About tools to simulate circuits. Specify the tool used.

learn more… | top users | synonyms

1
vote
3answers
77 views

Frequency response of a complex circuit

I am interested in finding the impedance as a function of frequency of the \$n^{th}\$ circuit in this series: simulate this circuit – Schematic created using CircuitLab (By request: this ...
0
votes
0answers
17 views

naming/wording of an introduced sub circuit ->interpose model

I have a question in context of of a naming convention. Imagine a schematic of electrical components (a netlist), where I want to change the behavior of one part by cutting the wiring and adding a ...
0
votes
1answer
28 views

Attiny10 not triggering timer overflow interrupt while simulation (Atmel Studio 6)

I have problems simulating the timer overflow in Atmel Studio 6. The code is for an Attiny10 and looks like below. As far as I know I set all the neccessary bits to enable the counter (which works in ...
-1
votes
0answers
47 views

Necessary tools/environment for writing VHDL RTL? [closed]

I decided to implement my own MIPS computer using Digital Design and Computer Architecture book. I decided to use VHDL since Peter Ashenden's "The VHDL Cookbook" I think is a great starting point. If ...
0
votes
2answers
36 views

Is it possible to simulate hardware of MIPS architecture computer defined using Verilog/VHDL?

I am reading Digital Design and Computer Architecture book and if I will be persistent then I will have MIPS architecture computer at the end, implemented from scratch by me . I wonder is it ...
0
votes
1answer
19 views

How to achieve a block of Z^(-0.5) in Simulink?

I'm doing simulation in Simulink of Matlab, but don't know how to get a Z^(-0.5) cell like this:
0
votes
0answers
29 views

How to get change in position and rotation from gyroscope and accelerometer?

i have a 6-axis accelerometer and gyroscope MPU6050 . i'm using simulink with arduino to read to raw data from the mpu . I intend to measure something that only moves in the X and Z axis. I've heard ...
0
votes
0answers
12 views

Extract dynamic power Xilinx XPower

As i see in text books, Power trace of a design can be extracted using Xilinx Design Suit which show dynamic power vs. time. However trying to use Xilinx XPower and Power Estimator, it only shows ...
1
vote
2answers
41 views

How Verilog decides upon simultaneous events

Say we have a function, simple as f(x) = x. Say we have a clock that ticks every 20 nanoseconds, and say we change x as we wish. ...
-2
votes
1answer
23 views

Post Map simulation reliability

I'm designing a module in VHDL for an FPGA. My module is added to already existing design. It has a Wishbone slave interface. The IDE (Lattice Semiconductor Diamond 3.2 ) allows to do post map ...
0
votes
1answer
15 views

ADG608 multiplexer acting really strange in Multisim

I am trying to use the circuit below to switch between multiple resistors using a multiplexer. Initially I had different values of resistors attached to every channel, but since I was getting very ...
0
votes
0answers
29 views

how to solve mosfet size match error in tanner 14.1 for 0.18um process

I have refer your answer for spice simulation. but it is not going with 14.1 version. please help me with respect to 14.1 version.
0
votes
0answers
49 views

simple inverter simulation in simulink

I am facing a weird problem simulating a rather simple inverter circuit in simulink. The schematic I'm working on is shown below. The oscillograms refer to PWM (a,b,c,d) and output which is 0! ...
0
votes
0answers
34 views

Incremental Conductance MPPT algorithm in MATLAB Simulink

I am simulating an application of the incremental conductance MPPT algorithm with a boost converter in MATLAB Simulink. The PV cell and boost converter have been modeled. I am facing problems while ...
1
vote
1answer
51 views

Edge detector issue

I've a stupid problem and I don' figure out how I can solve it. In my design I'm using a rising edge detector. The problem is that ActiveHDL doesn't simulate it in the way that I expect. The VHDL code ...
1
vote
1answer
23 views

3D device simulation of diode (static)

I am looking for a simple 3d software solving the drift and diffusion model for a diode in equilibrium. (Very simple abrupt p/n-junction - even without contacts. Purpose: teaching). I know Silvaco ...
0
votes
1answer
47 views

