Am 28.01.2015 um 01:57 schrieb Charles Steinmetz:
(again, not many of us amateur time nuts). Once upon a time, Motorola
made monolithic quad BJTs -- but I'm not aware of any matched quads
similar to 2N2222s at this time. [Several manufacturers still claim
to make MPQ2222s, but those are not monolithic and not matched.]
There still are
< http://www.analog.com/static/imported-files/data_sheets/MAT04.pdf >
<
http://www.intersil.com/content/dam/Intersil/documents/hfa3/hfa3046-3096-3127-3128.pdf
>
if duals are enough:
< http://www.analog.com/static/imported-files/data_sheets/SSM2220.pdf >,
< http://www.analog.com/static/imported-files/data_sheets/MAT12.pdf >
also mat02, mat03, maybe SSM2110,
I have used most of them :-)
<
https://picasaweb.google.com/103357048842463945642/LowNoisePreamplifiers?authuser=0&feat=directlink
>
regards, Gerhard
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