About tools to simulate circuits. Specify the tool used.

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3answers
35 views

Stepped Sine Wave in Spice

I'm interested in simulating a circuit using a stepped sine wave input. I want to sample a sine wave at regular intervals and have the output constant during each interval, making an output that looks ...
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4answers
64 views

How to measure DC Operating Point of a simple transistor circuit

Could someone explain to me how to find the DC Operating point of this circuit? I need to find it by running a simulation and probing the circuit, not solving for it mathematically, and I'm not sure ...
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1answer
38 views

Three-Phase Thyristor Converter Simulation Question

I am required to simulate a three-phase full wave thyristor converter using MATLAB Simulink. The circuit I have so far is given below: The three input sources are 230V each at 50Hz, the first ...
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0answers
32 views

Simulating TI Products in smartspice (without TINA-TI)

UPDATED PROBLEM I am interested in simulating a TI Operational Amplifier OPA188AID and am having some issues with correctly creating a symbol in smartspice using the model provided on TI's website. I ...
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0answers
40 views

Defibrillator simulation in Matlab/Simulink

Guys'm doing work at the university, to deliver on Friday the 17th and my problem is as follows. My aim is about defibrillator and I have to do the simulation and generate a pulse same as ...
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1answer
51 views

Is there any offline circuit simulator software that can simulate a noisy power supply?

I have been using Circuit Wizard (Its the only offline program that I can find!). Unfortunately, it is really basic, and I have outgrown it. I need to simulate a 5V circuit with a noisy power ...
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0answers
59 views

1 Mbps satellite channel with a 270 ms delay

Consider 500 byte frames sends on a satellite channel with a 270 ms delay on send an receive by 1 Mbps rate. by ignore the length of ACK message and using Slide Window technique, how many bits need ...
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0answers
18 views

How Poisson solver diverged?

I am trying to simulate my MOSFET and PN junction structure. The Poisson solver diverges (the number goes to infinity) when simulating either a high doping structure (1e20 1/cm^3 or higher) or a high ...
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1answer
47 views

VHDL internal signal assignment

I am new to VHDL and tried to implement a simple example from a book, what represents a 2bit register and the testbench. Compiling the files works well, and signals the stimulate the register (reset, ...
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0answers
51 views

Scilab palettes for Three Phase System [closed]

Where can I find these palettes in xcos? Three-Phase V-I measurement Three-phase fault distributed parameter line
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1answer
35 views

Circuit simulation problem dealing with transistor operation

Simulating the circuit below (PMOS charge pump; doubles the input supply), all the transistors are operating in cutoff region when I extracted the .dp0 file. What might this means? I'm using SYNOPSYS ...
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1answer
56 views

Simulating a circuit consisting of MOSFETs

When simulating a circuit consisting of mosfets, when can you say that the MOS should be in cut-off, saturation. or linear (triode) region? Specifically a charge pump circuit utilizing PMOS.(refer to ...
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2answers
132 views

Op-amp differentiator and integrator circuit: resistor and capacitor values

I don't understand how to determine value of resistors and capacitor in differentiator and integrator circuit of Op-Amp. I tried to align the amplitudes of these sine waves. I keep changing their ...
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1answer
49 views

PSpice Op-Amp sawtooh wave

I've got this homework about PSPice and op-amp. I need to make this triangular waveform and sawtooth(?) waveform of non-inverting op-amp circuit. I know the triangle one is 500us like the picture. ...
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1answer
68 views

D flip flop simulation: which simulation output is right?

I have always wondered, what is the right solution to the D flip flop when the input changes right at the rising edge of the clock? I have found two solutions of these online but have no clue which is ...
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1answer
52 views

Trying to understand what is needed for simple circuit simulation [closed]

I'm working on my Capstone project and a major component of it involves designing a circuit that works with the IOIO-OTG, some motors and a battery. I'm trying to find a free circuit software that ...
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0answers
20 views

Disable display in Synopsys VCS

I am currently simulating this large piece of verilog that is full of $display commands for debugging. I believe this is making simulation slower so I want to get rid of most of those. Is there a way ...
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0answers
59 views

How to create JK flip flop in proteus 8

I want to create a JK flip flop in Proteus 8.0 ISIS simulation tool. This is what I tried, but the problem with this is that the outputs Q and Q' are always zero regardless of what I set J or K. ...
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1answer
80 views

What is wrong with this PSpice simulation?

