Exercise: Operational Amplifiers

Questions for: Operational Amplifiers

Refer to this figure. The purpose of R3 is

A:
for bias current compensation.
B:
for input offset voltage compensation.
C:
to set input impedance.
D:
to set input impedance and voltage gain.
Answer: A
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Refer to this figure. If the value of R1 decreases, the voltage gain will ________ and the input impedance will ________.

A:
increase, increase
B:
increase, decrease
C:
decrease, decrease
D:
decrease, increase
Answer: B
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In which of the following are operational amplifiers (op-amps) used?
A:
Oscillators
B:
Filters
C:
Instrumentation circuits
D:
All of the above
Answer: D
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