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?

--
Best Regards,
Mike

 

[Jim Thompson]

On Mon, 26 Jan 2004 01:46:19 GMT, Active8
<mTHISREMOVEcolasono@earthlink.net,invalid> wrote:

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
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Active8]

On Sun, 25 Jan 2004 18:51:45 -0700, thegreatone@example.com said...

On Mon, 26 Jan 2004 01:46:19 GMT, Active8
mTHISREMOVEcolasono@earthlink.net,invalid> wrote:

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.

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.

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

...Jim Thompson

--
Best Regards,
Mike