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On Thu, 9 May 2024 22:16:53 +0200, Jeroen BellemanInteresting chip, indeed. Just the sort of thing to build fast
<jeroen@nospam.please> wrote:
On 5/9/24 19:38, john larkin wrote:Left rear, blue shirt, behind The Brat.On Thu, 9 May 2024 19:09:14 +0200, Jeroen Belleman>
<jeroen@nospam.please> wrote:
>On 5/9/24 17:29, bitrex wrote:>On 5/9/2024 10:06 AM, John Larkin wrote:>
>>And I can integrate some other functions, too. Look at all the fun parts>
you get for 40 cents in small quantity. These things have been solid
money-makers for me so far
>
People keep re-inventing the "analog FPGA" but none seem to have been
successful. There must be some deep fundamental reason why.
More briefly, asynchronous mixed-signal design can be annoying as you've
probably experienced. Have to even more carefully consider timings and
race conditions, the lull between clock edges can't save you.
I *like* to use asynchronous state machines in my designs from
time to time. It's not really so different from synchronous
design, and it's a natural solution in many situations. It's
just that setup and hold times apply to more inputs than just
a clock.
>
Jeroen Belleman
Most of us did async logic when we were kids, before we found out
about proper state machines and metastability and such.
>
There are occasional fads for async logic (Intel had one) but they
don't seem to stick either.
>
People manage to screw up synchronous state machines too!
>
I recently did a box full of GigaComm picosecond logic, async of
course. A laser modulator. It got us a VIP tour of NIF, with free
lunch.
>
https://www.dropbox.com/s/m8zc7g56jul39d0/NIF_Tour-Highland%20Tech%20group%20photo%20TC.jpg?raw=1
>
Nice. Which one is you?
>
Jeroen Belleman
NIF is great to work with. Friendly, collegial, smart. They are
physicists who appreciate good electronics.
The masks are partly covid, part because it's a rather large clean
room.
One great discovery on that project was the Micrel SY88022 laser
driver. It's good for a lot more than driving lasers.
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