Home | | Electronic Circuits II | Output Impedance of Emitter Follower

Chapter: Electronic Circuits - Feed Back Amplifiers

| Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail |

Output Impedance of Emitter Follower

The output impedance of a circuit is the impedance that the circuit offers to the load.

Output Impedance of Emitter Follower

 

The output impedance of a circuit is the impedance that the circuit offers to the load. When load is connected to the circuit, the output impedance acts as the source impedance for the load. Fig.1.15 shows the circuit of emitter follower. Here Rs is the output resistance of amplifier voltage source. It can be proved that the output impedance

Zout of the emitter follower is given by :


In practical circuits, the value of RE is large enough to be ignored. For this reason, the output impedance of emitter follower is approximately given by :





Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail


Copyright © 2018-2020 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.