[sdiy] Yamaha IG00159 internals

Ullrich Peter Peter.Ullrich at kapsch.net
Wed Jan 18 10:58:37 CET 2017


Here is the chip as NOS for 55$ - maybe interesting for you...
http://crazyanalog.com/part.htm

Ciao
Peter

-----Ursprüngliche Nachricht-----
Von: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] Im Auftrag von ChristianH
Gesendet: Mittwoch, 18. Jänner 2017 10:48
An: Synth-diy at synth-diy.org
Betreff: Re: [sdiy] Yamaha IG00159 internals

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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