gate–source voltage ( V GS ) is increased, the drain–source current ( I DS ) increases exponentially for V GS below threshold, and then at a roughly quadratic rate: ( I DS ∝ ( V GS − V T ) , where V T is the threshold voltage at which drain current begins) in the " space-charge-limited " region above threshold. A quadratic behavior

5115-847: The fire and security business by purchasing Chubb Security . In 2004, UTC acquired the Schweizer Aircraft Corporation which planned to operate as a wholly owned subsidiary under their Sikorsky Aircraft division. In 2005, UTC further pursued its stake in the fire and security business by purchasing Kidde . Also in 2005, UTC acquired Boeing's Rocketdyne division, which was merged into the Pratt & Whitney business unit and renamed Pratt & Whitney Rocketdyne (later sold to Aerojet and merged into Aerojet Rocketdyne ). In November 2008, UTC's Carrier Corporation acquired NORESCO, an energy service company . In 2010, UTC conducted its largest acquisition to date, General Electric 's security equipment business for US$ 1.8 billion,

5208-463: The first planar transistors, in which drain and source were adjacent at the same surface. They showed that silicon dioxide insulated, protected silicon wafers and prevented dopants from diffusing into the wafer. After this, J.R. Ligenza and W.G. Spitzer studied the mechanism of thermally grown oxides, fabricated a high quality Si/ SiO 2 stack and published their results in 1960. Following this research, Mohamed Atalla and Dawon Kahng proposed

5301-612: The following May and be replaced by company president Christopher Calio. In August 2024, RTX was fined US$ 200 million for International Traffic in Arms Regulations violations, including exchanging data and products with prohibited countries such as China. After the 2020 merger, Raytheon Technologies Corporation consisted of four business units: In 2023, the company changed its name to RTX Corporation and re-organized into three business units: United Technologies Corporation United Technologies Corporation ( UTC )

5394-454: The following limitations: Transistors are categorized by Hence, a particular transistor may be described as silicon, surface-mount, BJT, NPN, low-power, high-frequency switch . Convenient mnemonic to remember the type of transistor (represented by an electrical symbol ) involves the direction of the arrow. For the BJT , on an n-p-n transistor symbol, the arrow will " N ot P oint i N" . On

5487-713: The former General Dynamics missile business (Pomona facility), the defense portion of Delco Electronics (Delco Systems Operations), and Magnavox Electronic Systems . Raytheon also divested itself of several nondefense businesses in the 1990s, including Amana Refrigeration and Seismograph Service Ltd (sold to Schlumberger - Geco-Prakla ). In November 2007, Raytheon purchased robotics company Sarcos , and in October 2009, Raytheon acquired BBN Technologies . In December 2010, Applied Signal Technology agreed to be acquired by Raytheon for $ 490 million. In October 2014, Raytheon beat rivals Lockheed Martin and Northrop Grumman for

5580-533: The funds were contributed to Republicans, 35% percent to Democrats; In 2005, the firm was among 53 entities that contributed the maximum of $ 250,000 to the second inauguration of President George W. Bush . In 1981, a contribution from UTC made possible the exhibition "Paris/Magnum: Photographs 1935–1981", featuring photographs of Paris taken by photographers of Magnum Photos , the agency founded in 1947 by Robert Capa , George Rodger , Henri Cartier-Bresson , William Vandivert , and David Seymour . A volume of

5673-505: The idea of a field-effect transistor that used an electric field as a "grid" was not new. Instead, what Bardeen, Brattain, and Shockley invented in 1947 was the first point-contact transistor . To acknowledge this accomplishment, Shockley, Bardeen and Brattain jointly received the 1956 Nobel Prize in Physics "for their researches on semiconductors and their discovery of the transistor effect". Shockley's team initially attempted to build

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5766-474: The intention to merge with defense contractor Raytheon to form Raytheon Technologies Corporation. The combined company, valued at more than $ 100 billion after planned spinoffs, would be the world's second-largest aerospace-and-defense company by sales behind Boeing. Although UTC was the nominal survivor, the merged company was headquartered at legacy Raytheon's former base in Waltham, Massachusetts . The merger

