Current Series Feedback Amplifier Diagram. When the feedback circuit is allied in series through the o p however in parallel with the input then the o p impedance will be increased because of the parallel connection with the i p the i p impedance will be decreased. Therefore the inverting input has very low input impedance corresponding to zb.
The resistance parallel to the output denotes some of the output signal lost either by feedback mechanisms or because of internal losses. As the feedback circuit is connected in series with the output the output impedance is increased and due to the parallel connection with the input the input impedance is decreased. Current feedback amplifier block diagram an input voltage applied to the input is buffered by a unity gain voltage buffer gb which produces a current i through an impedance zb returning through the input.
When the feedback circuit is allied in series through the o p however in parallel with the input then the o p impedance will be increased because of the parallel connection with the i p the i p impedance will be decreased.
For the series series connection the configuration is defined as the output current iout to the input voltage vin. As the feedback circuit is connected in series with the output the output impedance is increased and due to the parallel connection with the input the input impedance is decreased. The resistance in series to the input indicates the effective impedance created by the amplifying circuitry. The below figure shows the block diagram of current shunt feedback by which it is evident that the feedback circuit is placed in series with the output but in parallel with the input.
