For the op amp in Fig. 12.2, use the device data and operating point from the first example in Section 12.4.1. Assume all transistors operate in the active region. 

(a) Find the element values in the two models for the output ports in Fig. 12.7.

(b) Find the element values in the two models for the input ports in Fig. 12.6. (The elements are capacitors.) Use C_gs = 180 fF and C_gd = 20 fF.

Fig. 12.2:

Fig. 12.7:

Fig. 12.6:

VDD VBIAS M4 o Vo2 Vo1* M2 Vi2 M1 M5 -Vss Vid Rod Vid Rod Vo2 2 Vo1 i,2 Roc Rod 4 acmVie (a) Rod||(-2Rp) Vo2 i,2 GmaVid GmcVic Roc Roc GmcVic (b)