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Why is this simple RC oscillating?

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EEEnthusiast:
Don't use online tools for any serious simulations. Better stick to the well known AMS simulators. P-Spice for TI, LTSpice, Mplab Mindi (Simplis + Simmetrix). Most of these come free with small limitations, except for LTSpice. For faster convergence, try to use non-ideal components like a cap with finite ESR and leakage, Inductor with finite DCR and SRF and so on. 

Neper:
Maybe it's the virtual equivalent of the old adage that homebrew oscillators, on first power-up, never oscillate but homebrew amplifiers always do.  ;)

T3sl4co1l:

--- Quote from: Neper on December 18, 2021, 12:52:18 pm ---Maybe it' the virtual equivalent of the old adage that homebrew oscillators, on first power-up, never oscillate but homebrew amplifiers always do.  ;)

--- End quote ---

You don't usually have to screw up an amplifier very much to make an oscillator, though.  How badly do you have to screw up a passive filter to make an oscillator or amplifier? :-DD :-DD

(Obligatory Simpsons reference)



Tim

SiliconWizard:
Well you can certainly make a purely passive LC circuit oscillate. At least for a while. But pure RC or RL circuits? I'd like to see that.

amyk:
This simulator has some very weird parasitics... :-DD

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