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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 circuit. 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.
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How many transistors are on a Phenom II 965?
758 Million transistors.
What are transistors used for?
Transistors have two basic functions: # an electrically controlled electric switch # an electrically controlled "proportional valve" which can alter currents and voltages, or can amplify electric signals. Transistors can also be configured as Oscillators which provide an AC signal with constant frequency. Either an amplifier circuit or a switching circuit can be wired as an oscillator. Transistors can be used to form logic gates: And, Or, and Invert. Computers are made from logic gates, so computers can be made entirely from transistors. Transistors are in use in virtually all electronic devices. PC processors are composed of millions of tiny transistors. A transistor radio may have had only 6-10 transistors to enable operation. A late model car may have 10 to 15 computers comprised of thousands of transistors to perform all manner of operations in the vehicle.
What is btj transistors?
They are NPN and PNP. BJT mean bipolar junction transistors. there are two P-N junctions in BJT transisters.
How many types of field effect transistor?
There are two types of field effect transistors:junction field effect transistors andmetal-oxide semiconductor field effect transistors.
How many transistors can fit in a microchip the size of a penny?
That depends:simple passive circuits have no transistorsvacuum tube circuits have no transistorssolid state circuits can have anywhere from no transistors (just diodes and/or magnetic amplifying transformers) to as many transistors as needed to perform the function
What are power transistors?
Power transistors are transistors that are used in high-power amplifiers and power supplies.
Are transistors semiconductors?
Transistors are made out of semiconductors, yes.
What element are in transistors?
Silicon and germanium are the elements used in transistors
What elements in in transistors?
Silicon and germanium are the elements used in transistors
Why are npn transistors used more often than pnp transistors?
The primary reason that NPN transistors are used more often than PNP transistors is that they usually operate faster (at higher frequencies) because the mobility of the current carriers in NPN transistors (electrons) is much higher than that of the current carriers in PNP transistors (holes).
What elements are used in transistors?
Silicon and germanium are the elements used in transistors
How many transistors are on a Phenom II 965?
758 Million transistors.
How did colossus work without transistors?
There were vacuum tubes before transistors
Do phones have transistors?
yes, Mobile phones are having transistors.
How do you install transistors on Toyota 5fbc25?
how to install TMS003 transistors on Toyota 5fbxc25
What replaced vacuum tubes in the computer?
Integrated circuits (in many microprocessor integrated circuits) containing many billions of transistors each.
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.
