[sdiy] [synth-diy] lock-in amplifiers

Donald Tillman don at till.com
Sun Jan 26 18:07:19 CET 2014

On Jan 26, 2014, at 7:50 AM, cheater00 . <cheater00 at gmail.com> wrote:

> I've recently stumbled upon the concept of a lock-in amplifier.
> Basically, it is a way to recover an AM signal from a carrier, even if
> the carrier is buried deep in noise.

Your description is difficult to follow, but I'm pretty sure this is exactly the same technique that's used to detect the L-R multiplex signal in Stereo FM.

  -- Don

Don Tillman
Palo Alto, California
don at till.com

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