When a differential amplifier is operated single-ended, _______________?

A. The output is grounded
B. One input is grounded and signal is applied to the other
C. Both inputs are connected together
D. The output is not inverted

With zero volts on both inputs, an OP-amp ideally should have an output _______________?

A. Equal to the positive supply voltage
B. Equal to the negative supply voltage
C. Equal to zero
D. Equal to cmrr

In the common mode, _______________?

A. Both inputs are grounded
B. The outputs are connected together
C. An identical signal appears on both the inputs
D. The output signal are in-phase

A differential amplifier______________?

A. Is a part of an op-amp
B. Has one input and one output
C. Has two outputs
D. Answers (a) and (b)

The tail current of a differential amplifier is_______________?

A. Half of either collector current
B. Equal to either collector current
C. Two times either collector current
D. Equal to the difference in base currents

A certain inverting amplifier has a closed-loop voltage gain of 25. The Op-amp has an open-loop voltage gain of 100,000. If an Op-amp with an open-loop voltage gain of 200,000 is substituted in the arrangement, the closed-loop gain________________?

A. Doubles
B. Drops to 12.5
C. Remains at 25
D. Increases slightly

The use of negative feedback ________________?

A. Reduces the voltage gain of an op-amp
B. Makes the op-amp oscillate
C. Makes linear operation possible
D. Answers (a) and (b)

A certain OP-amp has bias currents of 50 µA. The input offset current is_________________?

A. 700 na
B. 99.3 μa
C. 49.7 μa
D. None of these

If the feedback resistor in Q15 (above question) is open, the voltage gain ____________?

A. Increases
B. Decreases
C. Is not affected
D. Depends on ri

A voltage follower _____________?

A. Has a voltage gain of 1
B. Is noninverting
C. Has no feedback resistor
D. Has all of these