A famous textual circuit simulator with a number of graphic front-ends

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How to reduce voltage of an SRAM cell in HSPICE?

I have a simple 6T SRAM cell and I would like to reduce its voltage VDD for a short period of time. I expect the cell node Q and QB to flip after pulling the voltage supply to zero or at least to ...
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12 views

Installing SPICE on Mac OSX [on hold]

I am looking to install spice3f5 or similar on my Mac OSX but I cannot find clear steps on how to do it. I am not looking for MacSpice 3 or ngSpice but just SPICE itself. Any help would be greatly ...
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26 views

HSPICE code to cut off supply voltage of a subcircuit

I am trying to cut off the supply voltage "Vcontrol" of a subblock "circuit" for a very short time using a pmos, a nmos transitor and a voltage source. The Hspice code is as follows: ...
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17 views

Referencing DC Operating Points When Plotting Expressions in LTspice

I'm new to SPICE, and I have a question about SPICE commands and references. I've been using LTspice to design a multistage amplifier, and I am interested in plotting out the outputs of each stage, ...
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19 views

HSPICE subcircuit design problem

I want to design below circuit in HSPICE , Technique used is GDI . The Code is given below. ...
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22 views

Passing user parameters into a custom PSpice model

I am building my own simulation parts in Orcad 16.6: I can build a schematic and take the generated netlist to use as a stand-alone component, but I want to be able to change parameters inside the ...
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1answer
29 views

LTSpice Measurement on Plot

I am modeling different circuits in LTSpice and I cannot for the life of me find ways to annotate the plots with measurements. How can I perform simple measurements such as measuring 3dB points, max ...
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1answer
88 views

Regulator circuit design

I need to design a regulator for my thesis, but I really need help, Please! The topic: - A temperature regulator for a small fridge Some details: - the regulator has to control a peltier element ...
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31 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.
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50 views

SPICE how to assign a variable voltage generator for receiving antenna

I would like to do an AC analysis, noise analysis and signal to noise simulations using TINA TI - LT spice is OK How do I assign a variable voltage with parameters to an AC voltage source in SPICE? ...
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1answer
107 views

power supply oscillates when loaded with instrumentation amp

I've been working on an instrumentation amplifier for a PWL ECG signal in LTSPICE. It should be able to filter out the common mode noise. I Also need to design a power supply. Both the power supply ...
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49 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 ...
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208 views

AC/DC wall adaptor as LTSpice Analog behavior model (ABM)

Suppose a circuit shuld be supplied ( in real life ) from a wall mount AC/DC adaptor. The adaptor has a nominal voltage of 12VDC 500mA. With no load the adapter puts out 21.6V. After some measurement ...
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114 views

How do I import a spice model into QUCS

I am trying to import one of the spice models (from here) into QUCS. I haven't been able to find much documentation about this except for vague hints that it is possible.
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40 views

Power feeder current and LTSpice simulation

I'm trying to develop a power feeder as already state in question Power feeder scheme adaptation. I have done some adjustments, now my circuit is The voltage regulator is an LM317. Since I have to ...
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1answer
96 views

LTspice MOSFET width sweep

I am trying to simulate the transfer characteristics of a CMOS inverter using LTspice. I want to sweep the MOSFET width and length and observe the effects on rise and fall times of the CMOS inverter. ...
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106 views

Where to get PSPICE models of ceramic resonators?

I wish to design and simulate IF filters using ceramic resonators and crystal oscillators in OrCAD Capture or LT SPICE. The default libraries don't have any ceramics, so anyone know where to download ...
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57 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 ...
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37 views

Spice model for a latching relay

I need a latching relay model, ideally for DPDT, (http://www.digikey.com/product-detail/en/TX2-L2-12V/255-1782-5-ND/570918) and can't seem to find anything like that. I am hoping some awesome SEer ...
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66 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: ...
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47 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 ...
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1answer
82 views

Complementary MOSFET symbol in Multisim(Electronics Workbench)

It is just me or symbol for complementary mosfet pair in NI Multisim is wrong? And actually not just the symbol, but the function itself - it doesn't work as it is supposed to(or it's just me being ...
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233 views

Depletion Mode MOSFET Modelling in SPICE

Does anyone know how to model a depletion mode N channel MOSFET in spice? I have looked online however the majority of resources have shown how to model a depletion type or enhancement type. I ...
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29 views

avgpower in spice for subthreshold leakage

Assume one NMOS transistor is defined in a spice code. There are two sources ...
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159 views

'Missing subcircuit' when creating a Pspice library part from the OPA188 Spice file provided by TI

I created a Pspice part using the Spice file provided by TI. When simulating, I get the following error: ERROR(ORPSIM-15108): Subcircuit RNOISE_FREE_0 used by X_U1.XR101 is undefined ...
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97 views

