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Spice


Sci.Electronics.Design is a worldwide Usenet news group that is used to discuss various aspects of Electronic Circuit Design.

We found 770 threads matching "spice"

You are looking at page 1 of 20.

The most relevant threads are listed first

LT spice params

John Larkin - 2009-05-11 18:57:00
If I want to set Gmin, Abstol, or other LT Spice parameters, and have them travel with a circuit model, how can I do this? Is there some text thing I can include on a particular schematic that will set these params for Spice? The LT Spice Simulation/Control Panel/Spice window indicates that ...LT spice params

.s2p file in SPICE

DeMarco - 2008-06-25 16:35:00
Hello, I was given an S2P (2-Port S-parameter) file and I need to use it in a netlist in SPICE. I have only ever worked with SPICE models, not with recorded data in SPICE. I believe that my S2P file might be in a magnitude and phase angle format versus the decibel and phase (degrees) format th....s2p file in SPICE

Adjusting PC Hyperthreading for Spice Simulation

D from BC - 2009-01-20 14:44:00
I have an old single core puter using hyperthreading with XP. If I got this right.. XP thinks it's got 2 CPU's. One thread will only use 50% of CPU mips. So when I run spice, the CPU is only 1/2 working. The other half is for whatever...email,browser,OS stuff etc. I want spice to at full ...Adjusting PC Hyperthreading for Spice Simulation

Why so many FETs without SPICE models?

Joerg - 2009-08-18 20:23:00
Hurumph! Grumble, grumble ... Today was frustrating. Requested several SPICE models for larger FETs, all came back negative. From "Sorry, we don't have one" to "The customers are encouraged to roll their own". I mean, how do they engineer these things? Doesn't that sort of require major ...Why so many FETs without SPICE models?

SPICE Smoke Analysis

Guy Macon - 2009-02-09 19:38:00
JosephKK wrote: > > Jim Thompson wrote: > > > Several Spice variants have "smoke" outputs. ALL Spice variants can > > have macros written for them that do the same thing. > > Ok so far. Name some that have "smoke" outputs. Show me where to > find the macros. "Features/Benefits...SPICE Smoke Analysis

parser for spice macros?

Newsgroups - 2009-05-30 22:54:00
Is there a good tool that will review the contents of Spice macros? When I try to compile the Spice model for the AD8330, I get the useless warning "bad expression statement" in my old version of Tina Pro. No line number is given. I haven't found anything in the Tina FAQ that says what "b...parser for spice macros?

Re: Twin T circuit wanted

John Fields - 2010-06-09 17:02:00
On Wed, 09 Jun 2010 10:30:37 -0700, John Larkin wrote: > On Wed, 09 Jun 2010 11:31:31 -0500, John Fields > wrote: > > > On Tue, 08 Jun 2010 15:09:51 -0700, John Larkin > > wrote: > > > > > If I claimed that there was nitrogen in the air, he and > > > JF would hack a Spice simul...Re: Twin T circuit wanted

Re: wrapper around Spice

John Larkin - 2009-11-02 15:20:00
On Mon, 2 Nov 2009 06:48:27 -0800 (PST), MooseFET wrote: > On Nov 1, 4:16 pm, John Larkin > wrote: > > Suppose I have a fairly complex circuit that includes, say, 10 or 20 > > DACs to set up some parameters. I can simulate each DAC with a fixed > > voltage source. > > > > If I c...Re: wrapper around Spice

Re: PSpice model for rechargeable batteries

MooseFET - 2009-02-07 10:42:00
On Feb 7, 7:32=A0am, kumailb...@gmail.com wrote: > How can I get Orcad PSpice models and symbols for rechargeable > batteries like lead-acid, Ni-Cd batteries etc. Try typing "spice model battery" (without the quotes into google) that should find the spice model. I know people who have use...Re: PSpice model for rechargeable batteries

Re: Inverse Marx generator

krw@att.bizzzzzzzzzzzz - 2010-07-09 18:26:00
On Fri, 09 Jul 2010 07:56:02 -0700, Jim Thompson wrote: > On Fri, 09 Jul 2010 04:16:27 -0700, > "JosephKK" wrote: > > > On Thu, 08 Jul 2010 08:32:12 -0700, John Larkin > > wrote: > > > > > > > > What path? Understanding bog simple circuits? Stuff like this should > > > be seco...Re: Inverse Marx generator

