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a) to act as a switching device; a change in the bias voltage at the base- emitter junction can cause an increase in signal flowing through the transistor through the collector terminal
and this cause the output voltage at the collector terminal to change; eg to drop to a low voltage level, this is seen as the transistor device switching on to maximum conduction rate and a low level output at the collector.
b) to act an amplifer . whether the input signal is an ac type signal in which case its a signal power amplifer function; eg sound amplifer control circuits , or whether a dc input signal, in which case the input dc signal is amplfied to be reproduced as a bigger signal at the output collector terminal
Wiki User
∙ 8y ago
Wiki User
∙ 8y ago- amplifier
- switch
- current source/regulator
- voltage source/regulator
- modulator
- demodulator
- etc.
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Why are transistors used in circuits?
The two main functions of a transistor are: (a) signal amplification, and (b) solid-state switching.
What is transistor mos?
Metal Oxide Semiconductor. Usually used when referring to a specific type of transistor which uses this type of semiconductor material: the Field Effect Transistor (FET).
What device uses a lot of power and gives off a lot of heat?
transistor
Why different transistor have different resistance?
Because they are different transistors. Resistance among their internal diodes is one of the main features of a transistor.
2 transistor analogy for scr and derivation for expression of anode current?
a thyristor can be considered as two complementary transistors , one pnp- transistor, and other npn transistor
What is darlington configuaration?
A Darlington pair uses two transistors connected to behave as a single transistor with a very high current gain (beta). Transistor-1 has its collector connected to the collector of transistor-2. Transistor-1 has its emitter connected to the base of transistor-2. The base of transistor-1 with the emitter and collector of transistor-2 is used as a single transistor.
Why are transistors used in circuits?
The two main functions of a transistor are: (a) signal amplification, and (b) solid-state switching.
What is a sentence with the word transistor in it?
A transistor is a solid state electronic device that replaced vacuum tubes for most uses.
How is the NPN transistor different from the PNP transistor?
"P" is for Positive and "N" is for Negative So basically put a PNP Transistor Would use N to Switch P, in the name "PNP" or "NPN" the first character is for the polarity of the Collector-pin, the second for the Base-Pin, and the third for the Emmiter-pin. So if you have a PNP Transistor you can`t just replace it with an NPN as the polarities differ. If you can find a way to change those polarities then sure it could work. The Collector-pin basically receives the bigger current. The Base-pin determines how much of that current will be transferred to the emmiter-pin. So in a PNP the base current could for example be 0V and the Collector 5V, this will allow a free flow of current from Collector to Emmiter, the usage of a transistor in many cases is to switch high current with lower current. The main difference is that a PNP transistor uses "holes" as carriers and an NPN transistor uses electrons as carriers (It is to be remembered that the flow of current is always in the direction opposite to that of the flow of electrons). The difference in the symbol for the two transistors are that the PNP transistor will have an arrow pointed to the base from the emitter, and the NPN has it pointing outside.
What is transistor mos?
Metal Oxide Semiconductor. Usually used when referring to a specific type of transistor which uses this type of semiconductor material: the Field Effect Transistor (FET).
Why npn transistor are more using than pnp transistor give one or two reasons?
A; Main reason is because people like to think positive and the NPN needs a positive voltage to operate
What are 2 main uses of rocks?
Two main uses of rock are using them for building materials and industrial processes.
What are the three main connections in a transistor?
A transistor has three connection points. The connection points are base, emitter, and collector.
What are two main uses of rocks?
The two main uses of rocks are for industrial processes and building materials. Rocks can be used in many things every day.
Number of depletion regions in transistor?
two The transistor has one depletion layer.
What is the main work of transistors in an electronic circuit?
The main use of transistors in electronic circuits is as switches and memory storage
What is composite transistor?
A Darlington transistor is a composite transistor. The definition is a combination of two or more transistors that have the purpose of increasing the current gain.
