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Questions tagged [pspice]

For questions about the PSpice variant of the SPICE ("Simulation Program with Integrated Circuit Emphasis") analog circuit simulator. Always use in conjunction with the "spice" tag.

For questions about the PSpice variant of the SPICE ("Simulation Program with Integrated Circuit Emphasis") analog circuit simulator. Always use in conjunction with .

See Wikipedia's articles on PSpice and SPICE for more information.

375 questions
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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
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Why do I get this weird curve for impedance vs Frequency

I am currently working on a simulation for an RLC circuit in Pspice, I am trying to plot the impedance vs frequency curve. After a good while of trying out stuff, I always get such weird curve. Not sure if the function is wrong on its very own In…
wasabi
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LT Spice Voltage Output

I am using LT Spice for simulation of my circuit. I have used a probe to check for the voltage on the Capacitor. What is the green dotted line that can be seen in the plot? Thank you.
hcsitas
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How to change the temperature of sub-circuits in LTSPICE

I have subcircuits of a solar cell (resistors and diodes) in LTSPICE. I want to connect the solar cells (sub-circuits) together. However, each solar cell has a different temperature. I can set the temperature of the program with .Temp but how can I…
Hamed
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How do I import a spice model into QUCS

I am trying to import one of the spice models (from here) into QUCS. I haven't been able to find much documentation about this except for vague hints that it is possible.
user2557313
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How to import PSPICE Model into Orcad Capture?

Can someone tell me how to add PSPICE Model in Orcad Capture and PSPICE simulator. ] have downloaded LM239 PSPICE model from texas instrument site, the file they are providing is "LM239.5_1". While running the simulation I had an error…
Atmega32
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What is the PSPICE model of my probe + oscilloscope?

The oscilloscope and probe manufacturer gives me the following input impedance data: Oscilloscope Input impedance/capacitance: 1 MΩ ± 2%, 16 pF ±3 pF Probe characteristics Bandwidth DC to 75 MHz Switchable 1:1 or 10:1 attenuation ratio Input…
Jorge Johanny Sáenz Noval
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Fourier series of output voltage

I've been practicing some Fourier series questions and then verifying my answers by generating an equivalent graph on MATLAB and comparing it with the graph generated by PSpice in simulating the same circuit. This is my working: The Fourier series…
Lachlan
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3 answers

Using Spice/PSpice (Vishay optocoupler) models in LTSpice

I am trying to use the Vishay-provided spice models of the 6N137 high-speed optocoupler in LTSpice. (Source: http://www.vishay.com/optocouplers/list/product-84732/) Both the "PSpice" model and the "Spice" model fail however. With the "PSpice"…
ARF
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Is there any reference to design a 4*4 bit ram only using transistors

I'm currently doing a project and would like some help. I need to create a 4-bit 4-word RAM using PSPICE. (I'm both new to the PSPICE program and new to the topic of RAM) I currently have successfully created a 6t memory cell with the following…
Alan Gabriel Reyes
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1 answer

Simulating step function in PSpice

How do I implement the the function in Pspice? \$V_s(t)=1.5u(t)-3u(t-.01)+1.5u(t-.02)\$ I know to use the VPULSE source but it has only two voltages as parameters but I need 3.
user1047968
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3 answers

A couple of questions about a 555 in astable mode and a blinking LED

I would like to ask you guys to comment a bit. Does it work in real life? I would like to use a 555 in astable mode with the same time intervals for on and off (both 1s) and let a Vishay diode flash. I know it is not 100% possible to have the same…
Daniel
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Help converting PSPICE model to LTSPICE

The spice model for the MCP601 op-amp by Microchip results in the following error when used in LTSPICE: Analysis: Time step too small; time=1.6021e-005, timestep==1.25e-019: trouble with node "u1:30" I believe this to be a comparability issue,…
Chris-Al
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Help Converting a PSPICE MOSFET .LIB to an LTSPICE .SUB

I am designing a buck-boost regulator for a course at school and I would like to use the OnSemi ntk3139p PMOS transistor. OnSemi provides a few spice models for this part and I am getting stuck converting the Pspice file so that it is usable in…
Jesse
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How to convert encrypted PSpice model into LTspice model?

I want to simulate the model in this link: https://www.diodes.com/part/view/AL8860Q/#tab-details under the header of the Technical documents and Spice Model on the right-hand side. The problem is that it is encrypted for PSpice simulation. I was…
Urban
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