[sdiy] 1496 VCA?

[HOSHUYAMA]

Hello Dave,

To get zero gain for zero CV, these VCAs doesn't need trimpots
because they are 2 quadrant multipliers.
To reduce CV feedthrough, I'd use ones because
in most VCAs and ring modulators, trimpots are used.

Best regards.

Dave Manley wrote:
> This looks very interesting (too bad I'm at work and
> can't study it!). When using a real device will you
> still need trim-pots to get zero gain for zero CV?
> 
> -Dave
> 
> P.S. I'm a big fan of LTspice also.
> 
> 
> HOSHUYAMA wrote:
> > Hello List,
> > 
> > I designed VCAs and a exponential converter using 1496s.
> > (Not the International Modular)
> > They worked well on LTspice.
> > 
> > VCAs with short English explanation:
> >   http://houshu.at.webry.info/200806/article_3.html
> > Exponential Converter: 
> >   http://houshu.at.webry.info/200806/article_4.html
> > 
> > I hope some of you enjoy the idea.
> > 
> > Sam HOSHUYAMA
> > Saitama, JAPAN
> > 
> > Tom Arnold wrote:
> >> While looking through the International Modular book ( thanks Loscha! ), I
> >> noticed that the VCA was 1496 based.  A little more digging around online
> >> also shows the PAIA 9700 VCA is 1496 based.  I'm assuming there is some
> >> reason they arn't used more often considering how simple the circuits are
> >> and how cheap the 1496 is.  If anyone is interested in the circuit, its on
> >> PDF page 26/booklet page 28 left side.  34 parts at about a total cost of
> >> $3.  Really inexpensive.
> >>
> 
> 
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