About tools to simulate circuits. Specify the tool used.

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24 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 ...
0
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2answers
18 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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2answers
39 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
44 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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2answers
26 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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0answers
11 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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2answers
44 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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0answers
40 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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0answers
45 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
37 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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2answers
38 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
0
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3answers
114 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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2answers
91 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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2answers
130 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. ...
1
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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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0answers
20 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 ...
0
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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 ...
1
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1answer
36 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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0answers
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
39 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
158 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 ...
0
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1answer
58 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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27 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 ...
2
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0answers
43 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 ...
0
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1answer
43 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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0answers
29 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 ...
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2answers
93 views

What the FPGA dev board to choose: Xilinx or Altera? [closed]

I'm very new to programmable logic world and have never worked with any HDL languages, but I certainly want to get started with FPGA. At the moment the goal is to develop/simulate simple 8bit CPU and ...
2
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1answer
29 views

What is the syntax for modelling a non-linear element in Spice?

Suppose I have the following circuit. My question is how do I write the net-list in LTSpice such that f(i) = i^2 + 2 (for example) ? I couldn't find the syntax on the internet.
0
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1answer
44 views

Representing an equation with a simulation of Operation amplifier adder

I am trying to represent an equation (Vf=-3V1+7V2+2) using operation amplifiers. The schematic that I did is: simulate this circuit – Schematic created using CircuitLab but I have ...
2
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2answers
33 views

How to infer equivalent PID controller coefficients from an existing black box ccontroller?

I have a 2 input, 2 output system that I have recorded in response to 1. steps (actually quasi-steps, with 50 ms rise time + some overshoot), and 2. sine waves from 0.5 to 50 Hz, in both open and ...
0
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1answer
53 views

Audio Amplifier Design (CE Amplifier - Class AB Power Amplifier)

I am trying to design a Audio Amplifier which provides a gain of 20db (10V/V). I have managed to design the following circuit but the output voltage gets clipped and clamped. Please find the schematic ...
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2answers
40 views

CE Amplifier Design for Audio Amplifier

I am trying to design an audio amplifier which provides a maximum gain of 20dB (or) 10V/V . For the circuit I designed the lower half of the amplified signal is being clipped. I am also attaching the ...
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1answer
56 views

Why Can't I get a Smooth Sine Curve in PSPICE

I am trying to simulate a Volume Control Circuit in PSPice Student Edition. I am unable to see a smooth sine curve at the output. Could you check my circuit. Find the Schematic below Thanks
0
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1answer
52 views

Why this concept in VHDL doesn't work?

I want to make a simple processing element for calculating the absolute difference between two 8-bit words. However, this element may be used as part of an array in order to speed up the AD ...
-2
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1answer
36 views

Showing negative numbers in Verilog

I am writing a program for a 16-bit ripple carry adder and stumbling a little at the end. When I run my code (which includes negative numbers), it's doing the math right, but giving me all positive ...
0
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1answer
62 views

How to simulate a n-p-n bjt using Cadence Virtuoso?

I had been simulating CMOS transistors using Virtuoso, in which I had used ami06n as model and NCSUanalogParts as library. But for a BJT, when i tried simulating through ADE-L using this config, it ...
0
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1answer
55 views

Simulating a Constant Temperature Anemometer

I am trying to simulate the results I see when using a constant temperature anemometer circuit to sense air flow. An excellent discussion can be found: arduino thermal anemometer. Here is my ...
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1answer
15 views

Disambiguation of AC Analysis and Small Signal Analysis

I am trying to understand Small Signal Analysis (SSA) for Diodes and BJT transistors through different textbooks but I have some issues. Is AC Analysis the same as SSA? I have seen hints that imply ...
0
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1answer
30 views

How is MOSFET modelled in DC analysis?

I am wondering how simulator (LTspice, Cadence,...) compute DC operating point of MOSFET in DC analysis. I know that in DC analysis, capacitors are open and inductors are short. With MOSFET how is it ...
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35 views

Error in 'Multisim' when connecting two op amps in cascade

I've connected the circuit below (wien bridge oscillator) and simulated it using Multisim: The results were expected: a sinusoidal wave of 1.2 Vp-p. I wanted to amplify this resulting signal, so I ...
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0answers
31 views

Half Wave Voltage Doubler Simulation stuck

I'm trying to simulate the following circuit on LTSpice simulate this circuit – Schematic created using CircuitLab The capacitors have 10Meg Parallel ...
0
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3answers
84 views

Input/output impedance of microcontroller

how to calculate the input and out put impedance for a micro controller , for the purpose of modeling in LT spice , for example RX610 family from Renesas For example the lumped characteristics can ...
0
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1answer
362 views

AD620 in Proteus: timestep too small

I've made this circuit in Proteus, as a part of a practice report: In real life it works, as I built and tested it. But in Proteus, when I want to run the simulation, I get these errors: ...
0
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1answer
57 views

simulating a electrical transformer

My goal is to program a FDM simulation of a transformer. So, we have the coupled inductor model to start with ... However, if L1 = 1, L2 = 9, and coupling is perfect then M = sqrt(1*9) = 3 and L1 - ...
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0answers
23 views

Event Debug Mode error when performing mixed Verilog/VHDL simulation in VCS

I am getting the following error: ...
2
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0answers
105 views

Two different ways of writing the same thing but generating different behaviours in Verilog

I have a part of Verilog code that is basically trying to synthesize a flip-flop. I have been experimenting and it seems that I can come up with two ways of writing it. The first way being : ...
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1answer
27 views

Adafruit Anemometer

Recently I bought an anemometer from Adafruit. I was wondering is there is any way or approach which I can simulate the sensor for measuring the wind speed. If there is any software able to simulate ...