[sdiy] CMOS CD4046 ring mod??

[Tom May]

I think I was thinking of the 565 PLL, not the 4046.

Phase comparator 2 in a 4046 is not a multiplier, it's a digital
leading edge sensor thingy, there's a state diagram for it in the
Motorola CMOS Logic databook (or the Fairchild doc at
http://www.fairchildsemi.com/ds/CD/CD4046BC.pdf) which makes sense if
you step through it.

Tom.

Tom May <tom at tommay.net> writes:

> I remember seeing a copy of Craig Anderton's Electronic Projects for
> Musicians in about 1981 which had a ring mod using a 4046, after
> someone tipped Craig off to the built-in multiplier.
> 
> Tom.
> 
> media at mail1.nai.net writes:
> 
> > I keep reading descriptions of the Type II phase discriminator as a
> > "balanced mixer" or "four-quadrant multiplier" -- descriptions that are
> > also used to describe a ring modulator.  So has anyone ever built a ring
> > mod using a 4046??  Even it it only worked with pulse waves, it might be a
> > nice add-on if one were already using a 4046.