taik
Member level 3
For transistors in weak inversion, Rds=Va/Id where Va is the early voltage.
Does it mean we have to characterise the Va for transistors of different W? Va seems to be different for different W.
For e.g in designing a MOS Load Common Source amplifier where gain is Gm * Rds. I would need to find the required Rds of each transistor.
Also, in Spectre, when you do a Print->DC Operating Points, in the list of outputs displayed, is Ron = Rds?
Does it mean we have to characterise the Va for transistors of different W? Va seems to be different for different W.
For e.g in designing a MOS Load Common Source amplifier where gain is Gm * Rds. I would need to find the required Rds of each transistor.
Also, in Spectre, when you do a Print->DC Operating Points, in the list of outputs displayed, is Ron = Rds?