About tools to simulate circuits. Specify the tool used.

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18 views

How can I simulate this vhdl using modelsim?

I'm new to model sim. I have this vhdl -- Code your design here ...
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27 views

Finding the resistance to charge/discharge for a LIFeMP battery

I am trying to run an automotive systems simulator (ADVISOR) in Matlab, and I am having some trouble regarding my Energy Storage Unit. I am currently trying to simulate my system with a Valence U24-...
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1answer
17 views

How to simulate adc with avr simulator 2?

I would like to know is there a way to simulate (without involving real hardware) analogue input for the ADC pin with stimuli file in avr simulator 2? I've failed simulating it in Proteus and in my ...
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15 views

current sense circuit simulation using TINA

I have been trying to simulate a current sense circuit with TINA a Texas instruments simulator. I need to make a current sense circuit with an INA 105 opamp and a 0.1 ohm resistor. Please help me ...
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1answer
49 views

Virtuoso Monte Carlo Inductor Problem

For an LNA design, the simulations for the inductors and the simulation for the rest of the components (transistors, capacitors, resistors etc.) are done in two different software packages. The ...
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3answers
115 views

LtSpice computation limitation: Which conditions do affect it?

I am trying to simulate a transistor level circuit in LtSpice. There are more than 200 transistors in the design and a few opamps. Mostly logic structures. The problem is that LtSpice can not solve ...
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16 views

Adding LM2903m to Tina Ti

I was wondering since in default installation of Tina Ti there's no this component, how can I add it?
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1answer
48 views

How to get a CMOS transistor SPICE model?

So far in order to simulate CMOS circuits I relied on a library that I had to randomly download from Internet such as this one: http://ecee.colorado.edu/~ecen4827/spice/ltspice/5827_035.lib Inside ...
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33 views

modelling of solar cell: offset in short-circuit current

I am trying to simulate the IV curve of a solar cell in reverse and forward bias. I have used bishop equation that you can see in the following picture. The mathermatical model is in good ...
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57 views

How to make LTSpice sub-circuits available globally?

LTSpice Hierachy block can not be found if it is not in current working directory. I am using this tutorial to create sub-circuits in LTSpice: http://www.audio-perfection.com/spice-ltspice/...
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32 views

Initialize variable used in always_ff block

I have a bunch of (System) Verilog code that uses initialization statements. This is code for an Altera FPGA. I test the code using automated testbenches in the version of modelsim that ships with ...
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1answer
16 views

How to accomplish parameterized subcircuits in LTSpice?

I am trying to play around with beta ratio effect of CMOS inverter. To do so I need to have parameterized subcircuit so I can adjust the ratio of PMOS beta over NMOS beta and achieve HI-skewed or LO-...
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41 views

Can I simulate Microcontroller based circuits in Altium as I can do it in Proteus?

I want to know is there a way to draw a schematic with Microcontroller in Altium designer and download my code on it and simulate it like what we can do in Proteus? Is this a good way or I should keep ...
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32 views

Autodesk Circuits electronics online design tool, how accurate is it?

I'm fairly new to electronics and I'm trying to learn from books and online, I came across Autodesk Circuits website few weeks ago by chance and it looks really professional, it even has a function ...
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65 views

If there is a branch and the two paths lead back to the same ground, will they both recieve power?

I'm using an online circuit simulator found here. When I have a single path through both LEDs, they each illuminate: However, when I add a wire to create a cycle, one of the LEDs loses power: ...
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12 views

How to copy PSCAD example project and build a new one

I'm new to PSCAD. I find many example projects of interest and want to use them. However, when I simply copy them into my new project, it didn't work. I am wondering how to do it. Thanks very much!
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34 views

Metastability simulation

I am trying to observe the metastability by simulating (LTSpice) a chain of inverters and probe the signals in between. The oscillation never happens (I put more than 5 inverters to ensure enough ...
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15 views

Electric Field and Charges Simulation Software

I am looking for a software or application of some kind that lets take a 2D plane an put electrodes (or an electric field), charged surfaces, and point charges and see how they react under different ...
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1answer
25 views

How should I do an efficiency analysis of an AC motor driver in LtSpice?

I have two different AC motor drivers and I need to test them for energy efficiency in an analysis tool (I know only LtSpice). But I don't know how to model an AC motor. Driver's circuitries are ...
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34 views

LTSpice error message: Multiple instances of “M:XX:XX:XX:1”

This is driving me nuts. I am trying to simulate some fundamental digital gates in transistor level using LTSpice. Each component is defined in a separate sub-circuit. Sometimes when I put a sub-...
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32 views

LTSpice removing PWL point

I do a transient Simulation with many similar subcircuits. Each subcircuit has a current source on the Input. For example the current source 49 is creating following Signal: I49 r49 inp49 PWL ...
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34 views

Frequency response formula from RLC Circuit

I am currently trying to get a frequency response graph from an RLC circuit. This circuit models a speaker in a vented box (helmholtz-resonator): I tried simulating in in circuit lab but the output ...
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23 views

Which CMOS SPICE model should I choose?

I need to simulate digital circuits which have custom gates. For now I am not concerned about the specific CMOS technology, the transistor Length and Width, etc. I only need to glue NMOS and PMOS ...
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35 views

Histogram Graph in ModelSim Simulator

I have a Memory (Register Bank), this bank has 255 registers that each register contains a 16 bit number, type of registers is STD_LOGIC_VECTOR but there is no problem if I should convert them to ...
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2answers
21 views

PSPICE: How to change the axes in simulation?