5859-418: The inventions of the junction transistor in 1948 and the MOSFET in 1959. The MOSFET is by far the most widely used transistor, in applications ranging from computers and electronics to communications technology such as smartphones . It has been considered the most important transistor, possibly the most important invention in electronics, and the device that enabled modern electronics. It has been

5952-562: The magnetron could rapidly heat food. In 1947, the company demonstrated the Radarange microwave oven for commercial use. After the war, Raytheon developed the first guidance system for a missile that could intercept a flying target. In 1948, Raytheon began to manufacture guided missiles , including the SAM-N-2 Lark , and eventually the air-to-air AIM-7 Sparrow , and the ground-to-air MIM-23 Hawk missiles. In 1959, Raytheon acquired

6045-425: The marine electronics company Apelco Applied Electronics, which significantly increased its strength in commercial marine navigation and radio gear, and changed its name to Raytheon Company. During the post-war years, Raytheon also made generally low- to medium-powered radio and television transmitters and related equipment for the commercial market. In the 1950s, Raytheon began manufacturing transistors , including

6138-558: The mechanical encoding from punched metal cards. The first prototype pocket transistor radio was shown by INTERMETALL, a company founded by Herbert Mataré in 1952, at the Internationale Funkausstellung Düsseldorf from August 29 to September 6, 1953. The first production-model pocket transistor radio was the Regency TR-1 , released in October 1954. Produced as a joint venture between

6231-927: The most numerously produced artificial objects in history, with more than 13 sextillion manufactured by 2018. Although several companies each produce over a billion individually packaged (known as discrete ) MOS transistors every year, the vast majority are produced in integrated circuits (also known as ICs , microchips, or simply chips ), along with diodes , resistors , capacitors and other electronic components , to produce complete electronic circuits. A logic gate consists of up to about 20 transistors, whereas an advanced microprocessor , as of 2022, may contain as many as 57 billion MOSFETs. Transistors are often organized into logic gates in microprocessors to perform computation. The transistor's low cost, flexibility and reliability have made it ubiquitous. Transistorized mechatronic circuits have replaced electromechanical devices in controlling appliances and machinery. It

6324-548: The potential in this, and over the next few months worked to greatly expand the knowledge of semiconductors . The term transistor was coined by John R. Pierce as a contraction of the term transresistance . According to Lillian Hoddeson and Vicki Daitch, Shockley proposed that Bell Labs' first patent for a transistor should be based on the field-effect and that he be named as the inventor. Having unearthed Lilienfeld's patents that went into obscurity years earlier, lawyers at Bell Labs advised against Shockley's proposal because

6417-405: The resistance of the transistor in the "on" state is too small to affect circuitry, and the transition between the two states is fast enough not to have a detrimental effect. In a grounded-emitter transistor circuit, such as the light-switch circuit shown, as the base voltage rises, the emitter and collector currents rise exponentially. The collector voltage drops because of reduced resistance from

6510-590: The same title, with text by Irwin Shaw and an introduction by Inge Morath , was also published in 1981. UTC is the sponsor of the exhibition "Aphrodite and the Gods of Love" at Boston's Museum of Fine Arts that opened in fall 2011. The firm and its subsidiaries are major contributors to museums such as the New England Air Museum . In April 2015, UTC signed an education partnership agreement with

6603-463: The successor of the same name, Raytheon Manufacturing Company. By the 1930s, it had already grown to become one of the world's largest vacuum tube manufacturing companies. In 1933 it diversified by acquiring Acme-Delta Company, a producer of transformers , power equipment, and electronic auto parts . During World War II, Raytheon mass-manufactured magnetron tubes for use in microwave radar sets and then complete radar systems . At war's end in 1945,

6696-409: The transistor so that it operates between its cut-off region in the off-state and the saturation region ( on ). This requires sufficient base drive current. As the transistor provides current gain, it facilitates the switching of a relatively large current in the collector by a much smaller current into the base terminal. The ratio of these currents varies depending on the type of transistor, and even for

6789-483: The transistor, the company rushed to get its "transistron" into production for amplified use in France's telephone network, filing his first transistor patent application on August 13, 1948. The first bipolar junction transistors were invented by Bell Labs' William Shockley, who applied for patent (2,569,347) on June 26, 1948. On April 12, 1950, Bell Labs chemists Gordon Teal and Morgan Sparks successfully produced

