A famous textual circuit simulator with a number of graphic front-ends

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LTSpice Level 2 Simulation CMOS follower

I'm trying to make a level 2 simulation of a voltage buffer made by a CMOS circuit: For this, I have been told to use level 2 CNM25 technology Spice models for the transistors, and I have been ...
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1answer
25 views

How to simulate an AC line filter in LT Spice

I'm fairly new to LT spice and am trying to simulate an AC line filter, but it keeps giving me the error K1: coupling to shorted out (ignored) inductor L1. What am I doing wrong? Here's the circuit: ...
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1answer
56 views

How to design a SPICE model from data sheet?

I am new to SPICE simulation and I am looking for spice model file of LTC 1065 data sheet can be found here here. I searched a lot on Google but I could not find ...
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20 views

HSpice optimization of parameters not achieving desired value

I use HSpice. I have a spice netlist wherein the TPHL and TPLH of my circuit should be less than 3%. I use the Spice optimization parameter as indicated here ...
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1answer
43 views

Is there a spice directive to export waveform data in LTspice?

http://www.linear.com/solutions/1815 The above web-page explains how to export the waveform data to a text file. You basically run the LTspice simulation, clicking on the waveform window, go to ...
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26 views

Error on SPICE simulation in Tanner

I am trying to make a simple CMOS NOT gate using Tanner. I have made schematic using S-Edit. On simulation, A error is being thrown. ...
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1answer
29 views

making Tphl and Tplh equal

Let's say we have the following netlist ...
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2answers
206 views

How can I simulate a bridged output of a speaker at 8 ohms?

Following on from my previous post on a single 5V rail amplifier, I'm trying to simulate a bridged output op amp set up to drive an 8 0hm load. One of the solutions was: Use a bridge output. This ...
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1answer
49 views

Verilog to spice using v2s- specificing the port order in the command v2s

I was trying to convert from verilog netlist into a spice netlist using the option v2s. Can I specify the pattern in which the ports will be arranged in my ...
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39 views

SPICE analysis of a ring modulator

I'm designing (for fun and understanding) a simple 100 MHz BPSK modulator. I've found a simple implementation (from http://en.wikipedia.org/wiki/Ring_modulation). Haven't worried about pulse shaping ...
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2answers
83 views

ngspice, malloc: internal error can't allocate -8 bytes

I am new to ngspice and trying to simulate my first circuit. I have posted my spice.net and my simulation.cmd below with a picture of my schematic. When I run the simulation I get the error message: ...
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1answer
37 views

Inverter not showing the right output in HSPICE

This is the code snippet apart from the usual headers in the rest of the file: ...
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12 views

Format of node identifier in ngspice

I am writing a script which generates ngspice netlists from an application data-structure. I am not sure if I can have _ in node names. I looked at documentation ...
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1answer
31 views

How to comment at the end of a command in LTspice?

Commenting in a spice file is quite straightforward. Start a line with an * and the entire line is a comment. The first line is ...
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64 views

How to model Texas Instruments UCC28700?

I'm using Multisim in an attempt to simulate a flyback supply design reference by Texas Instruments that makes use of a voltage controller - the UCC28700. Multisim has no SPICE model natively nor does ...
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1answer
113 views

LTspice: How to convert .asc file to netlist?

Using LTspice I can create .asc files which contain the information about my circuit. Is there a way to convert this information to a netlist? I am looking for a ...
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233 views

Wien bridge oscillator LTSPICE

im looking for a good oscillator to implement in a circuit and I was trying to simulate a Wien Bridge oscillator in LTSPICE but I have no success as my output is always 0 V. Is there a special ...
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3answers
458 views

Is there a portable alternative to LTspice? [closed]

I am constantly on the move and come across many computers to which I have access and which have some version of Windows installed. I was wondering if there's a portable alternative to LTspice (or if ...
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1answer
88 views

From curves to SPICE model

In the lab I measured the Vgs x Id and Vds x Id curves of a MOSFET transistor (actually, the CD4007 IC that has 3 PMOS and 3 NMOS transistors within). How would I go into turning this data into a ...
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170 views

NMOS CS Amplifier PSpice Simulation Question

I have a rather peculiar question. I am attempting to recreate the circuit below (from one of my labs) of a Common-Source Amplifier design with a bypassed Source Resistance in PSpice. It has the ...
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31 views

Parametric sweep batch mode in Gnucap

When doing simulations in Gnucap, batch mode, how can I do a parametric sweep? The sweep command works in interactive mode, but when done in batch mode with ...
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1answer
186 views

How to model IR LED Diode in SPICE [duplicate]

How does one model an IR diode in SPICE? Specifically, the TIL38. Datasheet here: http://www.supermoduul.com/PDF/TIL38.pdf I get it that Is needs to be found - ...
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1answer
86 views

How to fit MAX941 macromodel to LTSpice “opamp2”?

I am new to adding models to LTSpice. I have successfully added OPA350 from TI, but with MAX941 from Maxim Integrated I get some errors due to the LTSpice "opamp2" model does not have the same amount ...
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226 views

Trying to use INA2128 op-amp (or INA128, a similar model) in Proteus ISIS

I'm trying to simulate an EMG-signal amplifier that I got the schematic for from one of my seniors at my university. The signal strength varies from 3mV to 10mV, and the amplifier takes it up to 5V. ...
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2answers
122 views

How to break components in SPICE?

