.DC Spice Analysis Quirk... Anyone Know How to Do This?
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From: Jim Thompson on 3 May 2010 19:51 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 http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
From: Jim Thompson on 3 May 2010 20:31 On Mon, 03 May 2010 16:51:37 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)On-My-Web-Site.com> wrote: >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 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... http://analog-innovations.com/SED/Data_Point_Merge_TYP.pdf ...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
From: Jasen Betts on 5 May 2010 08:00 On 2010-05-03, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)On-My-Web-Site.com> wrote: > 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? use two voltage sources that add to give the desired effect in series? --- news://freenews.netfront.net/ - complaints: news(a)netfront.net ---
From: Jim Thompson on 5 May 2010 10:18
On 5 May 2010 12:00:44 GMT, Jasen Betts <jasen(a)xnet.co.nz> wrote: >On 2010-05-03, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)On-My-Web-Site.com> wrote: >> 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? > >use two voltage sources that add to give the desired effect in series? > 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: <h1qut5lb34lcu240fq98se8tqpe24fppja(a)4ax.com> ...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 |