6882-423: The triode. He filed identical patents in the United States in 1926 and 1928. However, he did not publish any research articles about his devices nor did his patents cite any specific examples of a working prototype. Because the production of high-quality semiconductor materials was still decades away, Lilienfeld's solid-state amplifier ideas would not have found practical use in the 1920s and 1930s, even if such

6975-406: The value of wartime production contracts. At the close of the war, United Aircraft entered the emerging markets for jet engines and helicopters , via Pratt & Whitney and Sikorsky, respectively. In the 1950s, United Aircraft began developing jet engines, including the Pratt & Whitney J57 , the most powerful jet engine on the market for some years. In the 1960s, Pratt & Whitney produced

7068-643: The weight of losses incurred by the commercial M&A side of the business. Although M&A activity was not new to United Aircraft, the M&;A activity of the 1970s and 1980s was higher-stakes and arguably unfocused. Rather than aviation being the central theme of UTC businesses, high tech (of any type) was the new theme. Some Wall Street watchers questioned the true value of M&A at almost any price, seemingly for its own sake. In 1999, UTC acquired Sundstrand Corporation and merged it into UTC's Hamilton Standard unit to form Hamilton Sundstrand . In 2003, UTC entered

7161-408: The widespread adoption of transistor radios. Seven million TR-63s were sold worldwide by the mid-1960s. Sony's success with transistor radios led to transistors replacing vacuum tubes as the dominant electronic technology in the late 1950s. The first working silicon transistor was developed at Bell Labs on January 26, 1954, by Morris Tanenbaum . The first production commercial silicon transistor

7254-523: The world's second-largest aerospace-and-defense company by sales behind Boeing. Although UTC was the legal survivor, the merged company took the name Raytheon Technologies and based its headquarters at Raytheon's former campus in Waltham, Massachusetts , rather than UTC's former base in Farmington, Connecticut . The merger was completed in April 2020. Raytheon Technologies began trading at $ 51 per share, on

7347-400: Was a white knight move against hostile takeover designs by Gould . At one point, the military portion of UTC's business, whose sensitivity to "excess profits" and boom/bust demand drove UTC to diversify away from it, actually carried the weight of losses incurred by the commercial M&A side of the business. Although M&A activity was not new to United Aircraft, the M&A activity of

7440-525: Was a few ten-thousandths of an inch thick. Indium electroplated into the depressions formed the collector and emitter. AT&T first used transistors in telecommunications equipment in the No. 4A Toll Crossbar Switching System in 1953, for selecting trunk circuits from routing information encoded on translator cards. Its predecessor, the Western Electric No. 3A phototransistor , read

7533-411: Was an American multinational conglomerate headquartered in Farmington, Connecticut . It researched, developed, and manufactured products in numerous areas, including aircraft engines , aerospace systems, HVAC , elevators and escalators , fire and security , building automation, and industrial products, among others. UTC was also a large military contractor, getting about 10% of its revenue from

7626-486: Was announced by Texas Instruments in May 1954. This was the work of Gordon Teal , an expert in growing crystals of high purity, who had previously worked at Bell Labs. The basic principle of the field-effect transistor (FET) was first proposed by physicist Julius Edgar Lilienfeld when he filed a patent for a device similar to MESFET in 1926, and for an insulated-gate field-effect transistor in 1928. The FET concept

7719-480: Was completed in April 2020. In March 2020, United Technologies Corporation announced the separations of Carrier Global and Otis Worldwide . In April 2008, Louis Chênevert succeeded George David as the company's chief executive officer (CEO). Chênevert served until 2014, when he was succeeded by Gregory Hayes . The chief financial officer 's (CFO) position was held by Gregory Hayes until 2014, when he succeeded Louis Chênevert as CEO. The chairman of

7812-469: Was developed by Chrysler and Philco corporations and was announced in the April 28, 1955, edition of The Wall Street Journal . Chrysler made the Mopar model 914HR available as an option starting in fall 1955 for its new line of 1956 Chrysler and Imperial cars, which reached dealership showrooms on October 21, 1955. The Sony TR-63, released in 1957, was the first mass-produced transistor radio, leading to

