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Path: ...!news-out.netnews.com!postmaster.netnews.com!us12.netnews.com!not-for-mail X-Trace: DXC=>BfRJJ1@3`aVdjTg8X4VmjU5[F2hIijDo7J470dMQQ7kbnl:Bh6K7Qb_a3f0Ymho:`]IN>giX<H<bU8:;CUQY0afUh:ZAVm]2id1NI1l8fb?fnXlnNGcjcaFd X-Complaints-To: support@frugalusenet.com Date: Thu, 9 May 2024 11:46:31 -0400 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Genocide Joe is beginning to stink like Lyndon B. Johnson Newsgroups: rec.sport.pro-wrestling,rec.arts.tv,uk.comp.sys.mac,edm.general,sci.electronics.design References: <rnil3jlb80opqrhuj0l68tsm4b5c7mgnvb@4ax.com> <fv2n3jp854s3b3svugvo6cei33hthqt3et@4ax.com> <663beb6f$0$8094$882e4bbb@reader.netnews.com> <57vn3jh7rj8avvop51ocgcqt2697gbe01o@4ax.com> <663c0d82$0$8477$882e4bbb@reader.netnews.com> <1dbo3jd021lv1j79d8c1mn375dtqneb1io@4ax.com> <663c4480$0$6430$882e4bbb@reader.netnews.com> <mdlp3j11sqmj8na5vpd2kash0g4itvsf3r@4ax.com> <663ce726$0$7070$882e4bbb@reader.netnews.com> <q3rp3jdlfjvsd149lqu2c83rmr1jb8882m@4ax.com> Content-Language: en-US From: bitrex <user@example.net> In-Reply-To: <q3rp3jdlfjvsd149lqu2c83rmr1jb8882m@4ax.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Lines: 105 Message-ID: <663cefd7$0$7067$882e4bbb@reader.netnews.com> NNTP-Posting-Host: 127.0.0.1 X-Trace: 1715269591 reader.netnews.com 7067 127.0.0.1:42819 Bytes: 5342 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>