moog hp

jh jhaible at primus-online.de
Tue Mar 30 01:35:21 CEST 1999


>Can you offer any suggestions for a transistor matching procedure that will
>match NPN and PNP pairs?  Will the Moog matching technique work?  (as
>published in the Minimoog service manual)

I think so. Never done it, however.

>How about matching diodes?  Do you have a special technique for this?  

It *should* be easy, just measuring the forward voltage at a constant current
(current source, or high voltage + large resistor) and (important !) constant
temperature. Do it at one current value = good; do it for two different
currents = better.
But I have not done it either. I trusted in the law of large numbers, and
aparently I was lucky with unselected diodes in the Synthi VCF and
HiFli Phaser. 

JH.



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