Operational amplifier fundamental

In an ideal op-amp, which is not true?

• Open loop voltage gain is infinite

• Input resistance is infinite

• Slew rate is infinite

• CMRR is zero

The output of a particular Op-amp increases 8V in 12μs. The slew rate is

• 1. 90 V/μs

• 1. 0.67 V/μs

• 1. 1.5 V/μs

• 1. none of these

A certain noninverting amplifier has R_i of 1 kΩ and R_f of 100 kΩ. The closed-loop voltage gain is

• 100, 000

• 1000

• 101

• 100

A voltage follower

• 1. has a voltage gain of 1

• 1. is noninverting

• 1. has no feedback resistor

• 1. has all of these

Op-Amp is a ______ type of amplifier.

• Voltage

• Current

• Power

• Resistance

The closed-loop voltage gain of an inverting amplifier equal to

• The ratio of the input resistance to feedback resistance

• The open-loop voltage gain

• The feedback resistance divided by the input resistance

•  The input resistance

The ideal OP-AMP has the following characteristics.

• Ri=∞ ,A=∞ ,R0=0

• Ri=0 ,A=∞ ,R0=0

   

• Ri=∞ ,A=∞ ,R0=∞

   

• Ri=0 ,A=∞ ,R0=∞

   

An opamp has a slew rate of 5V/ S. the largest sine wave o/p voltage possible at a frequency of 1MHz is

• 10

• 5

• 20

• 5/2

If the capacitor is placed in the feedback path of the op amp circuit then the circuit can act as a

• integrator

• differentiator

• multiplier

• divider

The output voltage of an op-amp circuit is always ___ the level of the power supply

• larger than

• the same as

• smaller than

• None of the abov