I am trying to simulate this circuit on PSpice as my first PSpice homework, I'm required to learn to simulate circuits on this software. From calculations, we know that: Ix = 16 A. Current ...
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0answers
31 views

How to get OpenCL kernel simulation performance by Altera OpenCL SDK or Quartus II?

I am using OpenCL to program FPGA by Altera OpenCL SDK. However, I don't have an Altera FPGA board now. Thus currently I just want to do emulation or simulation to get performance like number of ...
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0answers
34 views

Is it possible to create a custom animated component on Proteus ISIS?

I'm using a subcircuit block, where the inside circuit is like this: When i simulate the circuit in the main sheet, i have to use the "go to child sheet" command to see if the LED D5 is illuminated ...
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0answers
69 views

Find IC's Model file (*.MDF) for Proteus

I have a circuit design and I want to simulate and test it on Proteus before implementing it. But some of ICs which I've used give me errors when start simulation. The error was ...
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0answers
42 views

Real world efficiency of a LM3150 Webench DC power supply design?

When designing a DC/DC step down converter with TI Webench with these parameters: Vin min: 11.4 V Vin max: 12.6 V Output : 5.0 V Iout : 8.0 A Ambient temp: 30 ºC Then turn the efficiency knob ...
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1answer
50 views

LTSpice Level 2 Simulation CMOS follower

I'm trying to make a level 2 simulation of a voltage buffer made by a CMOS circuit: For this, I have been told to use level 2 CNM25 technology Spice models for the transistors, and I have been ...
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1answer
102 views

8 Transistor Full Adder

I am working on 8 Transistor full adder which is based on 3 Transistor XOR cell. I have studied many IEEE Papers for 8 Transistor Full adder. All have same ckt as above.But the full adder is not ...
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1answer
47 views

Problems with OpAmp based amplifier simulation

I'm trying to simulate a simple amplifier for an electret microphone, but having problems regarding the output level and virtual ground. The circuit in Multisim is as follows: What I'm having ...
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0answers
46 views

Snubberless TRIAC not turning on in negative cycle

I have a simple circuit with a MOC and Snubberless TRIAC. I am using the ST Snubberless Library for my simulation. I cannot understand why the TRIAC does not turn on in the negative half cycle, even ...
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1answer
89 views

How to design a SPICE model from data sheet?

I am new to SPICE simulation and I am looking for spice model file of LTC 1065 data sheet can be found here here. I searched a lot on Google but I could not find ...
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1answer
416 views

Why doesn't my opamp relaxation oscillator oscillate?

I have designed a relaxation oscillator with an opamp. It is supposed to oscillated at 50Hz, but it doesn't. I haven't built a physical circuit, I'm trying to simulate it in CircuitLab. I calculated ...
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0answers
19 views

How do I specify a parameter for a specific component in LTSpice?

I have a schematic which uses two center-tapped transformers. I found that I can specify the ratio between the two sides of the transformer by adding the directive ".param ratioT=0.3". Now that I ...
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0answers
91 views

Piezo & RFC Modeling! [closed]

I want to model the circuit in the picture below. It is an ultrasonic humidifier. But I can't model it for two reasons: The inductor on emitter is a RFC (radio frequency choke). There's a crystal ...
0
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1answer
63 views

Problem simulating FSM in Quartus II Simulator

I am trying to simulate a FSM using vector simulator... the state machine variable is called "Tstep_Q", I added it to waveform editor... however, when I start the functional simulation all signals are ...
2
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4answers
212 views