7905-671: Was discovered that UTC sold military technology to the Chinese. For pleading guilty to violating the Arms Export Control Act and making false statements, United Technologies and its subsidiaries were fined $ 75 million. In February 2013, UTC Power was sold to ClearEdge Power . In October 2014, Toshiba and United Technologies made a deal to expand their joint venture outside Japan . In February 2016, UTC subsidiary Carrier Air Conditioner announced to employees at its Indianapolis and Huntington plants, that Carrier

7998-918: Was independently invented by physicists Herbert Mataré and Heinrich Welker while working at the Compagnie des Freins et Signaux Westinghouse , a Westinghouse subsidiary in Paris . Mataré had previous experience in developing crystal rectifiers from silicon and germanium in the German radar effort during World War II . With this knowledge, he began researching the phenomenon of "interference" in 1947. By June 1948, witnessing currents flowing through point-contacts, he produced consistent results using samples of germanium produced by Welker, similar to what Bardeen and Brattain had accomplished earlier in December 1947. Realizing that Bell Labs' scientists had already invented

8091-455: Was later also theorized by engineer Oskar Heil in the 1930s and by William Shockley in the 1940s. In 1945 JFET was patented by Heinrich Welker . Following Shockley's theoretical treatment on JFET in 1952, a working practical JFET was made in 1953 by George C. Dacey and Ian M. Ross . In 1948, Bardeen and Brattain patented the progenitor of MOSFET at Bell Labs, an insulated-gate FET (IGFET) with an inversion layer. Bardeen's patent, and

8184-521: Was made by Dawon Kahng and Simon Sze in 1967. In 1967, Bell Labs researchers Robert Kerwin, Donald Klein and John Sarace developed the self-aligned gate (silicon-gate) MOS transistor, which Fairchild Semiconductor researchers Federico Faggin and Tom Klein used to develop the first silicon-gate MOS integrated circuit . A double-gate MOSFET was first demonstrated in 1984 by Electrotechnical Laboratory researchers Toshihiro Sekigawa and Yutaka Hayashi. The FinFET (fin field-effect transistor),

8277-401: Was not possible to construct a working device at that time. The first working device was a point-contact transistor invented in 1947 by physicists John Bardeen , Walter Brattain , and William Shockley at Bell Labs who shared the 1956 Nobel Prize in Physics for their achievement. The most widely used type of transistor is the metal–oxide–semiconductor field-effect transistor (MOSFET),

8370-513: Was partially to balance civilian business against any overreliance on military business. UTC became a mergers and acquisitions (M&A)–focused organization, with various forced takeovers of unwilling smaller corporations. The next year (1976), UTC forcibly acquired Otis Elevator . In 1979, Carrier Refrigeration and Mostek were acquired; the Carrier deal was forcible, while the Mostek deal

8463-502: Was partially to balance civilian business against any overreliance on military business. UTC became a mergers and acquisitions (M&A)–focused organization, with various forced takeovers of unwilling smaller corporations. The next year (1976), UTC forcibly acquired Otis Elevator . In 1979, Carrier Refrigeration was acquired; At one point the military portion of UTC's business, whose sensitivity to "excess profits" and boom/bust demand drove UTC to diversify away from it, actually carried

8556-749: Was preceded by the rebranding to RTX in June 2023. In July 2023, Raytheon Technologies Corporation changed its name to RTX Corporation. RTX's supply of weapons to Israel led to protests against the company during the 2023 Israel–Hamas war . On December 14, 2023, for example, protestors blocked the entrance to an RTX facility in Arizona. In early 2024, 15 people were arrested after blocking access to RTX and BAE Systems facilities in Louisville, Kentucky in protest against supplying weapons to Israel. In December 2023, RTX announced that CEO Greg Hayes would step down

8649-449: Was valued at US$ 98.6 billion in October 2018. UTC ranked No. 51 in the 2018 Fortune 500 list of the largest United States corporations by total revenue. During the 2004 election cycle , UTC was the sixth largest defense industry donor to political campaigns, contributing a total of $ 789,561; 64% went to Republicans. In the 2006 election cycle , UTC was again the sixth largest donor to federal candidates and political parties; 53% of

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