[sdiy] ETI447

[Paul Perry]

At 07:46 PM 7/07/04 +1000, Ken Stone wrote:
>>I have some questions about this circuit. I think that the use of IC9, a
>>4049 CMOS, are quite smart, but why are pin 16 connected to zero reference
>>voltage?
>because the chip is not being used as a digital chip. It is being used as a
>row of FETs. (a case of using it in a way it was not designed to be used)
>
And not only that, some ETI synth stuff from the same time, would only
work if you used the SAME CHIP MAKER as they did.
Which is what can happen, if you are usign stuff out of data sheet range ;D

Enven 'simple' things like input protection schemes can make a fatal difference.

paul perry Melbourne Australia