The question asks to find the threshold voltage for the case where two inputs switch simultaneously. What does this mean?

 

The question asks to find the threshold voltage for the case where two inputs switch simultaneously. What does this mean?

Please post the context, maybe the original question with a picture or formula or something.

 

Consider a CMOS NAND2 gate for the case where the two inputs switch simultaneously.
Assume \(k_p = k_n = 100 uA/V^2\). Derive an expression for \(V_{th}\).

It then notes that when both transistors are switching simultaneously, NMOSA is in saturation and NMOSB is in linear region.

What does "two inputs switch simultaneously" mean?

 

What does "two inputs switch simultaneously" mean?

You cannot get much clearer than that. It means both inputs are changing at the same time.

 

Would that affect the circuit differently compared to when the inputs are both static?

 

You can read this (pdf):

http://www.prenhall.com/howe3/microelectronics/pdf_folder/lectures/mwf/lecture17.fm5.pdf