1. What are the connections to a basic
op-amp?
## Inverting input, noninverting input, output,
positive and negative supply voltages
2. Describe some of the characteristics
of a practical op-amp.
## A practical op-amp has very high input
impedance, very low output impedance, and very
high voltage gain.
3. List the amplifier stages in a typical
op-amp.
## Differential amplifier, voltage amplifier, and
push-pull amplifier
4. What does a differential amplifier
amplify?
## The difference between its two input voltages
5. A certain diff-amp has a differential
voltage gain of 2000 and a common-
mode gain of
0.2. Determine the CMRR and express it
in decibels.
CMRR =Av /Acm
=
