Results for: Transistor

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In Electronics Engineering

What is a transistor?

A transistor is an electronic component known as a semiconductor.The first practical transistor was invented in 1947 and became analternative to vacuum tubes (valves) and rela… (MORE)

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In Consumer Electronics

What are transistors?

Answer Transistors are semiconductor devices which can be used as switches (to turn on and off an electrical signal or current path) and also as a signal amplifier in a circ…uit. There are two broad types of transistors BJT (Bipolar Junction Transistor) and FET (Field Effect Transistors). - Neeraj Sharma A transistor is a silicon device with 3 leads, emiter, collector, and base. It is used both as a fast switching device and for signal amplification. It is said to be "saturated" when maximum current is flowing and "cutoff" when no current is flowing from the emiter to the collector. It takes a difference of approx. .7 volts between the emiter and base to turn it "on". Good switch but actually inferior in sound quality to its predicessor, the "Thermionic" or good ole vacuum tube. If you don't believe me, listen to a guitarist play through both a transistor and vacuum tube guitar amp. You will be quite amazed!!! For signal amplification the input signal goes into the base and the amplified output signal is taken at the collector with the transistor operating, or biased, between cutoff and saturation. It would be normally biased in between cutoff and saturation for the signal to be "linear" or non distorted. The signal at the collector will be inverted (180 phase shift) with respect to the input signal. There are other applications where the output is taken at the emiter where the signal is not inverted (in phase) with respect to the input signal. This configuration, generally, has no gain or has what is called "unity gain". Sometimes you see this when separate stages need to be impedance matched for maximum efficiency. The transistor is first "biased" or configured for a specific amount of gain and the output signal is taken at the collector with a higher amplitude than the input at the base. A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power . It is composed of semiconductor material with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal. Today, some transistors are packaged individually, but many more are found embedded in integrated circuits . The transistor is the fundamental building block of modern electronic devices, and is ubiquitous in modern electronic systems. Following its development in 1947 by John Bardeen , Walter Brattain , and William Shockley, the transistor revolutionized the field of electronics, and paved the way for smaller and cheaper radios, calculators, and computers, among other things. The transistor is on the list of IEEE milestones in electronics, and the inventors were jointly awarded the 1956 Nobel Prize in Physics for their achievement. (MORE)

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In Science

What is transistorized?

A device such as a radio can be said to be transistorized when earlier designs are replaced by designs in which transistors replace vacuum tubes.

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In Electronics Engineering

Why transistor is called transistor of resistor?

What?. In May 28, 1946, a survey conducted by Bell Labs offered âa discussion of some proposed namesâ. Among them was "transconductance/transfer varistor".. So th… (MORE)

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In Electronics Engineering

What is does a transistor do?

It is basically an electronic "thing" that has three terminals. Lets say E (emitter), B (base) and C (collector). Lets say we connect C to positive of a battery and E… (MORE)

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In Electronics Engineering

Why a transistor is called a transistor?

Because in this device the resistance between two terminalrespectively collector and emitter is changed by changing the basevoltage that is it transfers the resistance between… (MORE)

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In Electronics Engineering

Why transistors are called transistors?

Previous answer "TRANSISTORS are current controlled voltage soruce" Nup, current-controlled current controller. Named as a contraction of TRANSference resISTOR.

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In Electronics Engineering

What does a transistor do?

Depending on how the transistor is biased and various othercircuits connected to it, a transistor acts as an amplifier and/orswitch. When acting as an amplifier the circuit co… (MORE)

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In Electronics Engineering

Why the name is Transistor-transistor logic?

TTL - transistor-transistor logic uses connections between transistors to perform logic functions, rather than connections using resistors or diodes. . T - transistor input … (MORE)

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In Electronics Engineering

What are the advantages of transistor transistor logic?

1. Speed, when compared to the previous RTL and DTL. 2. More complex circuitry, compared to RTL/DTL. 3. Smaller packages compared to RTL/DTL. 4. Depending on type, lower po… (MORE)