Actually, a transistor is a device made from semiconductor material, and they're used to amplify and switch electronic signals as well as electrical power. Before transistors were invented, product engineers had to use vacuum tubes and electromechanical switches in order to complete electric circuits.
The importance of the Transistor was that it could amplify an electrical signal. It was thus an analog of the vacuum tube devices, and could take advantage of the circuit history and applications that had built up over the preceding 50 years.
to amplify a small signal to sufficient level,so that it can travel to a large distance from first stage till the last stage
A high signal input to a transistor amplifier gives a high signal output provided it stays linear.
A transistor controls the flow of current between the emitter and collector. The larger current is supplied by the power supply, across the emitter and collector. The flow is then controlled by a small current applied to the base connection. So, a large current flow mimics the small signal current. Limits are reached, when the transistor gets close to being fully switched on or off. This will cause distortion. To avoid this, more amplification is provided by a series of transistor amplifiers, one after the other.
The PNP transistors conducts when there is no signal at base (0V or grounded), when base current is increased the conduction of PNP transistor decreases.
The work of a transistor is to amplify the input signal to get high output value.
Transistor is an active element because it can amplify the signal applied.
It depends on how you bias the transistor. If you ground the emitter, which is very common, you will need to offset the input signal so you can amplify the full voltage swing.
Active devices are those devices which can produce power or which can amplify the signal Such devices are- diode transistor op-amp
An amplifier that is designed to amplify the signal from an electric guitar and drive a speaker to convert that signal to sound.
The output current of a transistor is controlled by the current in the 'base' input: Increasing the control current will increase the output current in a more or less linear fashion. In the saturation region, this is no longer true: The transistor is nearing the limits of how much current it can conduct, so increasing the control current further has little or no effect. When using a transistor as an amplifier, you want to stay away from the saturation region as it would distort the signal you are amplifying. When using a transistor as an on/off switch, as in digital circuits, being in the saturated region is 'on' and a normal mode of operation.
Power transistor can conduct large amount of currents through it, more than small signal transistor. power transistor has a vertical structure and small signal transistor has horizontal structure.In power transistor quasi saturation region is present which is absent in the small signal transistor. In power transistor there is a inculsion of drift layer which is not there in the small signal transistor. Power dissipation is less in power transistor and it is more in small signal transistor. b.v.polytechnic,vasai pushkar vaity.
The importance of the Transistor was that it could amplify an electrical signal. It was thus an analog of the vacuum tube devices, and could take advantage of the circuit history and applications that had built up over the preceding 50 years.
Amplifiers are the device which are used to amplify a signal Multistage amplifier are use to amplify a signal into a desire level
Yes, a transistor can amplifiy an a.c. signal.
The main use of transistors in electronic circuits is as switches and memory storage
Amplify is a verb. This device amplifies the signal from the microphone so that it can be heard.