multiplier filter

[jh]

>Actually, I don't think it would be as good for musical purposes, because
>the MC1495 multiplier has a voltage input, with probably several millivolts
>of input offset.  That may cause errors when the filter is set to low
>frequencies, and is the same problem you run into with linear VCOs.  

... and the filter might even lock up when the offset voltage changes
the active quadrant of the 4Q multiplier, I guess.

JH.