CMOS Inverter diagram
DC voltage transfer char
Regions of operation of NMOS and PMOS transistors, (mark in transfer char and table )
When both transistors are in saturation region, they have high and high output resistance(). Therefore high gain, leading to sharp transition in the transfer characteristic.
defines delay for output going from LOW to HIGH
defines delay for output going from HIGH to LOW
In general and are not same.
Therefore propagation delay, , is defined as
Rise time() and fall time() is defined as the time required for the signal to change from 10% to 90% of it’s steady state value.