[sdiy] [synth-diy] Frequency shifter which rejects negative frequencies

cheater00 . cheater00 at gmail.com
Sun Jan 26 18:29:04 CET 2014

On Sun, Jan 26, 2014 at 6:21 PM, Donald Tillman <don at till.com> wrote:
> I think you're describing a tunable heterodyne filter.

I've seen lock-in amplifiers described as homodyne filters,
specifically to contrast them with heterodyne filters.


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