[sdiy] AD633

[Neil Johnson]

Hi all,

David wrote:
> Yes, I have an idea.  Use linearized 2164 to make your multipliers for the frequency shifter.  I have a nifty little design I could send you which doesn't require any trimming, and gives very accurate balanced multiplication with a minimum of parts and fuss.

Yes, it's a nice application of the linearised 2164.  Any half-decent
linear VCA can be used in this way.... check out Figure 24 in the
LM13700 datasheet:
http://www.ti.com/lit/ds/symlink/lm13700.pdf

For more cookbook examples, try page 50 of ETI from May 1982 which has
some circuit ideas from Tim Orr:
https://www.americanradiohistory.com/Archive-Electronics-Today/80s/Electronics-Today-1982-05.pdf

Cheers,
Neil