breadboarding fast, tiny stuff

[Martin Griffith]

and then some!

http://xkcd.com/378/


Cheers
Terry (who doesnt wear a watch, as one nearly got him killed)

Never been a Gamer, but Today's XKCD was sureal, one of the best


martin

 

[Terry Given]

Never been a Gamer, but Today's XKCD was sureal, one of the best


martin

He's the best techie cartoonist. Damn that emacs! I await the next
Richard Stallman cartoon

Cheers
Terry

 

[Martin Griffith]

He's the best techie cartoonist. Damn that emacs! I await the next
Richard Stallman cartoon

Cheers
Terry

Futurama has some goodies as well


martin

 

[Spehro Pefhany]

He's the best techie cartoonist. Damn that emacs! I await the next
Richard Stallman cartoon

Cheers
Terry

Coincidentally, I just choked on my coffee over this older one:
http://xkcd.com/344/
"Ah, so you haven't read the DMCA.:

He's the new Scott Adams, just as surely as Python is the new BASIC.



Best regards,
Spehro Pefhany

 

[oopere]

Take a look at the NL37WZ16 triple buffer. With all three sections in
parallel, it will put 5 volts into 50 ohms in about 600 ps. Some of
the LVDS-to-ttl receivers are about that fast, but not quite so fierce
a drive.

Thanks again for the info, John.
I have been looking at the NL37WZ16 datasheet, but can't infer the 600ps
figure from anywhere. Either I am blind or the only mention to rise and
fall times is in Fig.3 where it says 2.5ns. It seems that OnSemi does
not have any faster triple buffers in that series either. Perhaps this
is an "undocumented" behavior when you connect the outputs together?
There is no mention to such low output impedances either (500R is the
lowest that appears) although the 24mA output sink and source capability
per output suggest somewhat lower values.

The spec sheet typ EP05 risetime is 130 ps. These things aren't
schmitts but they do have very high voltage gains, so they don't need
a super-fast input edge. Something pokey like 1 volt per ns should do
fine.

John

I will try as soon as I get some!

Pere

 

[Martin Griffith]

Coincidentally, I just choked on my coffee over this older one:
http://xkcd.com/344/
"Ah, so you haven't read the DMCA.:

He's the new Scott Adams, just as surely as Python is the new BASIC.



Best regards,
Spehro Pefhany

That's brilliant, I like this one
http://xkcd.com/273/



martin

 

[John Larkin]

Thanks again for the info, John.
I have been looking at the NL37WZ16 datasheet, but can't infer the 600ps
figure from anywhere. Either I am blind or the only mention to rise and
fall times is in Fig.3 where it says 2.5ns. It seems that OnSemi does
not have any faster triple buffers in that series either. Perhaps this
is an "undocumented" behavior when you connect the outputs together?
There is no mention to such low output impedances either (500R is the
lowest that appears) although the 24mA output sink and source capability
per output suggest somewhat lower values.

The risetime isn't spec'd. Fig 3 refers to propagation delay; I
suppose Tr and Tf refer to the input, not the output. The typical Voh
and Vol values hint at the drive capability of three sections in
parallel.

John