- #1
Shackman
- 22
- 2
I know how to find the static voltage transfer characteristics (output low voltage, input low voltage etc) for one input gates like an inverter from the graph of Vout v Vin.
My question is how do I apply this to gates with two inputs? These graphs have two curves by keeping one input constant and the fluctuating the other, and then vice versa.
Would the worst-case low noise margin become the smaller input low voltage minus the larger out low voltage and the worst-case large noise margin become the smaller output high margin minus the smaller input high margin?
Or would I find the noise margins as I would for one curve, and taking the smaller of the two?
My question is how do I apply this to gates with two inputs? These graphs have two curves by keeping one input constant and the fluctuating the other, and then vice versa.
Would the worst-case low noise margin become the smaller input low voltage minus the larger out low voltage and the worst-case large noise margin become the smaller output high margin minus the smaller input high margin?
Or would I find the noise margins as I would for one curve, and taking the smaller of the two?