Differential amplifiers are used in ?
A. Instrumentation amplifiers
B. Voltage followers
C. Voltage regulators
D. Buffers
A. Instrumentation amplifiers
Operational Amplifier Circuits MCQs
Operational Amplifier Circuits MCQs. Multiple Choice Questions related to Operational Amplifier Circuits with Answers.
In the differential voltage gain & the common mode voltage gain of a differential amplifier are 48db & 2db respectively, then its common mode rejection ratio is ?
A. 23dB
B. 25dB
C. 46dB
D. 50dB
A. 23dB
For an ideal op-amp, which of the following is true ?
A. The differential voltage across the input terminals is zero
B. The current into the input terminals is zero
C. The current from output terminal is zero
D. The output resistance is zero
C. The current from output terminal is zero
When a step-input is given to an op-amp integrator, the output will be ?
A. A ramp
B. A sinusoidal wave
C. A rectangular wave
D. A triangular wave with dc bias
A. A ramp
How many op-amps are required to implement this equation Vo = V1 ?
A. 4
B. 3
C. 2
D. 1
D. 1
An amplifier using an opamp with slew rate SR=1v/sec has a gain of 40db. If this amplifier has to faithfully amplify sinusoidal signals from dc to 20KHz without introducing any slew-rate induced distortion, then the input signal level exceed ?
A. 795mV
B. 395mV
C. 795mV
D. 39.5mV
C. 795mV
Which of the following amplifier is used in a digital to analog converter ?
A. Non inverter
B. Voltage follower
C. Summer
D. Difference amplifier
C. Summer
A differential amplifier has a differential gain of 20,000. CMMR=80dB. The common mode gain is given by ?
A. 2
B. 1
C. 1/2
D. 0
A. 2
Assume that the op-amp of the fig. is ideal. If Vi is a triangular wave, then V0 will be ?
A. Square wave
B. Triangular wave
C. Parabolic wave
D. Sine wave
D. Sine wave
The approximate input impedance of the opamp circuit which has Ri=10k, Rf=100k, RL=10k ?
A. ∞
B. 120k
C. 110k
D. 10k
C. 110k