Oscar_nero
Newbie level 4
Good evening, I was designing a 2-stage OTA consisting of a folded cascode, as a first stage, followed by a common source, as a second stage. Almost all transistors, except one, work in saturation, then, between the first stage and the second, I inserted a common drain to perform a level-shifter, so that both transistors of the common source amplifier work in saturation. But the MOS of the pull-down network reaches the nominal value of the power supply and therefore the pull-up one does not turn on. How could fix it?