How does common base configuration work?

How does common base configuration work?

The input signal is applied between the emitter and base terminals while the corresponding output signal is taken across the collector and base terminals. Thus the base terminal of a transistor is common for both input and output terminals and hence it is named as common base configuration.

What is the working of PNP transistor?

The PNP transistor turns on when a small current flows through the base. The direction of current in PNP transistor is from the emitter to collector. The letter of the PNP transistor indicates the voltage requires by the emitter, collector and the base of the transistor.

What is the common base configuration of a transistor?

Thus the common base transistor configuration is also referred to as a: current buffer or current follower configuration, and the opposite of the common-collector (CC) configuration which is referred to as a voltage follower.

How does the common base amplifier work?

The Common Base Amplifier is a type of BJT configuration or bipolar junction transistor, in which the input and output signals share the base terminal of the transistor, hence the name common base (CB).

What are the characteristics of common base configuration?

Common Base (CB) Configuration of Transistor This configuration offers low input impedance, high output impedance, high resistance gain and high voltage gain.

What is transistor explain the working of PNP and NPN transistor?

A bipolar junction transistor is formed by three layers of semiconductor materials, if it is a PNP transistor, it will have two P-type regions and one N-type region, likewise, if it is an NPN transistor, it will have two N-type regions and one P-type region.

What is transistor explain working of PNP and NPN transistor as amplifier?

A PNP transistor is obtained by sandwiching a thin block of N-type semiconductor in between two blocks of P-type semiconductor. A thin block of P-type semiconductor sandwiched in between two blocks of N-type semiconductor forms a NPN transistor.

What is meant by common base?

In electronics, a common-base (also known as grounded-base) amplifier is one of three basic single-stage bipolar junction transistor (BJT) amplifier topologies, typically used as a current buffer or voltage amplifier.

When a transistor is used as a switch it is in?

Detailed Solution. When a transistor works as a switch it works in cut-off and saturation regions. In the cut-off state, both emitter-base junction and the collector-base junctions are reverse biased.

What are applications of CB configuration?

There are some applications of common base transistor amplifier which are given below, It is mainly used at high frequencies where low source resistance is common. It is used for impedance matching in circuits with very low output resistances to those with a high input resistance.