[sdiy] XOR as 'digital' ring modulator

[ASSI]

On Tuesday 09 November 2010, Tom Wiltshire wrote:
[...]
> This looks to me like it's a perfect ring mod (multiplication function)
> as long as you stick to digital signals, square or otherwise. 

...for a special encoding (0-->-1 and 1-->1) and single bit signals.

> So XOR
> could multiply two PWM'd pulse trains no problem according to me, but
> not according to Chamberlin.
> 
> So what am I missing?!

Maybe that the term "square wave" doesn't necessarily imply 50% duty cycle?


Achim.
-- 
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