discrete transistor computer

5 May 2012

...
   That's
pretty neat!  The 74HCU04 datasheet (the Philips/NXP one,
 anyway) has an application circuit for it as a "poor man's amp", 
IIRC the 74HCU04 is just complementary pairs of MOSFETs, so it';s not
 suprising it works as an amplifier. 
If I've got my nomenclature straight, the 'HCU04 is specifically
designed for use in analog circuits - "such as crystal oscillators", as
one datahseet I saw put it - so it's hardly a surprise that it works to
use it as an inverting analog amplifier.  Probably not a particularly
linear one, but if its gain is high and it isn't hysterical - er,
doesn't exhibit hysteresis, that is :-) - then throwing a feedback loop
around it will linearize it substantially as well as providing much
better control over the overall gain.

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discrete transistor computer