題組內容

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 VA is identical for all MOSFETs. The circuit parameters are specified as6167d46076a20.jpg6167d40acb11b.jpg6167d42845794.jpg

(c) It is found that ωt = ωz fork = 1. Calculate the phase margin of the op-amp for k= 2.[10%]