1. For the inverting, summing amplifier shown, find the voltage gain relationship
(i.e., relationship between output vo and inputs va,
2. For the circuit of figure 3 in the lab:
a) Find the input impedance to the right of V1.
b) What is the output impedance of the amplifier circuit?
3. For the circuit of figure 4 in the lab:
a) What is the voltage gain of this circuit?
b) What is the input impedance of this circuit?
c) What is its output impedance of this circuit?