FIGURE 4 shows an amplifier circuit. Write a short report on the operation and performance of the circuit. In completing the report you should:

- Explain the operation of the circuit and in particular the role of resistors R1 and R2.

- Build the circuit in PSpice and use it to determine:

(i) the quiescent value of Vout

(ii) the voltage gain for a 100 mV, 1 kHz , input signal

- Sketch the small-signal equivalent circuit of the amplifier and use it to estimate the voltage gain. Compare your answer with that of (ii) above.

- Attempt to calculate the quiescent value of Vout. Compare your answer with that given by the PSpice model. Try to explain any discrepancies.