The ac schematic of a shunt-shunt feed-back amplifier is shown in Fig. 8.48. All transistors have I_D= 1 mA, W/L = 100, k' = 60 μA/V², and λ = 1/(50 V).

(a) Calculate the overall gain v_o/i_i, the loop transmission, the input impedance, and the output impedance at low frequencies. Use the formulas from two-port analysis.

(b) If the circuit is fed from a source resistance of 1k in parallel with ii, what is the new output resistance of the circuit?

Transcribed Image Text:

M1 5 k2 5 k2 5 k2 M2 Mз 10 k2