For the op amp in Fig. 12.2, use the data from Problem 12.4 except use I_D5= 100 µA and |V_ov| = 0.1 V for all transistors. Assume all transistors operate in the active region with C_gs= 180 fF And C_gd= 20 fF.

(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.)

(c) Calculate the common-mode control gain a_cmc.

Data from Prob. 12.4:

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. 

Fig. 12.2:

VDD VBIAS M4 o Vo2 Vo1* M2 Vi2 M1 M5 -Vss