Re: Twin T circuit wanted

John Larkin - 2010-06-09 13:30:00
On Wed, 09 Jun 2010 11:31:31 -0500, John Fields wrote: > On Tue, 08 Jun 2010 15:09:51 -0700, John Larkin > wrote: > > > If I claimed that there was nitrogen in the air, he and > > JF would hack a Spice simulation and prove me wrong. > > --- > You're being absurd, as usual, but it ...Re: Twin T circuit wanted

Re: Twin T circuit wanted

John Fields - 2010-06-10 08:27:00
On Wed, 09 Jun 2010 21:01:19 -0700, John Larkin wrote: > On Wed, 09 Jun 2010 16:02:57 -0500, John Fields > wrote: > > > On Wed, 09 Jun 2010 10:30:37 -0700, John Larkin > > wrote: > > > > > On Wed, 09 Jun 2010 11:31:31 -0500, John Fields > > > wrote: > > > > > > > On Tue, ...Re: Twin T circuit wanted

Migrate from SPICE MOSFET Level 6 to BSIM4

Daku - 2010-05-06 03:06:00
Could some SPICE guru please help ? I am using ngspice-20. I designed a phase frequency detector(2 D flip- flops and a NAND gate in feedback loop to reset the flip-flops) with SPICE level 6 NMOS and PMOS models, and simulation results were exactly as expected. I then modified the L and W values...Migrate from SPICE MOSFET Level 6 to BSIM4

LM675 spice model

yoyigomez@gmail.com - 2010-01-08 14:26:00
Hi All, I wonder if anyone can help me, I'm looking for a spice model for the National Semiconductor power operational amplifier LM675 Thanks in Advance, YY ...LM675 spice model

Re: Twin T circuit wanted

John Larkin - 2010-06-10 09:55:00
On Thu, 10 Jun 2010 07:27:47 -0500, John Fields wrote: > On Wed, 09 Jun 2010 21:01:19 -0700, John Larkin > wrote: > > > On Wed, 09 Jun 2010 16:02:57 -0500, John Fields > > wrote: > > > > > On Wed, 09 Jun 2010 10:30:37 -0700, John Larkin > > > wrote: > > > > > > > On Wed, ...Re: Twin T circuit wanted

Re: OT: 1,700 UK scientists back climate science

Jon Kirwan - 2009-12-27 23:07:00
On Sun, 27 Dec 2009 19:09:07 -0800, John Larkin wrote: > > I design all sorts of stuff that can't usefully be simulated, > especially with Spice. That's a lot more fun than siccing LT SPice on > opamps and 555's. I don't recall suggesting otherwise. Jon ...Re: OT: 1,700 UK scientists back climate science

Spice model for 6N139

OBones - 2009-07-18 17:06:00
Hello all, I'm looking for a SPICE model of the 6N139 and despite numerous hours searching on the web, I could not find one. If someone has such a model at hand, I would very much appreciate if I could get a copy of it. Thanks in advance Olivier ...Spice model for 6N139

Strange circuit behaviour through SPICE

powerampfreak - 2008-02-15 04:32:00
Hi all, I've done some poweramp circuits and wanted to check them in SPICE. I'm using Multisim ver.10. I was curious about the circuit's openloop gain and bandwidth and ran an "AC Analysis" in the simulation menu. I made the closedloop gain many times more the amount of openloop gain. The res...Strange circuit behaviour through SPICE

Re: Twin T circuit wanted

Jim Thompson - 2010-06-10 12:07:00
On Thu, 10 Jun 2010 09:01:11 -0700, John Larkin wrote: [snip] > > I think that most board-level designers use, and trust, Spice too > much. Given the cost and time for IC fab, it makes sense for IC > designers to use it to check their work before baking silicon. I don't > think that Wid...Re: Twin T circuit wanted

