2. Draw the small-signal model and prove the dc gain and -3dB frequency of the circuit in Fig. 2. (10%)

5. For the circuit shown in Fig. 5, the input current is IREF that goes into N1. Applying the devices dimensions N1=(W/L), N2=2(W/L), N3=4(W/L), N4=8(W/L), N5=16(W/L), P1=(W/L), P2=2(W/L), where W and L are channel width and length, respectively. What are the currents for N3 and N5, respectively? (10%)

2. Draw the small-signal model and prove the dc gain and -3dB frequency of the circuit in Fig. 2. (10%)

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