Question

For the amplifier circuits in Figs.3 and 7:

a. Write an expression for the output voltage, vo, in terms of the resistor symbols and the input voltage, vin.

---For the first circuit (Fig. 3), the feedback resistor is the series combination of R2 and R3. Use both of these resistor symbols in your expression.

-- For circuit 2 (Fig. 7), assume that vin = 5V and ignore potentiometer R1 and C3.

b. Using resistor values and input voltage amplitudes, calculate the peak-peak output voltage, vo (not just the peak voltage) and numerical voltage gain vo/vin.

--Calculate three numerical gains for the circuit 1 (Fig. 3) for R3 = 30 kΩ, 100 kΩ, and 0Ω

R2 D R3 10K 100K +15VT c1 T 0.1 uk R1 M 10K 15 V 1 C2 I 0.1 uF Fig. 3. Second op-amp circuit