5 May
2012
5 May
'12
3:40 p.m.
On May 5, 2012, at 4:44 PM, Tony Duell wrote:
Indeed, I wasn't surprised; it's a high-gain, symmetric, inverting
amp. I was surprised that it was included in the app note for a
digital device; the Nintendo schematic was the first time I'd seen
it used as analog. This was quite a few years ago.
- Dave
On Apr 30, 2012, at 2:46 PM, Chuck Guzis wrote:
IIRC the 74HCU04 is just complementary pairs of MOSFETs, so it';s not
suprising it works as an amplifier. I've seen similar things (possibly
usign the 4069UBE) used as the tape input circuit on older microcomputers. Motorola also offered a bubble-pack of assorted
milliwatt RTL TO-100
devices as part of their experimenter's kit line. (Fat chance of
that ever happening again!). The little booklet that came with it
was interesting in that perhaps as many linear applications were
described as digital ones.
That's pretty neat! The 74HCU04 datasheet (the Philips/NXP one,
anyway) has an application circuit for it as a "poor man's amp",