Operational Amplifier Basics. 1st year electronics

1. Operational Amplifier Basics
Revision Question 1
Figure 1 shows the representation of a voltage amplifier with
a fraction β of the output fed back to the input. Derive an
expression for the closed-loop voltage gain,
Gv = Vout/Vin in terms of the open-loop voltage gain, Avo and
the feedback fraction β.

2. Operational Amplifier Basics
Revision Question 1
vout  AVO(vin   vout )
vout  AVOvin  AVO vout
vout  AVO vout  AVOvin
vout (1  AVO )  AVOvin
vout AVO AVO 1
Gv    
vin (1  AVO ) AVO 