On Thu, 9 May 2024 11:46:31 -0400, bitrex <user@example.net> wrote:
On 5/9/2024 11:33 AM, John Larkin wrote:
On Thu, 9 May 2024 11:09:26 -0400, bitrex <user@example.net> wrote:
On 5/9/2024 10:06 AM, John Larkin wrote:
On Wed, 8 May 2024 23:35:28 -0400, bitrex <user@example.net> wrote:
On 5/8/2024 10:04 PM, John Larkin wrote:
On Wed, 8 May 2024 19:40:49 -0400, bitrex <user@example.net> wrote: >>>>>>>
On 5/8/2024 6:32 PM, john larkin wrote:
On Wed, 8 May 2024 17:15:27 -0400, bitrex <user@example.net> wrote: >>>>>>>>>
On 5/8/2024 10:28 AM, John Larkin wrote:
Jill Biden reportedly told her husband some time ago to “Stop it, Joe,
stop it now.” Good advice that he continues to ignore — at his peril,
and ours.
https://mondoweiss.net/2024/05/genocide-joe-is-beginning-to-stink-like-lyndon-b-johnson/
What's your favorite SiC mosfet?
Why no buy WOLFSPEED:
<https://www.mouser.com/ProductDetail/Wolfspeed/C3M0280090D?qs=nxZbHzLpdvfcUe1hs5VeOQ%3D%3D>
What's wrong with that one?
I've used C2M0280120D and it works fine. Gate drive is a nuisance, but
that's true for all pure SiC parts.
Ope, I meant to write "why not buy...", it looked like a nice part. More
standoff voltage than I'm accustomed to requiring for most projects, >>>>>>>> though.
I may have a need to roll my own hysteric synchronous buck soon, at an >>>>>>>> astounding 12V..
That's not SiC territory. Possibly GaN if you want a tiny MHz
switcher.
SiC has amazingly low capacitances compared to high-voltage silicon. >>>>>>> But the gates have to swing to levels like +15 and -5. Fast.
Why design a switcher, unless it's for fun. You can get a whole 2-amp >>>>>>> buck switcher, great internal reference, current and thermal limited, >>>>>>> spread spectrum, for 19 cents.
Indeed there's lots of stuff off the shelf but for the application I >>>>>> have in mind the it's is acting more like a low frequency
self-oscillating Class D, tracking a control voltage.
I have two current designs where I muck the feedback node of a
spread-spectrum switcher chip to use it as either a programmable power >>>>> supply, or an amplifier.
The simple one powers about 130 12-volt relays. We run them at 12
volts whenever we reprogram them, and after a few milliseconds drop
down to 8 volts to save power.
Eventually some damned IC jock intgrates our fun circuits.
It's the future now, we can design our own mixed-signal ICs at the local >>>>>> Starbucks, the IC jocks don't have to have all the fun.
<https://www.renesas.com/us/en/document/dst/slg46140-datasheet>
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 AFbeen
successful. There must be some deep fundamental reason why.
Inertia? Have to use your brain?
OTP on a leadless package isn't appealing.
A fierce uP with flash memory and some ADC and DAC channels is more
useful.
There aren't a lot of fierce uPs at the price, not ones with
well-documented tookits and APIs in English, anyway.
RP2040.
Actually I probably don't need anything as complicated as an integrated >>buck converter controller, anyway. Hard to believe this topology is >>patented but I guess so long as I don't use something similar for
"digital audio"??
<https://patentimages.storage.googleapis.com/95/9c/87/a0741208b77066/US20070210861A1.pdf>
That's crazy. It's obvious, trivial, and ancient.
But the US Patent Office is a revenue center now.
On 5/9/24 22:35, john larkin wrote:
One great discovery on that project was the Micrel SY88022 laser
driver. It's good for a lot more than driving lasers.
Interesting chip, indeed. Just the sort of thing to build fast
samplers or TDRs with. Thanks for the tip.
Am 09.05.24 um 23:19 schrieb Jeroen Belleman:
On 5/9/24 22:35, john larkin wrote:
One great discovery on that project was the Micrel SY88022 laser
driver. It's good for a lot more than driving lasers.
Interesting chip, indeed. Just the sort of thing to build fast
samplers or TDRs with. Thanks for the tip.
I'm not too impressed. We had that kind of performance in our 10G
XFP Infineon fiber optic transceivers, from Gennum and Infineon Semi
20 years ago. The fiber optic division was sold to Finisar then.
I spent nearly a month in San Jose for Tech transfer with 4 other
people. Me, just a lowly freelancer.. But it was interesting. :-)
There seems to be a wall at 25 ps.
Has anybody here played with nonlinear transmission lines?
I tried with Spice, but with discrete devices I did not get
very far. PSPL seems to have been the king of these before
they were eaten by TEK.
Gerhard
(BTW I echoed your Thorium transition post to timenuts.)
What has that to do with uk.comp.sys.mac and pro wrestling ????
On 8/05/2024 10:48 am, NefeshBarYochai wrote:
<snipped the usual toxic nonsense>
Why does this right-wing idiot continue to cross-post his nonsense here?
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