Vivaldi Antenna: size & max input power & software simulation

First, I've to say I'm a beginner in this field so please forgive me if my questions were not smart. I was reading about Vivaldi antenna and I decided to do an experiment; I'm going to use a flat ...
1
vote
0answers
38 views

Convergence problem in pspice but not in ltspice

I am trying to simulate a circuit in LTSPICE and it simulates without any convergence problems. However when I copy the netlist into pspice and try it simulate it I get strange results. It keeps ...
-2
votes
1answer
47 views

Clipping circuit simulation producing unexpected result

I am playing around with a clipping circuit to protect a adc on my microcontroller. I beleive the following will work, but when I simulated the circuit I saw something funky. Any ideas on why adding ...
0
votes
0answers
11 views

how to make parameters as input port in Matlab?

I want to calculate BER in a communication system in Matlab simulink. I have used from "error rate calculation block", which accepts the transmitted and received signals as inputs and the output is ...
0
votes
1answer
30 views

Microstrip lenght problem

I'm simulating a single microstrip half-wave resonator (1.8 GHz) in Sonnet and using ADS LineCalc tool for calculating the microstrip length but I'm getting a wrong number. Substrate parameters ...
1
vote
2answers
79 views

Using iSim to simulate 16-bit CLA schematic on Xilinx, all inputs and outputs on the waveform are 'X'. How can I debug?

I'm building a sixteen bit Carry Lookahead Adder for my EE class. I'm definitely a noob to all this so bear with me, however I've been googling for a WHILE and haven't found any answers. Here is the ...
0
votes
0answers
12 views

For a given design, are same vectors used for functional (RTL) as well as gate level (with delays values) simulation?

The difference between RTL and gate level simulation is that the the gate level synthesis uses a fitted netlist together with the delay values for paths and cells. However, the interface is the same ...
0
votes
0answers
36 views

How can I experimentally determine the breakdown voltage of air using FEMM simulations

I have setup a rod-plane gap scenario in FEMM as shown here: and here:. I understand that the breakdown voltage of air is 3kV/mm and therefore have set my conductor to be at 4kV for the simulation. ...
0
votes
2answers
80 views

Cadence pSpice weird simulation results

I made two simulations of real opamp and ideal opamp, why are results so different if other params are the same? Model I took from maxim site ...
0
votes
0answers
47 views

HSPICE multithreading problem

I am running a transient analysis on a large-sized analog circuit. To speed up the simulation and to conduct experiments I would like to invoke multithreading or the HSPICE Precision Parallel ...
-1
votes
1answer
89 views

Free online circuit simulator [closed]

Is there some free online circuit simulator where I can see see the electrons fluxing,imitating real-life circuitry?
0
votes
0answers
13 views

Wave Edit option is not working in Questasim

I was working on a project which has a DUT and testbench. After simulation I tried to invert a signal in the design by clicking the wave edit button. But all the option in the wave edit was ...
0
votes
0answers
26 views

Unshielded Twisted Wire Pair Simulation

I created a model of a UTP wire based upon discrete RLCG transmission line model. The model is almost 98% accurate when compared to static measurements i.e. Char. Impedance, Inductance, capacitance. ...
0
votes
1answer
84 views

Since the z-transform of the zero order hold is 1, why bother including it in analysis or simulation?

The z-transform of the zero order hold is 1. So why should it even be considered in the discrete time analysis or simulation of discrete time control systems? ...
0
votes
1answer
58 views

How to run new .meas commands without having to rerun the whole ltspice simulation?

I am trying to analyze a circuits properties over a certain range of component values, e.g. a PWM circuit for various settings of the control pot. For this I create a bunch of ...
0
votes
0answers
10 views

Application of SIMPLIS POP analysis to converters with AC input

Is there any restrictions on switching frequency of the converter? SIMPLIS help says: Converters with AC inputs will only POP under very specific circumstances. These requirements are: ...
1
vote
2answers
84 views

What software can I use to simulate I.B.I.S Models?

