Contents
What is a transistor operation?
A transistor works when the electrons and the holes start moving across the two junctions between the n-type and p-type silicon. By turning a small input current into a large output current, the transistor acts like an amplifier. But it also acts like a switch at the same time.
What is transistor explain briefly about transistor types and its operation?
Transistor is a semiconductor device which is used to either amplify the signals or to act as an electrically controlled switch. A Transistor is a three terminal device and a small current / voltage at one terminal (or lead) will control a large flow of current between the other two terminals (leads).
What are the two main operating modes of a transistor?
What are the operating modes of a transistor?
- Saturation — The transistor acts like a short circuit.
- Cut-off — The transistor acts like an open circuit.
- Active — The current from collector to emitter is proportional to the current flowing into the base.
What are the three regions of transistor operation?
The three regions are the emitter region (E), base region (B), and the collector region (c) and these regions are differently doped depending on the type of bipolar transistor it is.
How does the operation of a transistor work?
The central idea to the operation of a transistor is that a little bit of current flowing between the base and emitter causes a larger current to flow between the collector and emitter. A transistor is essentially an amplifier.
How many types of transistors are there in a circuit?
Based on how they are used in a circuit there are mainly two types of transistors. The three terminals of BJT are base, emitter and collector. A very small current flowing between base and emitter can control a larger flow of current between the collector and emitter terminal. Furthermore, there are two types of BJT.
How does biasing control the operation of a transistor?
Biasing is controlling the operation of the circuit by providing power supply. The function of both the PN junctions is controlled by providing bias to the circuit through some dc supply. The figure below shows how a transistor is biased.
Why are the terminals of a transistor not interchangeable?
As the collector of a transistor has to dissipate much greater power, it is made large. Due to the specific functions of emitter and collector, they are not interchangeable. Hence the terminals are always to be kept in mind while using a transistor.