The 159 is a linear timing/voltage sequence generator that uses the
exponential input of the 151 to create the exponential sloped envelopes.
Crow
/∗∗/
On 11/15/2011 9:16 PM, elie wrote:
> Hi, I'm implementing a CS-80 Ring Modulator design on another Yamaha Synth. No problem getting the Modulator& buffer amps, VCO chip but the VCA (IG00151)and Envelope Generator (IG00159) are not practical to purchase.
>
> My question is if the VCA and Envelope Generator are Linear or Exponential in function?...not sure if the service manual might answer that so just in case anyone knows?
>
> Thanks!
> Elie
>
>