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LOC05b Resistors in Series and Parallel
LOC05b Resistors in Series and Parallel

... parallel across a power supply as shown in Figure 4, the potential difference across each resistor is equal to that supplied by the power supply. What about the current? A current I flows out of the power supply. Let I 1 be the current flowing through R1 and let I 2 be the current flowing through R2 ...
LOC12a Resistors in Series and Parallel
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... parallel across a power supply as shown in Figure 4, the potential difference across each resistor is equal to that supplied by the power supply. What about the current? A current I flows out of the power supply. Let I 1 be the current flowing through R1 and let I 2 be the current flowing through R2 ...
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... o.k. for led’s but not much use for anything else. In this topic we are going to look at the operation of another component called the transistor. The transistor is considered by many to be the greatest invention of the twentieth-century, or as one of the greatest. It is the key active component in ...
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... loss or unwanted heating of parts of the structures. To mitigate this problem, suspending, interfacing structures can be made to offer a high thermal resistance, either through their shape or material. Materials such as Pyrex or quartz glass are typically used because of their low thermal conductivi ...
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BDTIC  Application Note No. 017
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... Improved stabilization behaviour versus temperature reduced variation in amplifier performance due to the device‘s Beta (current gain) distribution can be achieved by using an active bias circuit. Such a circuit is available as a single device from Infineon - BCR400W. For further information please ...
BDTIC  Application Note No. 019
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... Improved stabilization behaviour versus temperature and reduced variation in amplifier performance due to the device‘s Beta (current gain) distribution can be achieved by using an active bias circuit. Such a circuit is available as a single device from Infineon - BCR400W. For further information ple ...
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BDTIC  www.BDTIC.com/infineon Application Note No. 018
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... The layout size can be reduced by using chip inductors instead of the microstrip lines TrL1 and TrL6 Improved stabilization behaviour versus temperature and reduced variation in amplifier performance due to the device‘s Beta (current gain) distribution can be achieved by using an active bias circuit ...
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Invention of the integrated circuit



The idea of integrating electronic circuits into a single device was born when the German physicist and engineer Werner Jacobi developed and patented the first known integrated transistor amplifier in 1949 and the British radio engineer Geoffrey Dummer proposed to integrate a variety of standard electronic components in a monolithic semiconductor crystal in 1952. A year later, Harwick Johnson filed a patent for a prototype integrated circuit (IC).These ideas could not be implemented by the industry in the early 1950s, but a breakthrough came in late 1958. Three people from three U.S. companies solved three fundamental problems that hindered the production of integrated circuits. Jack Kilby of Texas Instruments patented the principle of integration, created the first prototype ICs and commercialized them. Kurt Lehovec of Sprague Electric Company invented a way to electrically isolate components on a semiconductor crystal. Robert Noyce of Fairchild Semiconductor invented a way to connect the IC components (aluminium metallization) and proposed an improved version of insulation based on the planar technology by Jean Hoerni. On September 27, 1960, using the ideas of Noyce and Hoerni, a group of Jay Last's at Fairchild Semiconductor created the first operational semiconductor IC. Texas Instruments, which held the patent for Kilby's invention, started a patent war, which was settled in 1966 by the agreement on cross-licensing.There is no consensus on who invented the IC. The American press of the 1960s named four people: Kilby, Lehovec, Noyce and Hoerni; in the 1970s the list was shortened to Kilby and Noyce, and then to Kilby, who was awarded the 2000 Nobel Prize in Physics ""for his part in the invention of the integrated circuit"". In the 2000s, historians Leslie Berlin, Bo Lojek and Arjun Saxena reinstated the idea of multiple IC inventors and revised the contribution of Kilby.
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