I've been learning SPICE over the past few days, using the LTSPICE program. One thing that just escapes me, is how exactly do we know when a component's absolute maximum ratings have been exceeded? ...
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1answer
40 views

How to get values of voltage and current at different times ,using pspice?

This is probably a really trivial question nevertheless it has had me confused for a while. I'm trying to solve a circuit using PSpice and for that matter I need to get the values of different node ...
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1answer
69 views

Are some implementations of SPICE more accurate than others?

Just like the title says. Is there one single SPICE back-end that's the same for different versions of SPICE, or are the different versions performing different simulations?
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109 views

NgSPICE Too Few Parameters Error

I have been trying to simulate a flash ADC in NGSPICE using the gEDA package. I had used the 74148 8 to 3 encoder and the UA741 OpAmp in the model. I had also included the requisite spice model files. ...
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93 views

spice representation for mechanical problems

As a mechanical engineer, for my work, I need to compute some displacements which are represented as a summation of frequency dependent admittances on a structural system and I would like to use this ...
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3answers
189 views

Singular error when putting a current source in series with a capacitor (ngspice)

I am getting singular errors when I simulate a current source in series with a capacitor with the following .cir file: ...
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1answer
60 views

gnetlist Cannot Find Symbol

I am trying to use gschem/gnetlist/ngspice to do some circuit simulations. I have a subcircuit schematic and have created a symbol. I am able to add the symbol into the higher level schematic in ...
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2answers
101 views

Linux Circuit Software To Calculate Power Dissipation

I am a bit new to this whole circuit simulation software, so I was hoping someone could share their years of experience with me to help me weed through this seeming jungle of software-packages. I ...
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1answer
60 views

Simulation of tuned circuit with initial inductor current gives flat zero

I'm playing with ngspice, and wondered if I could get a signal out of a simple RLC circuit using an inductor with initial current. There are no power or current sources. The results aren't what I ...
0
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1answer
85 views

SPICE and conditional execution [closed]

Is there a SPICE simulator that allows the user to write some control algorithms within it in the same way as SIMULINK S-function blocks do? I wonder if there was a block in which I can put my ...
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1answer
124 views

PSPICE errors when capacitors are 0Farads

I'm getting a value may not be zero error wheneever I try to simulate a circuit containing capacitors whose values are zero.
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59 views

Spice Simulation model for LTC201, 202, 202

I'm looking for a spice simulation model for the analog switches from LT LTC201-203. Have anyone an idea where I can find them, on the LT site I couldn't find them?
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1answer
224 views

Simulating a magnetic field in Spice

I am trying to simulate a circuit that involves pickup coils in Spice. How would one simulate the magnetic fields that the pickup coils can sense? Additionally, how would one get a frequency response ...
3
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1answer
877 views

LTSpice, MAC97A8 TRIAC model, Vgs error

I'm having some difficulty getting LTSpice to like a TRIAC model. The specific error it throws is "Missing model definition for VGT-0.65". The trouble is that VGT is a subcircuit parameter, not a ...
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61 views

simple syntax problem with Pspice, probing a voltage at a node

I am trying to simulate a simple circuit, here is the code ...
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1answer
115 views

LTSpice simulation trouble

I'm simulating a passband amplifier (some 80 - 200 MHz) stage with two transistors. I'm using LTSpice. When I simulate the transfer function I get a maximum gain at a given frequency, let's say 100 ...
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1answer
164 views

What are limitations of visually simulating/prototyping microcontrollers?

I am thinking of writing a windows applications (similar to Proteus ISIS) to simulate/emulate a specific PIC24 Micro-controller of my system and peripheral components used like Segment LCD and a ...
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3answers
165 views

What's the difference between using SPICE and just putting things on breadboard and testing?

Can SPICE programs do most of the imaginable simulations with any kind of components in the market? Is it important to run SPICE before you do any kind of breadboard work/prototyping?
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470 views

Transient analysis error(missing value) with OrCAD PSPICE 9.1

I am new to PSPICE, and just tried an example given in the book I'm using (SPICE by Sedra/Roberts). ...
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3answers
524 views

.tr0 file format

I am trying to find out some information regarding ".tr0" file format which is produced in the output of HSPICE simulation. I find some relative information about the .tr0 file but nothing about its ...
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1answer
98 views

Changing the plot title in ngspice

I'm hitting a snag plotting some data with ngspice. I'm not sure of the syntax to use to add a title. According to the user manual: ...
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1answer
375 views

How do you create a spice model of a lm234? This model would need to be used with both LTspice and Labcentre's Proteus software

How do you create a spice model of a LM234? This model would need to be used with both LTspice and Labcentre's Proteus software. Please note that I have never created a spice model.
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26 views

NanoSim sampling rate is not constant

I have a SPICE netlist which prints out the voltage of a node. I simulate this SPICE netlist using HSPICE. The .lis file generated by HSPICE gives me the values of this node with a constant sampling ...
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41 views

IRSIM “switch level simulator examples”

I am trying to find out IRSIM , a switch level simulator, some more examples, else than those given in tutorials but i am unable to find so.As per my study, IRSIM is a switch level simulator which ...
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1answer
132 views

Spice definition of resistor/capacitor

I am trying to understand a Spice definition of a circuit and transient analysis on it. I have kind of "inherited" this and can't ask the original creator; my Spice memories from university are pretty ...
3
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1answer
1k views

Measure the leakage current of a CMOS inverter

I would like to measure the leakage current of a CMOS inverter. As this current depends on the input, I decided to measure something average, namely, the leakage current of a ring with two CMOS ...