[sdiy] Yamaha IG00159 internals

ChristianH chris at chrismusic.de
Wed Jan 18 10:47:37 CET 2017


There is a block diagram in 
https://archive.org/stream/synthmanual-yamaha-ic-guide-book/yamahaicguidebook#page/n39/mode/2up
page 41

It's more or less what Mattias wrote, a single rate-voltage circuit that
is dynamically reconfigured for the 3 env stages using a bunch of
switches.

Chris



On Tue, 17 Jan 2017 08:05:36 -0500 Nicholas Keller
<niroke at tampabay.rr.com> wrote:

> Does anyone know of an internal diagram for the IG00159 amp EG chip?  Or has someone made a stand-in circuit for the chip alone?
> 
> Thanks 
> 
> Nick
> 
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