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OP-AMP Circuits

OP-AMP Circuits



An OPAMP has a slew rate of 5 V/μ S .The largest sine wave O/P voltage possible at a frequency of 1 MHZ is_______________?
0

A. 10 volts
B. 5 volts
C. 5/ volts
D. 5/2 volts

A 741-Type OP-AMP has a gain-bandwith product of 1MHz. A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit -3db bandwidth of______________?
0

A. 50KHz
B. 100KHz
C. 1000/17KHz
D. 1000/7.07KHz

A differential amplifier is invariably used in the i/p stage of all op-amps. This is done basically to provide the op-amps with a very high______________?
0

A. CMMR
B. Bandwidth
C. Slew rate
D. Open-loop gain

Assume that the op-amp of the fig. is ideal. If Vi is a triangular wave, then V0 will be______________?
0

A. Square wave
B. Triangular wave
C. Parabolic wave
D. Sine wave

A differential amplifier has a differential gain of 20,000. CMMR=80dB. The common mode gain is given by_______________?
0

A. 2
B. 1
C. 1/2
D. 0

Which of the following amplifier is used in a digital to analog converter?
0

A. Non inverter
B. Voltage follower
C. Summer
D. Difference amplifier

When a step-input is given to an op-amp integrator, the output will be______________?
0

A. A ramp
B. A sinusoidal wave
C. A rectangular wave
D. A triangular wave with dc bias

For an ideal op-amp, which of the following is true?
0

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

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________________?
0

A. 23dB
B. 25dB
C. 46dB
D. 50dB

Differential amplifiers are used in______________?
0

A. Instrumentation amplifiers
B. Voltage followers
C. Voltage regulators
D. Buffers



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