Re: AC response
<snip> </snip> Hello Ganesan, I just thought of another, more direct way for you to do exactly what you want without messing with raw files. You need to use the .ac list... syntax; but why not put
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Tony Casey <tony@...>
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#46872
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Re: .savebias command commented out
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Rick
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#46871
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Re: .savebias command commented out
You had a floating resistor Routn1.. I connected it to outn and simulated.. I get the following skip file * .SAVEBIAS from circuit: * C:\Documents and Settings\ganesan\My
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Ganesan <dg1@...>
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#46870
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Re: .savebias command commented out
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Helmut Sennewald
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#46869
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.savebias command commented out
Hello All, I have been trying to use the .savebias command to grab a starting point for a rather lengthy transient simulation of a Linear Tech SMPS circuit. I believe I have the correct syntax:
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g.moberg <gregory.moberg@...>
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#46868
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Re: Potentiometer
--- Ganesan, E.A.Neonakis: Thanks, it worked. :-) -- JF
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John Fields <jbfields3@...>
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#46867
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Re: Potentiometer
It seems obvious to me that the results are the same. I think that in order to achove what you have in mind Ra should be {Rx} and Rb should be {500-Rx} You need only one .step and you do not need
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E.A.Neonakis
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#46866
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Re: Potentiometer
I tried .step param r1 490 10 -10 and R2 set to {500 - {r1}} output seems to be all-right... cheers AG
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Ganesan <dg1@...>
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#46865
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Re: AC response
Thanks A. Ganesan
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Ganesan <dg1@...>
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#46864
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Re: AC response
Both Octave and Scilab are freeware. Howard
By
Howard Hansen
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#46863
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Potentiometer
Hello, I'd like to simulate a 500 ohm pot by using a voltage divider: (View using a fixed-pitch font) CW | [Ra] | +---COM | [Rb] | CCW and stepping Ra from 499 ohms to 1 ohm in one ohm steps while
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John Fields <jbfields3@...>
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#46862
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TIA model
Hi all, I've started playing around with the awesome TIA model (TIA_universalopamp_shotnoise.asc) and have a couple of questions or perhaps statements that I'd like verified so I can understand I'm
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sdh314
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#46861
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Re: Caps smaller than 0.5 uF?
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Tony Casey <tony@...>
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#46860
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Re: Simple model for diffin-diffout amp
Thanks.. I model offset by dial ling some mismatch, so it includes temperature effects.. I can understand Microchip having poor models.. But TI, LTC and ADI have way too complex models for the job
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Ganesan <dg1@...>
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#46859
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Re: Caps smaller than 0.5 uF?
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Tony Casey <tony@...>
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#46858
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Re: Simple model for diffin-diffout amp
I'm not sure I understand How do you model offset? I model it by adding a DC source in series with the In+ or IN- gate. some value between 100uV and 10mV depending on the expected mismatch of the
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rjtalty
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#46857
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Re: Sensitivity Anlysis..
Hello AG, Maybe this will work. Let's assume you have the non modified divider on the schematic too. .step param TOL 0 0.01 0.1 .param RX=1k*(1+TOL) V1 100 0 {TOL} Then plot the following.
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Helmut Sennewald
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#46856
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Re: AC response
Thanks.. What freeware will meet my needs..? (I am a windows XP guy) cheers AG
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Ganesan <dg1@...>
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#46855
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Re: AC response
LTspice doesn't have any built in capability for merging data. However, you can export the data and then use a program like Octave, Scilab or Matlab to merge the data. The data would be represented as
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Howard Hansen
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#46854
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Re: Caps smaller than 0.5 uF?
Tony, You wrote, "I believe it is more efficient to use the parasitics included in LTspice inductors and capacitors than to have explicit discrete parasitic components, even though you lose the
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kungfu_phil
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#46853
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