I am trying to simulate a switch (TS5A3154) which is made my Texas Instruments but the only models they have available are ones called IBIS Models. Now I have done a little bit of research and ...
0
votes
1answer
53 views

DC Motor inertia voltage drop

following a tutorial on the web I created in LTSpice a DC motor model, but I have a question about the results, the model is: and this is the spice netlist: ...
0
votes
0answers
41 views

How to plot curves in ngspice with proper x and y-axis parameters

We are currently being introduced in our class to ngspice and I have this homework that asks us to graph the Ic versus Vce curves of a common emitter amplifier for different values of Vbe. The circuit ...
2
votes
1answer
69 views

Signals not showing in Vivado simulation

I have the below Verilog code and simulation where I want to view the signals and compare the clocks for each of them. ...
0
votes
0answers
26 views

CST 3-D FDTD simulation

I am working on FDTD simulation of any space. I can work with Matlab and C code for 1D and 2D case but for 3D case it becomes complicated so I want to use CST microwave studio. I want to run simple ...
0
votes
1answer
76 views

Behaviour of DC series motors

I'm having trouble implementing a DC series motor simulation, and I think this is due to the fact that I do not understand the motor behaviour itself. Notice that the mechanical part of the ...
1
vote
1answer
97 views

Kvaser Leaf Light CAN BUS Simulator problems

I'm learning to use this tool Kvaser Leaf Light V2 with CAN-BUS. I'm stuck with some problems. I can read the packets around the CAN-BUS line from the car, I can save it in a text file, but when I ...
3
votes
4answers
319 views

What is the purpose of pre-synthesis simulation?

I have used Verilog to develop RTL representations of synthesizable digital circuits, and have recently been using Verilator to run simulations of these. My understanding of Verilog semantics, ...
0
votes
1answer
44 views

recalculate delay from fsdb file

I came across hsim help menu and I found these two switches pretty interesting. ...
2
votes
1answer
81 views

What's the error in this simulated amplifier circuit?

I have attempted to simulate (using Circuit Simulator) an IC amplifier circuit (the LM386-3) based on the schematic reference manual. Here is the schematic: and here is my simulated version: On ...
9
votes
2answers
212 views

Straight from the datasheet: Is this really a sensible filter circuit?

Cirrus Logic CS42426-CQZ is an audio CODEC that I want to use in a custom USB sound card. You can download the datasheet from there. On page 61, the datasheet has a recommended circuit for each A/D ...
0
votes
0answers
36 views

How to connect a large exisiting code (some simulator) to the AVR Studio Simulator?

Context I am working on a brushless DC motor controller project. And I would like to verify that the interrupt timings make sense in simulation before downloading my code to the board. Challenge ...
0
votes
1answer
57 views

Digital Output Control over ECU discrete inputs

I am looking for a better solution or method for controlling the discrete inputs to an ECU using a simulator and signal conditioning. The discrete input signals from the ECU provide an output of 15V ...
0
votes
0answers
44 views

Edge triggered master slave flip flop with transition gates spice

How can i create the netlist in ng-spice for this circuit? I don't know how to connect the transition gates.Any help?
0
votes
0answers
49 views

Question about an LC oscillator

I saw a previous question about an LC oscillator and I wanted to know how it works. What I figured out is, that the current across R2 is approximately always constant (Q1 base current doesn't drop too ...
1
vote
1answer
77 views

Designing and simulating a common source amplifier circuit

This is the problem: And this is my design for R1 and R2: So, using B2 Spice simulator I made this circuit according to the design: Vin_ and Vout_ are voltmeters. But the problem is that ...
1
vote
1answer
86 views

Why feedback is activating at more than 4V?

In this circuit: I don't get why the current start flowing from more than 4V. I thought was due to threshold, but the same happens with an NPN as M2 or using an BS170. With this last one, ...
0
votes
0answers
50 views

Analog relay in logisim

I am attempting to create a 4PDT relay in logisim to play with mechanical logic circuits. I am not sure if it is possible to simulate the analog connection of the relay, where signal can flow in ...