Assume the CMFB circuit of Fig. 6.34 has a 1.8-V power supply voltage, and that the current sources require 0.3 V across them in order to have all transistors remain in the active regions. Ignoring...

Assume the CMFB circuit of Fig. 6.34 has a 1.8-V power supply voltage, and that the current sources require 0.3 V across them in order to have all transistors remain in the active regions. Ignoring the body effect, what bias voltage should be used for the channel transistors to maximize signal swing? What is the maximum single-ended signal swing before the gain of the common-mode feedback circuitry goes to zero and why?