formant rfm

Dr. Jörg Schmitz JSchmitz at patho.bonn.com
Mon Nov 22 08:24:09 CET 1999


Hi all,

is there anyone who knows, why the input- and output stage of the
formant resonant filter module is built up with a LF356 and LF357 ?
I tried it, and with the 357 as the summing OP-amp, there is only 
HF-Noise. With a 741, it works pretty well.

So, why a 357 and not a 741 ????

J.S.
________________________________________
Dr. J. Schmitz
http://www.patho.bonn.com
http://members.xoom.com/jmschmitz
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