madengr

106 ms·

451.
by madengr 7y ago
I think it’s more of a power dissipation issue. The amount of charge, thus current, you are moving in and out of the gate capacitance is proportional to clock frequency. Sine power is I^2*R, then it is proportional to f^2. Smaller transis
452.
by madengr 7y ago
The time domain codes work well with GPUs and multiple cores, but the frequency domain ones don’t. I don’t know enough of what’s going on under the hood, but it’s like that for all of them.
453.
by madengr 7y ago
It’s electromagnetic simulation, specifically finite element. You can parallelize some of the math, but mostly not. You can break the structure into smaller sub-domains, but that has issues too. Not much gain beyond 2-4 cores.
454.
by madengr 7y ago
I’d like a higher clock frequency, as the software I use does not scale well across cores. Things have been stuck sub 4 GHz for many years.
455.
by madengr 7y ago
The SX1276 will do 9380 bps at its lowest sensitivity, so it could be boosted, depending on range. FSK mode will go much faster. I wonder if these disaster radios will auto negotiate rates.
456.
by madengr 7y ago
You wouldn’t get much fallout from EMP. It has to be an upper atmosphere detonation to get the EMP.
457.
by madengr 7y ago
Yeah, you’ll get a 7 to 7 job.
458.
by madengr 7y ago
Liabilities in need of replacement by robots.
459.
by madengr 7y ago
Wonder how he got ahold of a document marked “confidential”, assuming it was actual national security information, and not “company confidential”. Either an insider passed it too him, or poor security practices at employer.
460.
by madengr 7y ago
There seems to be a lot of bullshit that people are investing in, which I suppose is fine if you have money burning a hole in you pocket. Things like uBeam, and the Tesla Wardenclyff wireless power thing in TX, come to mind.
461.
by madengr 7y ago
The article doesn’t mention if he had a security clearance when working for the defense contractor.
462.
by madengr 7y ago
How do other countries compare, specifically Asian, urban areas where street food is ubiquitous?
463.
by madengr 7y ago
It’s a whole different argument as to San Francisco productiveness. Is twitter productive? I’d call it a waste of time.
464.
by madengr 7y ago
There are as many millennials as boomers, whereas gen X is about 10 million less than either group. I’d like to know what they are going to do with all the old-folks homes that are going up.
465.
by madengr 7y ago
Nope. Porn.
466.
by madengr 7y ago
Cheaper than running electricity, which was already done 60+ years ago.
467.
by madengr 7y ago
Sorry, I don't believe it. I just sold my GM stock at 10% loss. I bought it thinking they were actually going to invest in EVs and self driving. Instead they have been pumping out trucks and SUV, while killing the Volt. Screw GM; th
468.
by madengr 7y ago
I bicycled to work for several years. Mostly cars full of shit-head teenagers that do that. The really strange one was 5 AM on a 4 lane street, no other cars around, and a single car comes up behind me and starts honking, about hitting my
469.
by madengr 7y ago
Probably under the table. I made $4/Hr in 1988 as a bus boy, etc. The entire kitchen staff, but one, was paid directly from the cash register at the end of the night. The couple that owned that restaurant sold it for several $M.
470.
by madengr 7y ago
I have given up on IBU for predicting hoppiness. After a brewery tour, they said IBU is all subjective, with no quantitative measurement (unlike Scoville units for hot sauce). After home brewing, I have never had a bad batch. I just use s
471.
by madengr 7y ago
They weren’t called NINJA loans for nothing; No Job No Income no Assets. I don’t think they were lying about anything.
472.
by madengr 7y ago
“No person has ever been harmed or exposed due to undue risk in over 26,000 test flights with over 100 prototype vehicles,” Well that isn’t exactly difficult to achieve if no one was on it. I’d like to know the data if it was carrying a cr
473.
by madengr 7y ago
They’ll just switch to carfentanil if fentanyl is stopped. The spice must flow.
474.
by madengr 7y ago
My daughters teacher was monitoring her and her friend instant-messaging each other on school issued laptops. The got around it by using a Google doc to chat in real-time.
475.
by madengr 7y ago
Back in the early 90’s, I did this in college. Mounted an X-band Gunn oscillator behind the front grill. Fun watching people hit their brake lights when I flipped the switch.
476.
by madengr 7y ago
I was thinking in terms of RF amps. Cree was making SiC FETs several years ago, but I think it’s all GaN on SiC now. There was a SiC fab in CA making RF parts, but I think they went belly-up. All the SiC FETs topped out a 2.5 GHz. How do
477.
by madengr 7y ago
Faster switching speed for the equivalent breakdown, at least from an RF amplifier perspective. SiC was an interim until GaN was developed, and is essentially obsoleted now. What’s interesting is how the DOD heavily invested in GaN technol
478.
by madengr 7y ago
GaN has a higher breakdown voltage than Si, and a higher drift velocity, which allows a faster switching speed (for the equivalent bias). For power supplies and switched mode RF amplifiers, you need to switch the transistor on and off as fa
479.
by madengr 7y ago
Yes, they are cheap now, that’s why beer would be the better comparison.
480.
by madengr 7y ago
That’s just due to cost cutting (poor shielding). GaN will allow a faster slew rate (higher break down voltage), so emissions will actually become worse. The FCC needs to enforce emissions regulations. I remember when PCs (even the C64) h

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