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.DC Spice Analysis Quirk... Anyone Know How to Do This?

I want to do a DC sweep (.DC):

-3.6V to -1V (step size = 2.6V)

-1V to +2V (step size = (100/3)mV)

+2V to +7.2V (step size = 5.2V)

(Lots of data points around the "knee" :-)

That makes a list that PSpice barfs on, claiming "list too long".

Anyone know some gimmicks to get around that limitation?

Thanks! ...Jim Thompson

-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

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| 1962 | I love to cook with wine. Sometimes I even put it in the food.

Reply to
Jim Thompson
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This works, but a klutz...

Sim -3.6V to -1V (step size = 2.6V), export data to a .dat file

Sim -1V to +2V (step size = 40mV), export data to a .dat file

Sim +2V to 7.2V (step size = 5.2V)

Import data from first two sims to third sim.

Highlight waveform name, copy, then paste into a text file, result is a list of I/O pairs.

See...

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...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
      The only thing bipartisan in this country is hypocrisy
Reply to
Jim Thompson

use two voltage sources that add to give the desired effect in series?

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Reply to
Jasen Betts

The problem was the need for different step sizes in different regions. Reason: Feeding data to another application that can handle only 100 total data points.

"Solved" as posted at...

Subject: Re: .DC Spice Analysis Quirk... Anyone Know How to Do This? Date: Mon, 03 May 2010 17:31:10 -0700 Message-ID: ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
      The only thing bipartisan in this country is hypocrisy
Reply to
Jim Thompson

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