LTSpice - Basics and DC Operating Point Analysis - Phil's Lab #48

How to use LTSpice (free circuit simulator), including basics of the software, as well as DC operating point analysis for a simple circuit (op-amp unity-gain voltage follower, configured as a half-rail bias generator). Lesson is an extract of the 'Mixed-Signal Hardware Design with KiCad' course. ⏵Available here: phils-lab-shop.fedevel.education
[SUPPORT]
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[COURSES]
⏵Mixed-Signal: www.phils-lab.net/courses
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[LINKS]
⏵Full Altium Designer Tutorial: • STM32 PCB Design - Com...
⏵GitHub: github.com/pms67
⏵LTSpice Download: www.analog.com/en/design-cent...
[TIMESTAMPS]
00:00 Introduction
00:18 Course
00:26 Altium Designer Free Trial and Tutorial
00:54 LTSpice Download
01:34 LTSpice Basics
02:00 Adding Op-Amp and Voltage Source
03:27 Adding Net Names
04:04 Drawing Wires
04:17 Placing Resistors and Capacitors
04:48 Misc. Tips and Changing Values
05:17 DC Operating Point Analysis
06:14 Label Your Nets!
ID: QIBvbJtYjWuHiTG0uCoK

[@kenwallace6493]

LTspice is an excellent tool for EE's. I use it for power conversions circuits. One can add Control libs that contain PWM blocks, SPDT switches, and digital components. Basically one can model a full digital control loop and switchmode power train. Great tool! It has a lot of features that are not well documented such as getting average and rms values of waveforms via a few keystrokes.

[@bignosethethird]

LTSpice works on Linux with WINE. Whoopee!

[@PhilsLab]

Ah yes, that was it! Thanks for the comment :)

[@rajimordecai1099]

I am loving your contents more and more. You are what we need.

[@PhilsLab]

Thank you, Raji!

[@RajinderSingh-tn9pu]

This course is a masterpiece.

[@PhilsLab]

Thank you very much!

[@eriklopez996]

Just what I needed.

[@rick_er2481]

Amazing looking forward to more on LTspice

[@PhilsLab]

Thanks, Rick - more to come on LTSpice!

[@sandman94]

coming back to this video, they've clearly improved the shortcuts (version 24). no more function keys.

[@Tim_Small]

This weekend's (Jan 5th 6th 2022) free to attend online version of the annual FOSDEM conference includes talks (with live Q+A) on both ngspice and KiCAD as part of the "Computer Aided Modeling and Design" "devroom". The main KiCAD talk at FOSDEM is usually given by KiCAD project lead Wayne Stambaugh, and will include info on what's planned for KiCAD v7. Check out the schedule!

[@YamenNazer]

Amazing video😍😍😍
I can use Proteus but does anyone think it's a good program to simulate?
I'm still looking for a pro SIMULATION program (not PCB design)
I haven't decided yet which program should i master..

[@lmmlStudios]

Holy shit, just learnt so many things in this that weren't covered in my university introduction to spice. so good

[@PhilsLab]

Thank you, glad to hear that!

[@toannguyenk62hust]

Love from VietNam.

[@nadirabbas4402]

informative

[@power-max]

I started using LTspice a lot to try and build a 2KW LLC converter. I had to make a sub circuit for the L6599 IC (it was what I could get my hands on) but no model for it unfortunately.
One problem I ran into was the ground symbol is global to the schematic and included subcircuit models. The 'GND' pin on my symbol does not actually connect to ground. This limits the ability to have the chip floating on top of a voltage rail for instance since it is referenced to the global ground net.
How do you get around this?

[@gino.avanzini]

What I've done in the past is to add a big resistor linking your real GND to the floating GND. I think the maximum value is something like 1 TΩ (teraohm). You could also add a tiny capacitor in parallel

[@Piccodon]

@@gino.avanzini I have done the same simulating 3-phase circuits. In reality there is always some leakage however minute. Which transformer does not have a leakage capacitance and inductance?

[@sc0or]

I respect your digital domain expertise, and thank you for all your vids, but analog guys will always prefer to add one more transformer and couple of caps than to make a bias voltage )

[@indyzd]

Definitely disagree with this. a simple LDO or SMPS IC would be a much better approach then to slap in a beefy transformer with a diode rectifier bridge and filtering caps, then you'd still have to smooth out with a linear regulator. Might as well just put a linear regulator there in the first place.
Good video Phil! I think it would be worth mentioning that this method of creating a bias is fine for reference voltages for ADC's and what not, but probably not the best way to generate a bias for something. That should be the job of a linear regulator since they are so damn cheap, small, and efficient.

[@ktofa3822]

Hi, please analog ic design with exercises.Thx.

[@PampostReturning]

Thank you.

[@PhilsLab]

Thanks for watching!

[@abdulrouflone_5555]

I love open source, but MATLAB is love

[@iwbnwif]

Is it just me or does the video end too early?