Simulating Smoothing Caps in TINA

I'm trying to simulate the workings of smoothing capacitors in TINA-TI. I have a varying voltage source (sine wave varying from 4.5-5.5V) and 2 capacitors (1uF and 100uF) connected. The load is a 1000 ...
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1answer
121 views

How to simulate PCIe to debug my FPGA endpoint

I'm working on an FPGA controller connected through PCIe. The only way I can debug the hardware is using chipscope. So I execute commands through my driver and check out the signals from the FPGA. ...
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3answers
89 views

Alien circuit component

I am modeling chip ‍MC14538 in PSPICE by building its internal circuit from the datasheet. I, however, can't figure out what ...
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1answer
94 views

Help understanding the behavior of an RLC circuit

I am trying to generate a transient pulse (time to peak T1 = 6us; time to fall to 50% of peak T2 = 70us) with an RLC circuit. The cap is first charged and then discharged through an LR circuit. I ...
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2answers
220 views

How can I simulate a bridged output of a speaker at 8 ohms?

Following on from my previous post on a single 5V rail amplifier, I'm trying to simulate a bridged output op amp set up to drive an 8 0hm load. One of the solutions was: Use a bridge output. This ...
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2answers
76 views

Why am I not able to simulate a circuit as it is given in a problem?

I'm currently in the process of working through some circuit analysis books on my own. Though it's easy enough to compare my answers to those given in the appendices, I figured that it would be ...
0
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1answer
39 views

Changing the duration of a pulse in PSPICE

I am trying to simulate lightning in PSpice using an exponential voltage source (VEXP). The duration of the lightning pulse is required to be in the 110-120 microseconds range with peak voltage = ...
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1answer
50 views

What does “no design unit detected in this file” mean?

I got this error then I tried to add a source file. Can anyone tell me what this means? What should I do to correct it?
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2answers
46 views

Debugging simulation error in Xlinx for VHDL

I used Xilinx to simulated Logic And Gate, and it worked fine. I followed same procedure to simulate Half-Subtractor, but got stuck in between. When I checked Xilinx window for two codes I found ...
0
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1answer
195 views

How to make a simulation for wireless power transfer circuit in HFSS (High Frequency Structural Simulator) software?

I want to simulate a circuit of wireless power transfer consisting of two resonating coils along with a loop with each coil. I am stuck with introducing a coil in HFSS.
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2answers
47 views

Is there any simulation software that can be used for simulation circuits of wireless power transfer?

I am searching for a simulation software that also shows the interaction between electromagnetic waves in a wireless power transfer setup.
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1answer
72 views

Current sink - work in simulator, doesn't work in real

I've built current sink to drive wheatstone bridge. I've counted that I must reach current ~0.2mA to properly working whole measure system. Picture below present my current sink (I use MCP6001 op ...
2
votes
2answers
92 views

ngspice, malloc: internal error can't allocate -8 bytes

I am new to ngspice and trying to simulate my first circuit. I have posted my spice.net and my simulation.cmd below with a picture of my schematic. When I run the simulation I get the error message: ...
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0answers
31 views

what is the difference between continous phase FSK and discontinous phase FSK? How do their outputs look?

I simulated the output of both the cases in simulink but not able to differentiate. The above shows the output for the continuous fsk, please see the figure for values of mask parameters. The above ...
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0answers
31 views

simulate QPSK using simulink

I have tring to simulate QPSK system using simulink , so i choose from workspace block , to enter the data into the system , but when i have simulate it , an error ...
0
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1answer
100 views

How to correctly edit a system to increase per-unit voltage of a bus [PowerWorld Simulator]

I have created and simulated the following energy system using PowerWorld Simulator 17 (please download the picture if it's not clear). Now, I was given the requirement that every bus should have ...
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1answer
43 views

Inverter not showing the right output in HSPICE

This is the code snippet apart from the usual headers in the rest of the file: ...
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0answers
57 views

How to connect a simpowersystems components with simelectronics?

I am doing a project in synchronous generator and I am using comparator from the simelelectronics and using simpowersystem components to connect each other. There is a problem in connecting the ...