[sdiy] LM13700 questions

[Stewart Pye]

On 8/17/2012 5:31 PM, David G Dixon wrote:
>> The application I have in mind is voltage control of
>> modulation amount.
> This is a classic VCA application.  Why not just apply the voltage to one
> OTA?  Why do you need two?

It's for a hand clap circuit. One half of the LM13700 will be the audio 
VCA, the other half will have a "velocity" input going to its Iabc pin, 
and the clap envelopes to its input. So I basically have and audio VCA 
with a voltage controlled amount for the envelope input. I'll be using 
another LM13700 package for the "reverb" section.

Regards,
Stewart.