[sdiy] 80017A VCF/VCA chip

[Tom Arnold]

On Sun, May 25, 2003 at 09:44:50AM -0400, andy wrote:
> 
> 	Hi roman,
> 
> 	here's the pinout I have for the 80017A/800170 chips:
> 
> 	pin 1 is the one all off by itself, the rest follow sequentially:
> 
> 	1. VCF IN (audio)
> 	2. RESO CONTROL
> 	3. VCF OUT (audio)
> 	4. +15v
> 	5. -15v
> 	6. VCF CONTROL
> 	7. GND 1 (this is the VCF gnd)
> 	8. GND 2 (this is the VCA gnd)
> 	9. VCA IN (audio)
> 	10. VCA OUT (audio)
> 	11. VCA CONTROL
> 
> 
> 	Inside the epoxied package is an IR3109 chip and two BA662 chips.
> The first 662 is hooked to the "RESO CONTROL" input, and controls the
> feedback loop around the IR3109. The second 662 is not linked to the VCF
> at all, and is used as a VCA.
> 
> 	andy

And if it helps, here's a pinout of the IR3109 :
http://www.synth.clara.net/images/IR3109VCF.gif

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