Re: Twin T circuit wanted

John Fields - 2010-06-10 10:09:00
On Thu, 10 Jun 2010 06:56:15 -0700, John Larkin wrote: > On Thu, 10 Jun 2010 07:27:47 -0500, John Fields > wrote: > > > On Wed, 09 Jun 2010 21:01:19 -0700, John Larkin > > wrote: > > > > > On Wed, 09 Jun 2010 16:02:57 -0500, John Fields > > > wrote: > > > > > > > On Wed, ...Re: Twin T circuit wanted

LT Spice ideal diode

John Larkin - 2010-04-04 11:02:00
I recall somewhere, maybe in this ng, the procedure for making an ideal diode in LT Spice. But I can't find it now. Help! The ideal diode should be a stock pulldown part. I wonder why it's not. And why can't I change the voltage of one of their pull-from-the-list zeners? That would sure...LT Spice ideal diode

Mac SPICE Help

Chris - 2010-03-17 17:12:00
I am messing around with Mac SPICE and I am trying to get it to plot output. I am trying to get it to print the output to an asciiplot, but I don't understand the error message. I have set the height and width variables, but to no avail. Asciiplot can't handle scale with length < 2 Thank...Mac SPICE Help

Re: a question about resistors in an arc experiment

John Larkin - 2009-01-20 00:43:00
On Tue, 20 Jan 2009 03:58:01 +0000, Mike Monett wrote: > John Larkin wrote: > > > Spice will allow perfectly noiseless positive-feedback states to > > persist forever, for want of a direction to go in, the equivalent of a > > pencil balanced on its point for a zillion years. One so...Re: a question about resistors in an arc experiment

LT Spice schmitt oscillator

John Larkin - 2009-10-08 17:46:00
Does anybody have a working LT Spice netlist for a simple schmitt inverter/R-C oscillator? I tried one using the library schmitt inverter and get obscure sim errors, and I don't understand the HELP stuff. What's the third pin in the corner for? Ground? Thanks, John ...LT Spice schmitt oscillator

Ideal -1 gain stage in spice?

Stephen-I-am - 2008-08-03 16:36:00
Hello. What's the easiest way to get a -1 gain stage in SPICE? Thanks. StephenB ...Ideal -1 gain stage in spice?

Op amp noise models in SPICE

Phil Hobbs - 2008-06-23 11:55:00
I generally don't use op amp SPICE models, because IME when the results aren't obvious, they're usually wrong. so I'm kind of out of date on this point. Do manufacturers' op amp models account properly for noise and input capacitance these days? Which ones are good/bad/indifferent? Tha...Op amp noise models in SPICE

Re: cmos 74hc debounce pull up resistors

usao - 2008-02-26 16:51:00
Looks interesting. I can see how the resistor would only be accross both rails for a short time spike, otherwise it would be neutral, with a logic 0 (or logic 1) on both sides of the resistor while the switch is stable. This avoids the static pull-up resistor from pulling current on the leg whi...Re: cmos 74hc debounce pull up resistors

Diodes for boost converter SPICE parameters

Daku - 2010-07-01 02:16:00
Could some electronics guru provide names and URLs for SPICE parameters for diodes for DC-DC boost converters ? I designed a simple DC-DC boost converter with 3x output, using Schottky diodes MBR340. I am interested in other alternatives. Thanks in advance. ...Diodes for boost converter SPICE parameters

arbitray inpedance vs frequency spice model

mook johnson - 2010-01-06 21:40:00
Is there a SPICE model that allows to set to define a two pin device to have arbitraty impedance vs frequency? I measured the impedance of a device that has a odd impedance. I'd like to model that without making a lumped circuit with R,L,C. Any of you guys know of such a thing or dealt wi...arbitray inpedance vs frequency spice model

Re: Inverse Marx generator

John Larkin - 2010-07-09 19:19:00
On Fri, 09 Jul 2010 17:26:33 -0500, "krw@att.bizzzzzzzzzzzz" wrote: > On Fri, 09 Jul 2010 07:56:02 -0700, Jim Thompson > wrote: > > > On Fri, 09 Jul 2010 04:16:27 -0700, > > "JosephKK" wrote: > > > > > On Thu, 08 Jul 2010 08:32:12 -0700, John Larkin > > > wrote: > > > > > ...Re: Inverse Marx generator

Anybody seen a spice model for a laser diode?

