Book Recommendation

Started by Jim Thompson in sci.electronics.design2 years ago

You are going to run into difficulty trying to find a book about how to use Spice, particularly LTspice. I recommend this OLD book... ...

You are going to run into difficulty trying to find a book about how to use Spice, particularly LTspice. I recommend this OLD book... Even though it's labeled "PSpice", it's actually NOT-PSpice-specific, it's about FUNDAMENTALS... applicable


orcad pspice complains about simulation server

Started by Jean-Pierre Coulon in sci.electronics.design2 weeks ago 4 replies

I have been using orcad pspice demo version 9.1 for several years. Since today, when I try to open a .CIR file it says: "failed to connect to...

I have been using orcad pspice demo version 9.1 for several years. Since today, when I try to open a .CIR file it says: "failed to connect to the pspice simulation server" I can't even view it. This is before I try to simulate. I limit myself to .CIR files that I have already simulated. Am I the only one? Does a demo software really need to connect to a server? Then did this server ...


UC3825 help with Pspice

Started by Waldes in sci.electronics.design11 years ago 1 reply

Hi all! I need simulation file for this IC. If someone has it, please share with me. I found here some files for UC3843, UC3842, but they...

Hi all! I need simulation file for this IC. If someone has it, please share with me. I found here some files for UC3843, UC3842, but they are current mode, and I want something with voltage mode for flyback converter, which has voltage regulated from 30V to 300V. So I will be gratefull for model UC3825 or information how to simulate in Pspice PWM modulator with Soft Start and limit max cur...


PSpice Ratiometric Simulations

Started by Bob Penoyer in sci.electronics.design8 years ago 17 replies

This is not a school question. It's a real-life question. Suppose three resistors are connected to a common node. The other end of each...

This is not a school question. It's a real-life question. Suppose three resistors are connected to a common node. The other end of each resistor is connected to a voltage source. So V1 is connected to R1, V2 is connected to R2, and V3 is connected to R3. The opposite terminal of each resistor connects R1, R2, and R3 together. I want to use PSpice Monte Carlo to observe the voltage at t...


Ping Charlie Edmondson and Other Early PSpice Team members

Started by Jim Thompson in sci.electronics.design7 years ago 1 reply

From the LTspice List... "analogspiceman" analogspiceman !!PING!! to Jim Thompson, Mike Engelhardt and anyone else who might posses...

From the LTspice List... "analogspiceman" analogspiceman !!PING!! to Jim Thompson, Mike Engelhardt and anyone else who might posses historical insider knowledge regarding PSpice... I am in the process of updating the depth and accuracy of the historical SPICE page over at the LTwiki: http://ltwiki.org/?title=LTspice_Genealogy_-_The_Heritage_of_Simulation_Ubiquity A while ago I ...


PSpice Netlisting/Template Trick

Started by Jim Thompson in sci.electronics.design7 years ago 7 replies

Just discovered (or re-remembered :-), in PSpice... To just have the color of an LED showing in the schematic (I hate over-klutzy drawings), I...

Just discovered (or re-remembered :-), in PSpice... To just have the color of an LED showing in the schematic (I hate over-klutzy drawings), I just enter color and the template collects the model name... Template= X^@refdes %1 %2 My\@COLOR\@LED COLOR=RED LED=LED ...Jim Thompson -- | James E.Thompson | men...


SPICE model for lead acid cell

Started by Daku in sci.electronics.design9 years ago 1 reply

Could some electronics guru please direct me to a SPICE model for a lead acid cell. I understand that PSpice comes with a model, but I do not...

Could some electronics guru please direct me to a SPICE model for a lead acid cell. I understand that PSpice comes with a model, but I do not use PSpice, and I hear that the library is encrypted.


PSpice worst case simulation

Started by Joerg in sci.electronics.design9 years ago 36 replies

Hi Folks, Reached an end of a rope here: How do you make a worst case simulation in PSpice (or even Monte Carlo for that matter) properly find...

Hi Folks, Reached an end of a rope here: How do you make a worst case simulation in PSpice (or even Monte Carlo for that matter) properly find the extremes for an opamp offset voltage and input bias current? For example, for the opamp we have: VOS: Offset voltage VOS_DIST: Distribution, I assume VOS_NTOL: What gets entered here? VOS_PTOL: ... and here? If I enter 7mV or whatever f...


TUTORIAL - Example 1, Using Femm to Calculate Component Values of Simple Microstrip to use in LTspice/PSpice

Started by RobertMacy in sci.electronics.design5 years ago 31 replies

I offer to share with you a TUTORIAL but don't know how to get it into your hands. The TUTORIAL is about 15kB, zipped, and describes the...

I offer to share with you a TUTORIAL but don't know how to get it into your hands. The TUTORIAL is about 15kB, zipped, and describes the step-by-step process of using FREE femm 4.2 to analyze a simple PCB structure to calculate values to then use in circuit simulation, LTspice/PSpice. The sequence can be modified for use in analyzing really complex structures, structures where th...


PSpice Gain/phase model for S/H and quantization in software loop (digital SMPS)

Started by Klaus Kragelund in sci.electronics.design8 years ago 4 replies

Hi I have implemented a digital SMPS in a Cortex M3 controller. The feedback of the SMPS is done using the TL431 and opto coupler...

