[sdiy] XOR as 'digital' ring modulator

[Harry Bissell]

I think the Odyssey used NAND gates configured as an exclusive-or (or nor, who cares ? :^)

H^) harry



----- Original Message -----
From: Dave Leith <dave.leith at gmail.com>
To: SDIY <synth-diy at dropmix.xs4all.nl>
Sent: Tue, 09 Nov 2010 17:33:41 -0500 (EST)
Subject: Re: [sdiy] XOR as 'digital' ring modulator

not sure but isn't this what the ARP Odyssey uses for a ring mod or
maybe it's 2 nand gates

On Tue, Nov 9, 2010 at 2:18 PM, Colin f <colin at colinfraser.com> wrote:
>
>> > You can't modulate the polarity without modulating the amplitude.
>> > The polarity is the sign of the amplitude.
>>
>> Yes, and therefore you are modulating the "sign" and not the
>> "amplitude".
>
> Well if we want to get pedantic about it, when you invert the sign of a
> square wave with anything other than a perfect duty cycle of 50%, you shift
> the DC level, so you would change the RMS amplitude.
> Depends on which definition of amplitude you're using.
> But I know what you mean.
>
> Cheers,
> Colin f
>
>
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-- 
Harry Bissell & Nora Abdullah 4eva