Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [spice]

A famous textual circuit simulator with a number of graphic front-ends. Please tag with the precise flavor used (e.g. Pspice, LTspice, ngspice, Multisim, Proteus, Qucs) whenever appropriate (e.g. syntax or debugging) because there are substantive differences between implementations.

SPICE stands for "Simulation Program with Integrated Circuit Emphasis" and is an analog circuit simulator. It was originally written at UC Berkeley and published under a permissive license. There are a lot of (free and paid) forks/flavors of SPICE available today. The Wikipedia article is a good starting point to learn more. This tag should be used to mark general questions related to circuit simulations with SPICE.

related tags:

Further reading:

648 questions
72
votes
7 answers

What are the freeware SPICE simulators available?

Does anyone know of a freeware SPICE / circuit simulator? SPICE (Simulation Program with Integrated Circuit Emphasis) is a general-purpose, open source analog electronic circuit simulator. It is a powerful program that is used in integrated…
Edward
  • 1,339
  • 3
  • 17
  • 24
46
votes
6 answers

How do I model an LED with SPICE?

What diode modifiers are used in practice to model LEDs with SPICE (Berkeley v.3f5)? These are available to me: # Name Parameter Units Default Example Area 1 IS Saturation current A …
tyblu
  • 8,167
  • 6
  • 40
  • 70
36
votes
7 answers

Comparison Between SPICE Simulators

I've recently realized that I can't do everything easily in ngspice, mainly because analysis has to be performed through the interpreter. I'm considering switching to a new SPICE simulator. I'd like a list the advantages and disadvantages of the…
sj755
  • 889
  • 3
  • 11
  • 18
21
votes
4 answers

How do I construct a SPICE model from a data-sheet?

This may not be the ideal forum for the question; please migrate if a forum is better suited for the question. I'm looking at a component for which my attempts at locating a SPICE model online were fruitless. There are, however, datasheets of the…
Everyone
  • 3,011
  • 8
  • 35
  • 49
20
votes
5 answers

SPICE Simulator at Linux

What is the better choice to get opensource SPICE simulator on Linux? I am fan of Proteus (Windows) is there any alternative like it?
user17904
20
votes
1 answer

Mathematical models for vacuum tubes?

Are there any commonly accepted algebraic models for vacuum tube operation (triode, tetrode, and pentode)? In the same way that BJTs have a Gummel-Poon or Ebers-Moll model, and (macroscale) MOSFETs have a cutoff/linear/saturation algebraic model,…
compumike
  • 3,624
  • 23
  • 20
16
votes
6 answers

How to plot current in ngspice?

I wish to plot out the current and power in ngspice. In the case of voltage, for example, if I wanted to plot the voltage at node 1 I would use: plot v(1) Problem is, when I try i(1), the vector isn't recognized. Could someone provide a few…
sj755
  • 889
  • 3
  • 11
  • 18
15
votes
2 answers

LTspice sinusoidal voltage source with offset much larger than amplitude broken?

I've been troubleshooting an analog circuit and have just come to the realization that Sine Voltage sources at mV are broken. Here is one that is supposed to provide a 1mV 1Hz sine wave on top of a 300mV DC signal. Instead I get complete garbage.…
EasyOhm
  • 4,609
  • 26
  • 35
14
votes
2 answers

How to define the initial charge of a capacitor in SPICE

I would like to simulate a circuit with a capaciot in LTSPICE. In the first hand, I have tried to charge the capacitors in a period of time. However, the charging current is very high and I am not sure whether the capacitor will be completely…
Hamed
  • 311
  • 1
  • 2
  • 10
12
votes
3 answers

How can I convert PSpice model into LTSpice Model?

I would need to simulate these two MOSFETs ino LTSPICE but I have the Spice Model IPW65R019C7 Its PSpice model its insiede Nchannel CoolMos…
Fabio
  • 159
  • 1
  • 3
  • 8
11
votes
4 answers

What are the most widely used circuit simulators in industry?

I was wondering if anyone knows what the most widely (not favorite) used circuit simulation tools are in industry. I have a couple options here at the company I work at, but I still like to use LTSpice for most of my work. I'm pretty fresh out of…
Adam
  • 111
  • 1
  • 1
  • 3
9
votes
7 answers

Software suggestions for electronic simulations?

I am a beginner in EE engineering and want to use a software where I can analyze signals or even motor speeds, power electronics ect. But the Spice programs looks so boring and detailed for me. Maybe it is because I'm new. Is there an interactive…
user16307
  • 11,802
  • 51
  • 173
  • 312
9
votes
2 answers

Is there a solution for converting printed schematics to spice netlists?

I would like to be able to scan circuit diagrams into a circuit simulator. While I am aware that symbols are not entirely standardized, is there any software that will do an approximation of this?
Joe Stavitsky
  • 1,149
  • 2
  • 15
  • 26
8
votes
1 answer

How does LTSpice model reverse recovery time?

Hello everyone, I am working on the prediction of the reverse recovery losses in a Buck converter. I have the following schematic: You can see below a zoom on the turning-off time of the diode: I am using the following models for the MOS and the…
dtc
  • 83
  • 1
  • 3
8
votes
1 answer

How do I achieve XY mode on LTspice?

I have two node voltages that I wish to plot against each other, similar to the XY mode on an oscilloscope. How do I achieve this via LTspice? LTspice only plots quantities against time.
user8244
  • 183
  • 1
  • 1
  • 4
1
2 3
…
43 44