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From: "Edward Rawde" <invalid@invalid.invalid>
Newsgroups: sci.electronics.design
Subject: Sample/hold variation of Bill Sloman's variation of the 1kHz sinewave oscillator
Date: Thu, 24 Apr 2025 20:52:25 -0400
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Here's a variation on the variation by Bill Sloman with sample/hold instead of multi phase rectifier.

Performance does not seem to be any better so unless someone can tell me how to design a better practical sample/hold circuit this 
is probably my final post on the subject of sinewave oscillators.
(Which will probably be a relief to some people.)

Operation should be fairly self explanatory. It uses a ringing transformer to open the sample gate for about 10us.

This version uses a comparator for more stable timing characteristics.

D2 etc keeps the comparator output below 40V.

Simulation is very slow for the first few cycles but then speeds up to about 7 ms/s in LTSpice 24.1.7

At least two lines will need to be unwrapped below.

Version 4.1
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