I am getting V on both the axes? I need a I- V Curve of zener diode characteristics
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44 views

PSPICE: DC Sweep of zener diode characteristics not working

As you can see, these are my schematic and DC sweep diagrams. Why am I not getting a characteristic zener diode plot?
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1answer
55 views

VHDL - Issue with simulation of testbench - Modelsim PE Student 10.4

I'm very new to VHDL and got an issue with the simulation time in Modelsim PE Student Edition 10.4. I wrote some files for a RTL-model such as multiplexer, demultiplexer and register. To test my ...
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34 views

Simulation of OCC, for a 3 phase Alternator using MATLAB/Simulink

I was wondering if there was a way simulate a 3 phase alternator on MATLAB/Simulink and obtain its Open Circuit Characteristics by conducting an Open Circuit test. Also is there any other possible ...
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25 views

How can I make a “power-controlled” current source in Proteus VSM/ISIS?

I'm trying to simulate the electro-thermal behavior of an IGBT in a Boost DC-DC Converter (100 Vin - 400 Vout, 8kW Output Power) using Proteus VSM/ISIS. The electro part was easy as pie. However, I ...
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47 views

Altium simulation time

I am currently working on a quite big project and I use Altium to simulate my overall circuit to make everything works as I expect it to. I have something like 10 sheets linked to each other with ...
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45 views

How to simulate this multiplexer in transistor level?

This is a schematic of a hazard-free multiplexer taken from B. Lin and S. Devadas, “Synthesis of hazard-free multilevel logic under multiple-input changes from binary decision diagrams,” IEEE ...
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50 views

Uniqueness of circuit models

N.B. I am not referring to unique solutions of circuit models, rather unique circuit behaviour. Using a method such as Nodal analysis to find each equation that defines a circuit can find unique ...
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1answer
41 views

CMOS 4000 series postfix meaning: BCL, BCP, BD

I am simulating a digital circuit and I need to use a CMOS inverter 4009. There are three of them with different postfixes: 4009BCL 4009BCP 4009BD What are the differences between BCL and BCP and ...
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44 views

Toroidal Coil on OrCad Pspice

I am trying to simulate the circuit below. I am new to this software. How can I represent the toroidal coil named F and P in OrCad Pspice software? Thanks
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119 views

OP amp PI controlled electrical load

I am building an electrical load, capable of "sinking" 0 - 3A on a maximum of 60VDC. I want to control the load with a microcontrollers ADC (0-3V). On the internet you find hundereds of circuit ...
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98 views

Simulating a TI microcontroller in Spice

I have bought a microcontroller from Texas instruments: MSP430F6779. I would like to simulate in a circuit along with other components: resistors, op amps, sensors.. What program allows me to do that?...
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178 views

register with enable signal, problem of understanding simulation results

I simulated a 32-bit register with an enable input in Vivado. The following things are unclear to me: I don't understand why 0xFFFFFFFF is latched at 5 ns and not the previous value 0x0abcdeff. ...
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1answer
36 views

Voltage follower with LF411 shows -6dB instead of 0dB

I designed the circuit shown in the first picture. It is a voltage follower realised with a LF411, connected to its output is a load of 10k and an AC source on its input with an amplitude 0.5V. I am ...
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21 views

Theoretically simulating photo-voltaic solar panels using math/code

I'd like to simulate the behavior of PV solar panels and model how various parameters affect their performance. For example the effects of irradiance, temperature, and series and shunt resistors. I ...
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1answer
50 views

What is a “reference conductor”?

I am working with a twisted cable model. Therefore I have: 2 input pins 2 output pins But I also have a fifth input/output call "reference conductor". Based on the notation, it seems to be an ...
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1answer
40 views

LTspice giving incorrect voltage value for simple first order low pass RC filter

I drew this low pass filter circuit to have a output voltage of 5v across capacitor at a frequency of 100Hz sine wave of amplitude 10v. But I am only getting 4.5 volt as output in steady state. I am ...
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22 views

Does the absolute sum of the elements of the imaginary part of the Y-matrix correspond to anything?

I have a simulation of a device with 4 ports (a double gated organic field-effect transistor), about which I also have some experimental data. I also made a simulation where I extracted the impedance ...
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1answer
54 views

PSpice Simulation of CE8301

I have been working on a project that requires me to boost 1V to 5V. I have found a ready-to-use boost regulator that gets the job done. The problem is that I need to get the circuit simulated on ...
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2answers
165 views

Understand mosfet conductance simulation?

I made a simple simulation of following circuit (in LTSpice): The IRFZ44N mosfet (10v on gate voltage) is switched on and off with 1kHZ 12V 50% duty cycle PWM signal. The "Heavy-load" is just a ...
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1answer
77 views

How to identify semiconductor parameters for spice model?

I am simulating circuit which uses NPN IRFZ44N power MOSFET and MBR1560CT rectifier (used in the circuit just as a shottky diode, connecting 2 out of its 3 legs only). Here is a circuit made in “...
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29 views

Stamp Errors in layout

I am working on layout. I have two power supplies. For this when I took a via from Metal1 to n well I got no issues. But when i consider another via from Metal1 to n well, I am getting the following ...
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16 views

Estimate realistic parameters of transformer for educational simulation of DC/DC converter

I am trying to simulate a full bridge DC/DC converter with SimPowerSystems for educational purposes using the datasheet of a specific converter as example. For the simulation I need the following ...
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55 views

LTSpice constraints on plots

A have a circuit for which I have parameterized some of its resistors with the .STEP command. Consequently, I have many different graphs when I simulate the circuit. I would like to know if it was ...
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1answer
46 views

ModelSim simulation won't advance

I am trying to simulate a testbench on ModelSim, but when I run the simulation, it never advances in time. The delta does not increase, either. Are there any useful tips for debugging in a situation ...
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30 views

How to model constant voltage across fuel cell in a process model

I am creating a process model of a fuel cell using the finite element method. I'm having trouble modeling the electrical component of my system - and I was wondering if any electrical engineers here ...