Hi I have implemented a digital SMPS in a Cortex M3 controller. The feedback of the SMPS is done using the TL431 and opto coupler feedback. The feedback is sampled by the ADC at 10kSa and the sampled values controls the duty-cycle of the SMPS. It is stable, but I would like to simulate the loop in PSPice. The ADC has sample and hold along with quantiziation that affects the gain/phase. Th...


AN: New Spice Model Posted to my Website

Started by Jim Thompson in sci.electronics.design5 years ago 1 reply

New Spice Model Posted to my Website: Every Spice Simulator has their own proprietary way of implementing digital functions... LTspice Digital...

New Spice Model Posted to my Website: Every Spice Simulator has their own proprietary way of implementing digital functions... LTspice Digital Primitives don't play on PSpice, PSpice Digital Primitives don't play on LTspice... neither play anywhere else. Thus I have rolled my own Spice Model for the venerable HC4538 one-shot that uses universal behavioral modeling for the digital elemen...


OT: Remote Access.

Started by Jim Thompson in sci.electronics.design5 years ago 31 replies

When I'm at my desk I access my Laptop and two PC's via a KVMP switch. With the weather as nice as it is here in the Springtime of...

When I'm at my desk I access my Laptop and two PC's via a KVMP switch. With the weather as nice as it is here in the Springtime of the Southwest (


Are TI Pspice models encripted?

Started by Anonymous in sci.electronics.design4 years ago 67 replies

I was going to try to load the TI TPS54335 spice model into LTspice but it looks encrypted. Is TI encrypting its spice models...

I was going to try to load the TI TPS54335 spice model into LTspice but it looks encrypted. Is TI encrypting its spice models now? http://www.ti.com/product/tps54335 Thanks


Stability of older Orcad/PSpice combos?

Started by Joerg in sci.electronics.design9 years ago 148 replies

Hello Folks, On my PC this software crashes often and hard and needs too many re-installs. It slows down one project to a crawl here and that...

Hello Folks, On my PC this software crashes often and hard and needs too many re-installs. It slows down one project to a crawl here and that needs to get done. I could use older versions as long as my client can read the files into 16.3. Question: In your experience, what was a relatively stable (as in "not many crashes") version I could try to go back to? The license should allow a do...


Handling HSpice Files

Started by Jim Thompson in sci.electronics.design6 years ago

HSpice2PSpiceNewEdit.pdf, on the Simulation Tools & Macros Page of my website, has been updated with some new library format...

HSpice2PSpiceNewEdit.pdf, on the Simulation Tools & Macros Page of my website, has been updated with some new library format information. While the title says PSpice, the techniques apply to all Berkeley Spice derivatives... including LTspice ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovati...


Any of you use Multisim?

Started by Jim Thompson in sci.electronics.design5 years ago 10 replies

Any of you use Multisim? Can Multisim handle PSpice/LTspice style behavioral expressions... GDC_I1 X2 VN VALUE...

Any of you use Multisim? Can Multisim handle PSpice/LTspice style behavioral expressions... GDC_I1 X2 VN VALUE {(1+TANH(2.2/0.1*(V(X2,VN)-0.5)))/2*45u} Or can it only handle B-sources? ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | ...


OT: PERL

Started by Jim Thompson in sci.electronics.design8 years ago 26 replies

Is there a recommended "PERL for Dummies" book? All I need it for is searching and replacing mixed text and numeric strings using a text editor...

Is there a recommended "PERL for Dummies" book? All I need it for is searching and replacing mixed text and numeric strings using a text editor (UltraEdit, editing PSpice libraries). I have "Learning Perl" by Randal Schwartz, but it's way too deep into stuff I don't need. I guess what I need is a "cookbook" if such exists. Suggestions? ...J...


LTspice XVII INI File?

Started by Jim Thompson in sci.electronics.design2 years ago 3 replies

Facing the realities that I'm going to have to deal with LTspice, I've decided to become the expert ;-) Noting that the INI file...

Facing the realities that I'm going to have to deal with LTspice, I've decided to become the expert ;-) Noting that the INI file contains: SymbolSearchPath= LibrarySearchPath= Does anyone know if these fields can have multiple entries/directories, perhaps separated by ";", as in PSpice? This would be a handy feature and would somewhat obviate the current restriction of schematic an...


"Random" Circuit Needed.

Started by Jim Thompson in sci.electronics.design4 years ago 149 replies

For a simulation situation I need a random number generator with a twist... What I need to simulate is a "random" selection of one-of-16...

For a simulation situation I need a random number generator with a twist... What I need to simulate is a "random" selection of one-of-16 outputs. Clock "speed" is 12.5kHz ;-) Built of 74HCxx parts is preferred... I have a full ensemble of those device in my PSpice library. Thanks in advance. ...Jim Thompson -- | James E.Thompson ...


Oscillator buffer

Started by o pere o in sci.electronics.design8 years ago 38 replies

The thread related to large signal PSpice models and an emitter follower comes from the following problem: I have an oscillator that should...

The thread related to large signal PSpice models and an emitter follower comes from the following problem: I have an oscillator that should drive a digital part of the system. In short, what is the best way to achieve this? My first attempt has been a common base Colpitts oscillator that gives a signal riding on the +Vcc rail. This has been AC coupled to a 74AC gate biased to the poin...