A simple common-mode feedback circuit for a folded-cascode opamp is presented in Fig. P6.57. If the bias currents of all transistors are and device lengths are , choose the device widths identically...

A simple common-mode feedback circuit for a folded-cascode opamp is presented in Fig. P6.57. If the bias currents of all transistors are and device lengths are , choose the device widths identically so that the output common-mode level is 0.8 V. Next, select to maximize the available output signal swing.