LTspice tutorial - Feedback loop simulation in linear and switching systems

#46 #ltspice In this tutorial I take a look at stability issues in power supply circuits - namely feedback loops; How do you simulate the open loop response of a closed loop using LTspice? I explore this topic in both linear and non-linear systems like switching supplies. Its an interesting analysis technique that can provide a lot of value if you know what to look for! Simulation links: https://drive.google.com/open?id=18PBPLCpDVF175OnRZkRieokOOlXGhM3w Relevant technical documents: https://www.analog.com/en/technical-articles/ltspice-extracting-switch-mode-power-supply-loop-gain-in-simulation-and-why-you-usually-don-t-need.html http://www.ti.com/lit/an/snva020b/snva020b.pdf If you liked this video be sure to check out my other videos and you can also subscribe to be up to date with all the new ones! If you want to support the creation of more and better videos you can at: https://www.patreon.com/feszelectronics Tutorial series EP1-Getting started: https://youtu.be/JRcyHuyb1V0 EP2-AC simulation and the Baxandall tone control circuit: https://youtu.be/P_ENvucaZkI EP3-.param and .step directives: https://youtu.be/ARE5nwiHI0Q EP4-How to import libraries and component models: https://youtu.be/8V5XabccFaE Ep5- Stock example simulations to play with: https://youtu.be/MwfeMjcM4zY Ep6- Basics of FFT analysis and .four statment: https://youtu.be/rVAvW1Jh2AE EP7- Dependent voltage and current sources https://youtu.be/Jn8mJG3qeoo Ep8- Turning a datasheet into a component model https://youtu.be/0smuo8bMRn4 EP9- Independent voltage and current sources https://youtu.be/nPZ7vneN3v8 Ep10- .wave statement and audio file processing https://youtu.be/mdJm-TzrBsA Ep11 The effect of temperature on your circuit https://youtu.be/VzxnNrOMcMo EP12 Modeling a DC brushed motor https://youtu.be/Wc4XzTrWSpo Ep13- Worst Case, Monte Carlo and Gaussian statistics circuit analysis https://youtu.be/NdGqboW2VcY EP14 - Digital circuits and logic gates https://youtu.be/JttE2NObDPM EP15- SMPS EMI and electrical noise and filters https://youtu.be/QEAzcaiBrpY EP16- Feedback loop simulation https://youtu.be/X4yaBwaO1gk Ep17 - Verifying Simulation Models https://youtu.be/DSDiIkKQaAE Ep18 - Simulating Capacitors https://youtu.be/QpWPTolhfEo Ep 19 - Simulating Inductors https://youtu.be/65fNDRows90 EP 20 - Noise simulations https://youtu.be/Dh5XmFXlljI Ep21 - Models and Libraries https://youtu.be/GUFMfSlD2AM Music: The Builder by Kevin MacLeod http://incompetech.com Creative Commons — Attribution 3.0 Unported — CC BY 3.0 Free Download / Stream: https://bit.ly/_the-builder Music promoted by Audio Library https://youtu.be/nuEQC2TKWDo