"Roy J. Tellason" wrote to "Mike Ross" (01-01-03  20:10)
 --- on the topic of "DIGITAL CLOCKS"

 MR>  the Miller multiplication

 RJT> I've heard the name before,  but forgot about it because
 RJT> that sort of thing doesn't usually enter into what I'm
 RJT> dealing with.  I wonder if that's perhaps responsible for
 RJT> the otherwise odd design of TTL inputs?  I'll bet that
 RJT> characteristic makes it harder to design RF amplifier
 RJT> stages,  too,  something I've never really had much of a grasp of.

In RF work reactive components are swamped out by using lower impedances
or by adding the opposite sign (i.e. LC) for resonance as for example
an oscillator circuit would. The input/output capacitances tend to be
treated as parasitic lumped constants and get included with the actual
components used.


 RJT>   I'm not real clear at the
 RJT> moment as to what sort of effects come into play when you
 RJT> start to forward bias a junction,  though.  It's been
 RJT> *years* since I reviewed any of this stuff...

It's true for a lot of stuff but it often just takes a little brushing
up to get with it again. Just today I took out the sheet music and
plucked a few guitar studies, sight reading as I played which I hadn't
done in a few months. It was hesitant at first but it quickly came back.
I didn't attempt Recuerdos De Alhambra however.... yet! 

I'd heard that old memory gets replaced with newer stuff but I'm not so
sure about that. The human brain really does seem to have limitless
storage. Heard a theory that memories aren't actually stored in our
brains, and that our brains are just antennas or terminals linked into a
larger universal mind where all human knowledge resides. I don't believe
this but it's a decent alternative description.


 RJT> I remember when articles about stuff used to go into all sorts of
 RJT> aspects of  how semiconductors were fabricated,  both discrete devices
 RJT> and chips.  And back then I used to really wonder what the
 RJT> heck difference it made to most of us,

What happens when those who designed the black boxes are gone? Good
question! Reminds me of the old "Starlost" scifi Tv series where a group
of people were living an agrarian type lifestyle on an interstellar
generational ship which was headed on a collision course with a star.
The descendants of the original crew were simple farmers which didn't
even know they were on a ship until they accidentally found out and had
no idea how the ship worked yet they were determined to alter its course
and save their pod "worlds" once they became aware of their predicament.

 Mike
 ****

... Whip me, Mistress Lisa, whip me... OOPS! ...wrong echo.

--- Maximus/2 3.01