[sdiy] sdiy, real ring modulator schematics

[patchell]

    This is a case of "be careful what you ask for, because you might
get it" :-)

    I thought I had posted a circuit on my web page that used a CA3280
to make a balanced modulator.  If I find it, I will post it.

    You can also use an AD633 as a balanced modulator.  On page 10 of
http://www.silcom.com/~patchell/smb1/smb.pdf

    Over in the right hand corner, you will find a basic AD633 circuit.
You might want to add offset controls to the inputs to improve carrier
supression.

    I also thought, at one time TomG had a balanced modulator circuit
using the MC1496 (I think thats right) balanced modulator chip.

    You can also make one out of a single CA3080, or 1/2 of a CA3280 or
LM13700 (these would be a little lower performance that the one I was
thinking of above, but they are simpler to make).  Seems like somebody
else had this circuit on their web site as well.

Glue Sniff wrote:

>  When I said I was looking for "real ring modulator
> schematics",I meant one that accepts two inputs and
> then outputs the sum and difference of the two inputs.
> from what I understand balanced modulators only accept
> one input and they use an internal frequency as the
> second sound source and then output sum and
> difference. I have read that the sound is essentialy
> the same. but I wouldnt think this to be true if the
> two input instruments were different instruments or
> sounds. having the sum and difference of two inputs is
> what I am looking for if there is a bananced modulator
> out there than can do this then thats what I am
> looking for.
>
> Thanks.
>
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--
 -Jim
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