Questions tagged [ltspice]
Anything related to LTspice. LTspice is a SPICE simulation, schematic capture, and waveform viewer program from Linear Technology. LTspice is freeware with a very liberal license, it is lightweight, and isn't crippled in any way.
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LT6268-10 Opamp Oscillation and Offset
Below is my Photodiode-OpAmp circuit that is configured as Transimpedance Amplifier.
When I put both inverting and non inverting into ground, no signal is coming out. However when I connect ...
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Modelling power transfer under saturation for 1:N current transformer in LTspice
A toroidal current transformer consisting of two half-toroids with air gaps, is clamped around an overhead 50 Hz AC power line carrying 50-300 A (i.e. a 1:N CT). It is used for energy harvesting.
Is ...
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Help to configure an LTspice PLL simulation
I never tried PLLs before and to gain some insight I'm trying to simulate CD4046Bg in LTspice where I want the output to phase-lock and follow the input signal. I tried so far the below:
But I get an ...
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Import transistor into LTSpice
I would like to import this transistor -> RFD16N06LE (datasheet: https://www.alldatasheet.com/datasheet-pdf/pdf/67811/INTERSIL/RFD16N06LE.html) into LTSpice; the datasheet has a PSPICE model ...
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Decent MOSFET for a beginner to learn from?
I am relearning MOSFETs, but more importantly I would like to focus on building some basic circuits and learning practicality over theory. I have a BSEE but haven't spent much time outside of class on ...
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Where should I take the measurement from to find the correct attenuation level of a resistive pi attenuator?
I am currently designing a resistive attenuator for an RF project I'm working on. I wanted to have several resistance combinations to obtain various attenuation levels (1-8 dBs). When I calculate the ...
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Can this oscillator possibly work?
I am trying to build a crude RF oscillator. My first attempt, though it simulated fine, disappointingly did not oscillate when soldered together. So, to debug this, I reduced the simulation example ...
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How can I simulate an RF signal as received by an antenna in LTspice?
How can I simulate an RF signal as received by an antenna in LTspice?
I am designing a simple HF RF receiver and want to test it via LTspice. Can I simulate an RF signal as:
A pure voltage source, ...
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How soft start circuit works, LTspice simulation [closed]
Please help for the attached circuit, further explain how soft start circuit works in M2 (PMOS) with RC circuit, computation and the voltage divider with zener diode with BJT (PNP), how it works, for ...
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Why did I get different simulation results for the same transistor model in LTspice?
The following is my FM transmitter circuit. In the first simulation, I auto-generated a symbol for BFQ19S.
Replace the auto-generated symbol with the one from default NPN.
In the second simulation, ...
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Is there any way to speed up simulation in Ltspice? [closed]
The following is my FM transmitter circuit. It takes about 1 minute to simulate.
In real life, I want to use this BFQ19SH6327XTSA1 from Infineon instead of 2N22222. (link datasheet) and download link ...
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Beat frequency - Square signal
This question comes from this one, LTspice - Beat frequency:
It appears that when I did a FFT of two sinusoidal signals, there was no what is called beat frequency.
When I do the same exercice with ...
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Does the FFT in LTspice not work properly?
I wanted to do an FFT of a square signal in LTspice. Here is the simulation:
Here is the result of the FFT through R4:
There is no reason to have frequencies below 100 kHz according to theory. What ...
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LTspice - Beat frequency
Here is the theory from wikipedia:
Here are my summation of sin on LTspice:
The frequencies are 100 kHz and 120 kHz on the FFT. There is no frequencies at (f1+f2)/2 and no frequencies at (f1-f2)/2.
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Need help analyzing sability of op-amp in a current source in LTSpice
I have to perform stability analysis on an op-amp (AD8671) which is being used as an op-amp in the circuit attached. I am using LTSpice to perform this. My approach is to give a 1V AC small signal at ...
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