LTSpice is a version of SPICE from Linear Technology
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SPICE Model For Voltage Reference
Anyone aware where can I find SPICE models for MAX6126, MAX6250 etc? I searched a lot and could not find. If anyone knows, can you please share the link/file?
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Why is the output from this astable 555 the reverse of it's simulation?
The simulator in LTSpice looked OK ... so I moved to the breadboard with an LED (eventually replaced the LED with a buzzer) at pin 3. One more difference in the assembled circuit is the condenser at ...
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Choosing a ground for ltspice circuit
I am just getting into this software. I construct my circuit, and it tells me to choose a ground. I only have experience with "ideal" circuits and circuit elements, and have only seen "ground" in the ...
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LTSpice Solar / photovoltaic simulation
I've been trying to simulate a solar cell with LTSpice to generate an I-V curve. The model I've been using is the simplified equivalent circuit model with a current source in parallel with a diode. ...
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how to vary the threshold voltage of a MOSFET for simulation in LTSPICE
I have a MOSFET circuit with multi-threshold voltages. I am using TSMC MOSFET with 180nm technology. How to specify these voltages in LTSPICE for simulation. Please help.
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Does LTSpice support a “Remainder” or “Modulus” function?
I am trying to change a parameter in LT Spice with if statements and make it change on whether a different value is even or odd.
Mathematically, this would be easy with a remainder or modulous ...
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LTSpice simulation of rectifier slows down after short time
I have the following simple circuit set up in LTspice:
Blue is on the output of the transformer and green from the rectifier.
If I don't include a capacitor this works fine and the simulation goes ...
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How do you simulate voltage noise with LTSpice?
Is there a way to setup a voltage supply with voltage jitter/noise? I want to experiment with filtering out noise on various voltages etc. but not sure how to configure LTSpice to create a noisy ...
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Can I simulate any component with LTSpice?
I'm trying to build a very basic 3.3V supply, but would like to simulate the circuit in LTSPice if possible, before I physically build the circuit. I'm using a couple of components not found in ...
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How can one label a node with more than one name in SPICE/ LTspice
Update: node name "alias" (aka synonym) resolution seems to work fine in simple circuits... even though one of the two names "goes away" it's doing what I'd expect by namely referring everything to ...
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315 views
Simulating real world transformer with LTSpice
I'm studying LTSpice, and I'm playing in transformer simulation. I want to modelize a real world power line transformer in a reasonable way: I mean I don't need an exact simulation of some specific ...
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Unijunction transistor in LTspice?
I would like to simulate a simple oscillating circuit involving an unijunction transistor. I do not find such component in LTspice so I figure I need to import one. Could please show me step by step ...
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IIR frequency transformations
(this might be a tad long)
I am trying to make frequency transformations for an IIR in LTspice, from low-pass to band-pass, following these steps: continuous time low-pass H(s) > H(z) > frequency ...
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284 views
Voltage regulators in SPICE software
I am having trouble figuring out how to add voltage regulators to my circuit for SPICE simulation. The regulator is a 78L10AC voltage regulator, 10V, 5% output tolerance, LP package. I have most of my ...
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303 views
Spice model, can't figure it out
I am using LTSpice with the following NMOS model from the library included in the famous book 'Sedra & Smith, Microelectronic circuits' :
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Why is my simple boost converter giving me such a high peak output voltage?
I am trying to understand switch-mode power supply fundamentals through a simulation in LTSpice.
I wanted to build an excruciatingly simple boost converter circuit following a teaching model often ...
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Symmetrical components [SOLVED]
I am trying to build an abc to positive/negative/zero components transformation block (in LTspice), I did it, but sometimes I get erroneous behaviour: DC levels seem to be "omitted" at the output for ...
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480 views
Interpretation of input impedance graph of a filter
I tried to simulate the input impudance of a multipass feedback low pass filter. I want to know if the graph I got is right, and if so, what does it show? Also, what is that dashed line about?
And ...
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DC power supply simulation trouble
I'm trying to simulate a relatively simple AC->DC power supply in LTSpice, but it's not quite cooperating with me. I've followed this schematic:
only replacing potentiometers with resistors due to ...
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Simulating Multiple Feedback Low Pass filter using LTSPICE
I am trying to simulate the follwoing circuit in LTSpice IV. What I am looking for is overall performance in frequency domain.
I downloaded and readed a lot of LTSpice guides, but none of them were ...
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LTSpice Automation
I have a battery-powered boost converter and I'm attempting to measure the maximum input (battery) voltage droop under various load conditions of high current draws (different ...
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Why does LTSpice say that my “Matrix is singular” for this ideal-transformer circuit?
I'm trying to do find the voltage over R1 in the following circuit, where L1/L2 is an ideal transformer. LTSpice complains that the "Matrix is singular". Why? I've tried to play around with lots of ...
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LTspice: when I turn a schematic into a subcircuit it behaves differently. Why?
I'm trying to model a low frequency LED flasher based on a BEAM Pummer (basically a pair of CMOS inverters wired as an oscillator, plus a charge pump) in LTspice. I have the base flasher circuit ...
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How does the Arduino Deumilanove Auto-Reset Function work?
I'd like to hear some explanations as to how the Arduino Duemilanove resets the ATMega328P over USB through the FTDI FT232R transceiver.
I know it involves the IDE playing some games with the DTR ...
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How to correctly simulate a simple LM2907 circuit in LTSpice?
I'm trying to convert the frequency of a 0-5V square wave, which ranges from 0-20kHz, to a voltage using a simple LM2907 (8 pin) circuit.
Using R1 as 100k, I've calculated C1 to be 416pF for a ...
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LTspice: Vary a resistor's value over time
I want to simulate the load regulation of a power-supply. I'm sure I remember being able to vary the value of a resistor over the course of a simulation in LTspice, but I can't remember how. Anyone?
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