Write the formula for closed loop voltage gain of inverting amplifier with feedback using open loop voltage gain and gain of feedback circuit.
A. AF= A/(1+AB)
B. AF= -A/(1+AB)
C. None of the mentioned
D. AF= -B/(1+AB)
Answer:A
Write the formula for closed loop voltage gain of inverting amplifier with feedback using open loop voltage gain and gain of feedback circuit.
A. AF= A/(1+AB) B. AF= -A/(1+AB) C. None of the mentioned D. AF= -B/(1+AB)
Explanation: The closed loop voltage gain of the amplifier is AF= -Ak/(1+AB), where k is a voltage attenuation factor. In addition to phase inversion, AF is k times the closed loop gain of the non-inverting amplifier where k<1.[/expand]