Virtual Lab

Summer and Subtractor using Operational Amplifier 741.

Feedback

Post Test:

1. The output of the negative feedback Op - Amp is _________.

a) equal to the input
b) increases
c) fed back to the inverting input
d) fed back to the non - inverting input

2. 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

3. In Op-amp , the input stage is a ______.

a) differential amplifier
b) class B push-pull amplifier
c) CE amplifier
d) swamped amplifier

4. __________ is not an ideal op-amp characteristics.

a) Infinite voltage gain
b) Infinite bandwidth
c) Infinite output resistance
d) Infinite slew rate

5. _________ determines the output voltage of an op-amp

a) Positive saturation
b) Negative saturation
c) Both positive and negative saturation voltages
d) Supply voltage