[sdiy] LM394 vs. MAT02 vs. ?

Scott Gravenhorst music.maker at gte.net
Mon Nov 8 23:52:25 CET 2004


=?ISO-8859-1?Q?Ren=E9_Schmitz?= <uzs159 at uni-bonn.de> wrote:
>Hi Scott and all,
>
>Scott Stites wrote:
>> Rene's VCO4069 uses an NPN/PNP pair. But, maybe was inspired by 
>the ARP design? =0) In any event, it does deliver an expo 
>response. 
>
>The Minimoog Filter used a similar convertor as well. Sure it has been 
>inspired by ARP and Moog. I had my doubts about the octave purity of 
>this circuit as well, and I have to say that I was pleasantly surprised, 
>especially if you consider the means involved. The question is what you 
>compare it against, if you take a 3046, then the much lower Rbe of the 
>discreet transistors is a plus for the NPN/PNP circuit, and if you look 
>into the MAT02 direction, then surely they are out of competition.
>The big question is what you find acceptable, and thats one thing that 
>everyone has to decide for oneself.

How does one match NPN and PNP like 2N3904 and 2N3906?  (sorry if I missed
this)...



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