SPICE model of DRAM

Is there a SPICE model for DRAM developed? I am interested in any type of model at any level starting from DRAM memory cell and towards to whole memory VLSI circuit. I am seeking for a DRAM operation ...
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51 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?
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974 views

how to resolve floating node error in pspice

I would like to run an AC sweep for a very simple circuit (Please see the image). Unfortunately the following errors occurred: L_L2 N04540 0 .10976mH R_R3 N04968 N02907 ...
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81 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 ...
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20 views

X1 WIRE symbol in Intusoft IsSpice4

I am using Intusoft's Spice simulator and according to the manual on page 77 the WIRE is in the Interconnects/Generic category of the Parts browser. However, there isn't such category in the parts ...
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35 views

Spice transient measurement fails!

I'm practicing HSPICE and encountered a trivial problem! Why this code ...
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145 views

LTSpice missing an SSR Component?

I want to simulate some circuits with SSR component but LTSpice does not provide this. From Eagle and KiCad I learned I can create my own component diagram. I'm not sure if I can do this also with a ...
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2answers
297 views

IR2110 LTspice simulation weird behaviour

I am obtaining weird voltage behaviour at the gate of my high side mosfet controlled by IR2110 which is controlled by PWM. PWM configuration: Vinitial = 0 Von = 5v Tdelay = 0 Trise = 7u Tfall = 7u ...
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120 views

PSpice gives a crazy plot

I am simulating the following circuit The input voltage is a PWL voltage source that I configured to get a unit impulse input. From Matlab I know I am supposed to get this response But this is ...
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85 views

NAND equal rising and falling time in Spice

I have written a spice code to implement a NAND gate. Then I measured the switch time of that. (The time between change in input which effects the output). I want the rising and falling time to be ...
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37 views

Units of area parameter in ngspice

Can anyone tell me what are the units of area parameter used in ngspice?
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1answer
503 views

Help With Simulating Common Collector Amplifier In PSPICE

I have included as much information as possible, so it should just be a matter of pointing out something simple (hopefully). I am trying to model a biasing circuit for a Common Collector BJT ...
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1answer
118 views

Diode peak reverse recovery current

I'm trying to calculate the peak reverse recovery current \$I_{RM(REC)}\$ of a diode from information given on a typical diode datasheet (really what I want is the transit time TT, but the only piece ...
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1answer
105 views

Add permanent component in LTSpice from asc and asy

I'm trying to add a new permanent component (ULN2803) to LTSpice, having asc and asy files. I have read some tutorials in the web but focused on .lib and .sub files. How can I add the component from ...
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339 views

HSPICE - Measuring a series of values in transient simulation

I'm doing a transient simulation in HSPICE with an input vector file of N values (N>100). I would like to get at each rising edge of the clock (i.e. timing of the shape kT, T period, k integer) a ...
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55 views

transient analysis in aim spice

How do I carry out the transient analysis of series RLC circuit using AIM Spice? I can't figure out what values should be given for step size and final time. Also, I was seeing some tutorials and ...
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144 views

Error: Model in Pspice is undefined

When I simulate the circuit below in Pspice, the output info says: model J2n5485 used by Q2N5485 is undefined. But I have defined the model in the code. I need to ...
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36 views

How is Waveform Compression used in LTSpice to determine Timestep?

The LTspice wiki says (and I believe this is basically copy pasted from the offical documentation): Syntax: ...
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2answers
107 views

Simulating a linear voltage regulator with ngspice

I am trying to simulate a simple linear regulator using gschem and ngspice. However, my output voltage varies by over a volt as my input voltage goes from 10V to 20V. Can I reduce this swing in the ...
3
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1answer
149 views

LTspice: Noise simulation AND AC analysis in one plot

Is it possible to run a noise simulation and an AC simulation independently from one another and display the results in the same plot? Or better, is there a way to determine the SNR in one single ...
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31 views

Use a parameter in the measure statement in spice

What I want to do I have a circuit simulation where at the top, I have .csparam VDD=1.8 I want to have a measure statement that measures rise time (the amount ...
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92 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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416 views

A band pass filter simulation in PSpice

I designed a Constant K (I don't remember the constant K) LC band Pass filter with lower cut off frequency 1 KHz and upper 5 KHz. Using the value of K, I deduced the values of L and C and made the ...
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1answer
111 views

Free spice Model to simulate integrated circuits design

I am using ltspice and I would like to simulate integrated full custom circuits for educational purpose. I found the NMOS4 and PMOS4 models but there are not enough since there are too ideal there ...
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51 views

Using Models from PSPICE in ISPICE

How can I use a model from PSPICE into ISpice? I've been told that Spice models are roughly cross engine compatible. Intusoft ISpice has a really easy UI, but doesn't have as many models included as ...