申論題

5. The schematic and small-signal equivalent circuit of a two-stage op amp are shown in Fig. 5(a) and (b), respectively. Assume the magnitude of early voltage V_A is identical for all MOSFETs. The circuit parameters are specified as

(b) Based on the small-signal equivalent circuit in Fig. 5(b), derive the low-frequency gain, unity-gain frequency (ω_t). Also find the frequencies of the dominant pole, the second pole () and the zero (ω_z). [10%]