Pass Transistors DC Response Logic Levels and Noise Margins Transient Response RC Delay Models Delay Estimation .Pass Transistors We have assumed source is grounded What if source 0? VDD – . pass transistor passing VDD VDD Vg = VDD – If Vs VDD-Vt, Vgs Vout = VDD – When Vin = VDD - Vout = 0 VDD – In between, Vout depends on Idsp transistor size and current Vin Vout – By KCL, must settle such that Idsn Idsn = |Idsp| – We could solve equations – But graphical solution gives more insight.
