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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How to find the output resistance of a Transconductance Amplifier in LTspice?
Here is a circuit I made in LTspice based on an example in the Sedra/Smith book. I want to measure Rout and Rof (as shown in the Example's figure) if possible. How should I do this?
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Low-Side Current Sense Simulation
I have followed design guides online on how to create a low-side current sense circuit, for use with FOC to control a 3-phase BLDC.
There is a differential input low-pass filter, common-mode filter, ...
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Problem with F/V converter LM2917 (LTSpice)
I a working on an inductive loop for vehicle detection sensor, it works by detecting for frequency changes, which would require an F/V converter, in this case im suing LM2917
I followed the schematic ...
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Powering an opamp with a reference voltage from a zener diode
I'm making a PSU so I need to create a Vdd for the DC-DC switcher I am using that will power the switcher whilst the auxiliary supply is offline.
I decided to use an opamp comparator to drive a P-...
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Review my 5-37Hz filter and amplifer. Will it work? Am I missing any other simulation. (Made in LTspice)
Context. I am using this filter and amplifier to detect Schumann resonances. These are EM modes of very low frequency (7,14,20,28,33) of pT range. My goal is to use a copper coil sensor. These are AC ...
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Voltage Comparator Project
I'm working on an electronics project and I'm trying to build a voltage comparator. The idea is: if V1 = V2, the LED should turn on; otherwise, it should stay off. I also designed a current source ...
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VCO-based ADC for audio bandwidth
I am designing a VCO-based ADC (the circuit is shown below) for sampling the audio signal.
The design I refered to this post: Low frequency in this VCO design. But I instead of use it as a VCO only, I ...
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Buck converter bode plot (Frequency Response) doesnt match measurements
I have a LTC3833 based buck converter that I need to test. Simulations of the open loop transfer show a very low phase margin of 29 deg. I corrected this by adding a capacitor C1 of 47 pF to ITH as ...
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Discrepancy Between LTSpice Simulation and Real Measurements
I have designed a circuit that we use in practice, and it works correctly in real life. we connect J2 to microcontroller to monitor the current in primary side. it is working so good in practice. I ...
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How to model and simulate a PCB Rogowski coil (two-halves type) with equivalent circuit in SPICE?
I’m currently trying to simulate a Rogowski coil implemented on a PCB, before moving to hardware design.
The goal is to understand its electrical behavior — induced voltage, bandwidth, and the effect ...
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How to design a DC-DC buck converter circuit with sliding mode control for simulation in LTspice?
I am trying to understand how a DC-DC buck converter with sliding mode control works and to simulate one in LTspice, but I am really having many difficulties. Basically, I am not able to generate the ...
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LTspice simulation results of current programmed mode control for buck converter not matching one shown in the book
I'm trying to simulate the Current Programmed Mode Control subcircuit for the buck converter described in section 18.5 of the Book Fundamentals of Power Electronics by Dragan Maksimović and Erickson, ...
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Overvoltage protection circuit using TL431, 2N7002, and PMOS not giving expected output in LTspice
I went through an overvoltage protection circuit (schematic image attached) that uses a TL431, 2N7002 NMOS, and a PMOS (IPD380P06NMATMA1). The circuit is designed for a 13 V threshold.
From my ...
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LC tank resonance in LTSPICE
I am simulating a lossless LC tank driven by an AC source in LTSpice. The source frequency is the same as the tank's resonant frequency. I expect to see the inductor current and capacitor voltage grow ...
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How do I simulate the RDS value in LTspice?
I'm having trouble finding any material, for example: a manual or video that shows how to measure the RDS of a MOSFET in LTSpice.I want to understand the behavior in this circuit I've built.
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