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From: "Edward Rawde" <invalid@invalid.invalid>
Newsgroups: sci.electronics.design
Subject: Very simple 1kHz sinewave circuit is more than 133dB down on harmonics
Date: Fri, 31 Jan 2025 21:29:40 -0500
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Elaborate DC stabilization isn't needed to get below 130dB.
There's nothing at all visible at 2kHz in this circuit and 3kHz is below 133dB down.
Fine adjustment of the contribution made by the four rectifier phases will minimize the distortion.
Adding more rectifier phases may not buy much more and what would be the best way to get a suitable 45 degree shift?

Four 9V batteries in series would make a good low noise power supply for it.

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