Block Diagram Of Voltage Series Feedback Amplifier. Resistance amplifier is called so because output is voltage and input is current hence ratio gives us resistance gain. Different power amplifier stages are shown in the block diagram below.

The input signal i s is applied as a input i f is the feedback current and v o is the output voltage. This preview shows page 22 25 out of 99 pages. The block diagram of the voltage shunt feedback amplifier is shown below by which it is apparent that the feedback circuit is located in shunt by means of the output as well as the input.

Here the appropriate feedback topology is series shunt.

Figure 11 7 block diagram of a feedback voltage amplifier. V f is the feedback voltage and is given by. V f β v o æ 1 where β is the feedback ratio or reverse transmission factor. A f indicate relationship between v o and input current i s.