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0answers
33 views

Powerworld Alternative? [on hold]

I want to do some analysis with network models. My network data comes in .raw files, has multiple circuits, and is large; I want to be able to compute TLRs/LODFs/PTDFs, preferably algorithmically ...
1
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1answer
79 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 ...
0
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1answer
39 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 ...
1
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0answers
32 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 ...
1
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1answer
54 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 ...
8
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1answer
404 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 ...
0
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0answers
18 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 ...
1
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0answers
51 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
36 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
198 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 ...
1
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1answer
76 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. ...
0
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3answers
84 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 ...
0
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1answer
64 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 ...
3
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2answers
201 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 ...
0
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2answers
74 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
31 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 = ...
0
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1answer
40 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?
0
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2answers
42 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
99 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
45 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
59 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
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2answers
81 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: ...
0
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0answers
28 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
23 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
71 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 ...
0
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1answer
36 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: ...
0
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0answers
37 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 ...
0
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2answers
72 views

Quartus Gives Undefined Signal For the State of a Finite State Machine. Supposed to Be Showing Enum of the State_type

Before beginning a larger project in Quartus II I'm trying to do the section 8.8 "FSM as an Arbiture Circuit" example from the book "Fundamentals of Digital Logic with VHDL Design 3rd ed" and I can't ...
0
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0answers
91 views

Project to Print School ID on a 7 Segment Display - All Segment Outputs are High When Simulated

I am working on a project that uses a BCD up-counter block, a BCD to school ID block, and a BCD to 7-segment display, in order to print out my school ID on the 7-segment display of an FPGA. Here is ...
0
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2answers
99 views

BCD Up-Counter Schematic Error

When I try to simulate my schematic for my up counter, i get the error Net "Net-name" cannot be connected both to an input port and an instance output pin. Here is my schematic I am pretty sure ...
0
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1answer
40 views

Cadence SoC encounter

I am trying to create the layout of my design for an 8 bit multiplier accumulator in SoC Cadence encounter tool. After routing the design using wroute command, the ...
1
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0answers
72 views

How to create Spice / LTSpice repeatable damped sinusoid

Is there a more elegant and/or simpler method to model a repeating, damped sinusoid from SPICE or LTSpice rather than chaining the damped SINE sources in series? Below is a schematic and the ...
1
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2answers
276 views

Can you interface a Modelsim testbench with an external stimuli

I am working on a team that is doing both driver software and FPGA development. The FPGA simulation is being done in Modelsim and driver software is written in C. To minimize integration risk, I ...
0
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2answers
91 views

How to simulate Wi-fi signal strength indoor environment?

I want to simulate Wi-fi signal strengths received by a mobile moving around in X m3 that contains N access points. I must take into account the effect of walls and if possible the effect of moving ...
1
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1answer
58 views

Does NI Multisim simulates op-amp input and output noise?

I just created a circuit with AD620 in-amp and I'm worried that there is not enough noise. I wonder if Multisim simulates advanced op-amp/in-amp properties, like input noise and such? I mean, if I ...
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0answers
213 views

Wien bridge oscillator LTSPICE

im looking for a good oscillator to implement in a circuit and I was trying to simulate a Wien Bridge oscillator in LTSPICE but I have no success as my output is always 0 V. Is there a special ...
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1answer
69 views

Is there any online or free to download (for Windows 7) AVR simulators? [closed]

I'm currently using CodeVision AVR to write a code. Let's say I have a compiled HEX file and I'd like to try it running on a virtual processor (ATtiny861A). Google gives me some results but I'd ...
0
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0answers
49 views

Modelling Hot-Plug event

In a related question I described unexpected (smulation) behaviour of a P-Ch. MOSFET high-side load switch when input voltage rises very steeply. Now, admittedly a step input can't quite be a good ...
0
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0answers
74 views

How can I create a new component using Qucs?

I'm using Qucs for a simulation, but I don't understand how can I create a new component (E.g. a new LED from a data sheet). How can create it and use it easily in my project?
0
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3answers
91 views

Voltage dip on MOSFET switchable current shunt

I have the following circuit built up in LTSpice which will be used to switch in different sense resistors for current measurements. The mAEn signal switches the M1 transistor on at t=10ms which ...
0
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2answers
129 views

How do I compare waveforms from multiple simulations in QuestaSim/ModelSim

I want to compare the waveform result from different tets. So basically the test stimulus changes but the unit under test is the same in all cases. What steps do I need to follow to do this? ...
1
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0answers
31 views

Parametric sweep batch mode in Gnucap

When doing simulations in Gnucap, batch mode, how can I do a parametric sweep? The sweep command works in interactive mode, but when done in batch mode with ...
0
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1answer
141 views

Pseudo-Nmos inverter in LTSPICE

In LTSPICE, I've built a pseudo-NMOS inverter and I've got 2 tasks to do using it. 1) I've a initial guess for Wn value of NMOS. I start the simulation with this value however, I need to optimize it ...
1
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3answers
76 views

How to optimise something when multiple parameters change the output

This dilemma seems to occurs all the time in so many different engineering problems. It seems impossible to optimise something with multiple parameters, for three reasons: There are too many ...
0
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1answer
85 views

How to fit MAX941 macromodel to LTSpice “opamp2”?

I am new to adding models to LTSpice. I have successfully added OPA350 from TI, but with MAX941 from Maxim Integrated I get some errors due to the LTSpice "opamp2" model does not have the same amount ...
1
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1answer
106 views

How can I model a variable current sink in spice?

For a project I am working on (related question here) I need to model a nonideal variable current sink in spice. Simply reversing the orientation of a current source or inverting its value is not ...
0
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2answers
103 views

ATtiny85 simulation in AtmelStudio 6.1 (build 2730, SP2)

I have written a piece of code which manipulates the DDR for port B: ...
0
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1answer
94 views

sequential circuit chaser light

I am trying to implement a sequential circuit in logisim that has LED chaser lights (http://www.youtube.com/watch?v=Mo8Qls0HnWo) like on this car. I have tried using D flip flops with a clock and ...
2
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1answer
192 views

Relation between delta cycle and event scheduling in verilog simulation?

I understand that in Verilog/SystemVerilog standards there are different regions for event scheduling, thus mimicking the behavior of concurrent hardware. But how does this relate to the delta cycles ...
1
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2answers
163 views

Three-phase rectifier circuit simulation

Is this the correct way to simulate a three-phase full bridge (6 pulses) rectifier? I ask because I have tried this first without the two capacitors, just one, and the capacitor seems to have ...