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

learn more… | top users | synonyms

0
votes
1answer
19 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 ...
1
vote
0answers
56 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 ...
1
vote
3answers
134 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 ...
1
vote
1answer
42 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 ...
1
vote
2answers
27 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 ...
1
vote
0answers
25 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 ...
1
vote
1answer
49 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 - ...
0
votes
1answer
49 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 ...
0
votes
0answers
79 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. ...
1
vote
1answer
61 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? ...
0
votes
1answer
36 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 ...
1
vote
1answer
62 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?
0
votes
2answers
71 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. ...
1
vote
1answer
63 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 ...
3
votes
3answers
94 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: ...
1
vote
1answer
33 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 ...
3
votes
2answers
85 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 ...
0
votes
1answer
52 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
votes
1answer
67 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 ...
1
vote
1answer
87 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.
0
votes
0answers
39 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?
4
votes
0answers
99 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
votes
1answer
465 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 ...
0
votes
0answers
43 views

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

I am trying to simulate a simple circuit, here is the code ...
0
votes
1answer
103 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 ...
0
votes
1answer
135 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 ...
2
votes
3answers
149 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?
1
vote
1answer
296 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). ...
3
votes
3answers
303 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 ...
1
vote
1answer
68 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: ...
1
vote
1answer
255 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.
0
votes
0answers
19 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 ...
0
votes
0answers
34 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 ...
0
votes
1answer
115 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
votes
1answer
673 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 ...
0
votes
0answers
85 views

Spice Convergence error (Won't simulate)

I'm a trying to simulate the following circuit and I cannot work out why it won't converge. It used to work, but when I added R10 in it stopped working. The error can be seen in the screenshot. ...
0
votes
0answers
143 views

Transformer modelling in ngspice vs. LTspice?

Has anyone had any luck modelling a transformer as two coupled inductors in ngspice? I have a boost converter modelled in LTspice, with this transformer: ...
1
vote
1answer
135 views

Ferrite Bead Simulation in SPICE

I am reading this link about ferrite beads and in page 2, figure 2, there is a SPICE circuit to emulate the ferrite beads frequency response. Why there is an AC Current Source in the circuit? Why ...
0
votes
1answer
61 views

Finding the Voltage source function when the function of voltage across inductor is given in SPICE

My circuit contains a voltage source in series with an inductor and a resistor. I am given the voltage function across the inductor. How to I get the voltage function across the source from this using ...
2
votes
3answers
253 views

Interfacing with USB connector in simulation

I'm prototyping a board which has a USB connector, in Spice or any other circuit simulation technology. The production board will plug into the PC and there will be some software which talks to it ...
0
votes
0answers
45 views

Spice .EXTRACT statement with wildcard character?

I'm trying to extract the VDSAT and Vth of all the transistors in my circuit to see how much margin I have for the individual transistors to remain in saturation. I've used the extract statement ...
4
votes
1answer
571 views

Model a set-reset relay in SPICE

I am designing a circuit with a magnetic latching set-reset relay, and I would like to test the design in ngspice (open-source spice). I have downloaded the documentation but I see nothing about ...
2
votes
2answers
148 views

ngspice not printing currents for any circuit

I'm reading an EE book that references SPICE so to follow along on my linux machine I installed ngspice. I can't output current for any circuits! I've tried passing the file with -r option and ...
0
votes
0answers
105 views

gschem/SPICE value attribute for LED and BC546

Hello everybody out there using gEDA/gschem, What attributes do I have to use for a (red) 5mm LED (looks pretty much like a standard one to me) and the BC546 transistor in gschem in order to export a ...
0
votes
1answer
121 views

Customized MOSFET in SPICE

Is it possible in SPICE to create a MOSFET with user defined values of V_T(Threshold Voltage)? This question cropped up because I was taking a course on Analog Design with videos & problem ...
1
vote
1answer
159 views

Measured VS Ltspice Difference in P-Chan JFET Attenuator

The following circuit is a slow switching +-15V audio signal attenuator: Why are the measured voltages (shown in white boxes) so different from the SPICE values (shown in the graph)? Note that ...
1
vote
0answers
72 views

Spice code for uplim and dnlim?

Does anyone know where I can get sources for LTspice's uplim and dnlim? I'm trying to port a netlist from LTspice to ngspice. ...
0
votes
1answer
146 views

How do I display results using ngspice?

Using this tutorial, I am using ngspice (on Cygwin) to run the following file: My first circuit v 1 0 dc 10 r 1 0 5 .end However, after running it using ...
2
votes
0answers
96 views

PSpice VSIN frequency - how to set it in rad/s?

I know, that if I want to set FREQ, I need to set it in Hz, not in rad/s. I know, that 1 Hz = 2*pi rad/s, but how to do this in PSpice? What should I enter exactly? and btw. if I want to set VOFF ...
0
votes
0answers
109 views

Create a circuit out of netlist file

I'm working with gschem, gnetlist & ngspice (gEDA). I've downloaded a SUBCKT file from here. The file name is 'irf9317.spi' and some of it's content is: ...