Characteristics and applications of common base transistor amplifier

Characteristics:

There are some characteristics of common base transistor amplifier which are given below,

• It has very high output resistance.
• It has low input resistance.
• Its voltage gain is of the order of 1500.
• Its current gain is less than unity.
• Its power gain is of the order of 30 dB.
• Its input and output signals are in phase. i.e. there is no phase reversal between input and output signals.

Applications:

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.

Common base transistor amplifier