PSpice - Gates - worst-case output level question

[Active8]

Hi:

I'd like to know how to get a gate sim to output other values like
Vol max and Voh min and even sweep the levels.

How do you do that?

 

[Jim Thompson]

Hi:

I'd like to know how to get a gate sim to output other values like
Vol max and Voh min and even sweep the levels.

How do you do that?

I think the digital simulator simply does delay testing.

To do VOL-max and VOL-min requires ANALOG simulation ;-)

I do it all the time at the device level.

Over the years I've redesigned *many* Motorola/ON-Semi 'HC parts... a
job strictly for an ANALOG designer ;-)

...Jim Thompson

 

[Active8]

I think the digital simulator simply does delay testing.

Looks that way so far.

To do VOL-max and VOL-min requires ANALOG simulation ;-)

^^^^^ Voh-min

It's mixed analog and digital. The digital device has an analog
interface and that interface may or may not be tweakable.

I do it all the time at the device level.

And that's what I'll end up doing if nothing else turns up. A
voltage source is all that's really needed for this case, but give
me a hint, please. What would you do if you needed to sweep a CMOS
output over its tolerance range? E.g., Voh = Vdd - 0.7 min Vol = .6
max.