IV Semester-6

Common-mode gain signifies:

• Increase the noise

• Ability to reject common mode signals like noise, interference

• Increase the distortion

• All of the above

Slew rate is defined as the:

• Minimum rate of change of output voltage with time

• Moderate rate of change of output voltage with time

• Maximum rate of change of output voltage with time

• None of the above

Op-amp integrator uses:

• Capacitor as feedback element

• Resistor as feedback element

• Inductor as feedback element

• A simple wire as feedback element

The ramp voltage at the output of an op-amp integrator

• increases or decreases exponentially

• is constant

• is always increasing and never decreasing at linear rate

• increases or decreases at a linear rate

In an amplifier with negative feedback, the bandwidth is

• increased by a factor of β

• decreased by a factor of β

• increased by a factor of (1+Aβ)

• not affected at all by the feedback

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

• a ramp

• a triangular wave with dc bias

• a square wave

• both 1 and 2

If the value of resistor R_f in an averaging amplifier circuit is equal to the value of one input resistor divided by the number of inputs, the output will be equal to

• the average of the individual inputs

• the inverted average of the individual inputs

• the inverted sum of the individual inputs

• the sum of the individual inputs

The output signal of an op-amp is _____ out of phase in degree with its input signal connected to the inverting input terminal.

In the circuit shown, the output voltage, Vo, is

• +3V

• -3V

• +7V

• -7V

In the inverting amplifier , The resistance ROM is chosen as R1 || RF in order to

• Increase gain

• Reduce offset current

• Reduce offset voltage

• Increase CMRR