Michael - 2008-01-26 08:29:00
Hi there - I was thinking about trying to design a laser driver over the weekend. Unfortunately, I can't seem to find a spice model for a laser diode, putting a bit of a squabash on that plan. Anybody know where I can find one? Ideally I'd find one for a very normal ~5mw red laser diode - like...Anybody seen a spice model for a laser diode?

Re: PSpice and LTSpice

Marte Schwarz - 2010-01-06 18:00:00
Hi Jim, > Above is a NETLIST. > > Below is a SCHEMATIC. > Also, I am SURE that there is some way to import a netlist into > LTspice _without_ having to translate it to a schematic. > > LTspice users? I'm not a SPICE expert but this is very easy. Insert a Text as Spice directive ...Re: PSpice and LTSpice

[Help!!] P-spice Error --> Time step too small..

jason KIM - 2008-03-30 21:03:00
hi, all I'm lcd engineer who design the electric circuit. recently, i use spice to pridect my circuit and i'm in trouble now. there is an error -"Time step too small" to solve the problem, I add some options. The options are: -. ITL4=100 -. RELTOL=0.01 - change the time step :...[Help!!] P-spice Error --> Time step too small..

2SK3372 Spice Model ??

Jim Thompson - 2009-07-17 11:11:00
Anyone have a 2SK3372 (JFET) Spice Model? Thanks! ...Jim Thompson -- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Syst...2SK3372 Spice Model ??

Proprietary SMPS design tools, what for?

Joerg - 2009-09-01 12:09:00
Today I and probably others received the announcement of the umpteenth SMPS "iteractive design simulator", EDesign Studio or whatever from ST. I am not even going to try it. I've hung up on those things a long time ago, after WebBench from National flagged the third of my designs as "cannot ...Proprietary SMPS design tools, what for?

A question for Mike Monett.....

2008-12-30 14:00:00
Mike: I found the following reference on the Microcap spice simulator website but the link to the paper is dead. Are you able to make this reference available? SPICE Analysis of Crystal Oscillators - Michael R. Monett This paper describes a simple method of starting a high-Q crystal os...A question for Mike Monett.....

SPICE accuracy?

Vladimir Vassilevsky - 2009-04-13 19:40:00
Suppose there is a nonlinear circuit with the vastly different time constants. An example could be RF oscillator; the time scale of events is a fraction of RF period; whereas the RC bias time constant is somewhat 10M times slower then the period. When simulating this circuit in *.SPICE, i...SPICE accuracy?

Re: Twin T circuit wanted

John Larkin - 2010-06-09 21:19:00
On Wed, 09 Jun 2010 20:40:37 -0400, Phil Hobbs wrote: > John Larkin wrote: > > On Wed, 09 Jun 2010 11:31:31 -0500, John Fields > > wrote: > > > > > On Tue, 08 Jun 2010 15:09:51 -0700, John Larkin > > > wrote: > > > > > > > If I claimed that there was nitrogen in the air, ...Re: Twin T circuit wanted

SPICE opamp model with adjustable slew-rate

2008-03-11 10:09:00
Hi. I want to examine the effect of limited slew-rate (real) opamps that I use in diode rectifiers as part of asynchronous amplitude demodulators. Therefor I'm searching for a (spice) opamp model with adjustable slew rate. The ideal model "opamp" of PSpice has adjustable Gain-Bandwidth- ...SPICE opamp model with adjustable slew-rate

What meaning are these terms of modeling in spice simulation?

readeraz - 2008-03-04 22:42:00
There are some terms of transformer modeling in spice simulation, like below, .SUBCKT 1TO1#0 1 2 3 4 VISRC 9 4 DC 0V FCTRL 6 2 VISRC 1E+0 EVCVS 8 9 5 2 1E+0 RPRI 1 7 1E-1 RSEC 8 3 1E-1 LLEAK 7 5 1E-6 LMAGNET 6 5 1E-6 .ENDS 1TO1 I hope to know, what the terms of VISRC and FCTRL are?...What meaning are these terms of modeling in spice simulation?
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