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
The output of a particular Op-amp increases 8V in 12µs. The slew rate is_______________?
(A) 90 V/µs
(B) 0.67 V/µs
(C) 1.5 V/µs
(D) none of these
Negative feedback_______________?
(A) increases the input and output impedances
(B) increases the input impedance and bandwidth
(C) decreases the output impedance and bandwidth
(D) does not affect impedance or bandwidth
The differential voltage gain of a differential amplifier is equal to RC divided by _______________?
(A) r’e
(B) r’e/2
(C) 2r’e
(D) RE
The common-mode voltage gain of a differential amplifier is equal to RC divided by _______________?
(A) r’e
(B) 2r’e
(C) r’e/2
(D) 2RE
The common-mode voltage gain is________________?
(A) smaller than differentail voltage gain
(B) equal to differential voltage gain
(C) greater than differential voltage gain
(D) none of the above
The input impedance of a differential amplifier equals r’e times________________?
(A) ß
(B) RE
(C) RC
(D) 2ß