[sdiy] easiest ringmod circuit for multiple inputs/nulling??

[Dan Snazelle]

thanks for the info!!



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> From: pfperry at melbpc.org.au
> To: Synth-diy at dropmix.xs4all.nl
> Subject: RE: [sdiy] easiest ringmod circuit for multiple inputs/nulling??
> Date: Wed, 6 Aug 2008 12:55:51 +1000
> CC:
>
> If the inputs have different amounts of DC offset, then you will get
> different amounts of carrier bleed.
> If you are able to send the various sources through caps, and the output end
> of the cap is grounded via say a 100K resistor so that it stays at an
> average of 0V, then you should be OK as you switch from one to another.
>
> And, yes, the PCB will be better than a breadboard.
> But even so, a ring modulator is a very hard thing to make perfect.
> Some people cheat & have a noise gate to cut out the bleed during silent
> parts.. but I find careful layout & decoupling the carrier oscillator (I use
> a couple of 220 ohm resistors in the power rails, plus filter caps before
> and agter them.)
>
> Paul perry Melbourne Austrlaia (Frostwave)
>
>
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