A high power RF LDMOS transistor

Wonder if they'd make good bootstraps.

Cheers

Phil Hobbs

GaN fets tend to be power-ish parts, although some GaN MMICS are starting to appear. Their Gm is high and Cdg is low. They behave very well. But I'd expect, wild guess, more LF noise than a jfet.

Have you tried PHEMTS, like the Avago ATF series? Those might be better for smaller apps.

If Trump gets elected and actually proceeds to carry out what he's promised, I'll give him 3 months before he gets whacked - by someone with your mentality and with Hitlary's blessing - and Pense takes over. Then it'll be back to business as usual. :-(

It'll be business as usual from day 1. He won't get any policy implemented because he would have to persuade people and that's hard to do when you can't form a lucid sentence. If he claimed to have laringitis and his kids had to speak for him then he'd do very well.

It amazes me how people failt to understand why he flipped on immigration. The US Chamber of Commerce wants more immigrant labor. They are part of the establishment Trump claims to oppose, but which he has been in bed with for months.

Trump either getting elected, or doing any of the things he's promised to d o - he's promised enough different things that he couldn't possibly do them all, since some of the promises are self-contradictory, are both such impr obable events that nobody in their right mind would waste time thinking abo ut them.

Cursitor Doom seems to think of nothing else. He'll find the aftermath of t he election very depressing.

Sure--I quite like the ATF38143, 55143, and SKY65050. Their flatband noise is only 0.3-0.4 nV/sqrt(Hz), and C_iss is under 1 pF. The bad news is that their 1/f corners are 10-30 MHz. That's okay in a ~100 MHz bandwidth TIA, because the omega e_N C noise drops faster than the 1/f noise climbs, so you still win.

A few years ago I did a biochip front end for Samsung's research division that was within 6 dB of the shot noise of 1 nA in 100 MHz. (I posted an LTSpice approximation of it here awhile back.)

It uses an ATF38143 cascoded by a BFP640 SiGe:C NPN, which makes an almost perfectly unilateral block with V_A of ~1 kV. I just dumped the input current into the gate with a ~100 kHz DC restore loop, let the first stage do whatever it liked, and fixed it up in the second stage to get a nice step response. (Pro tip: use a Murata BLM18BB010 bead in the base of the BFP640. Its Z holds up well into the GHz, unlike many.)

They still didn't have enough SNR for their measurements--100 MHz corresponds to a 5-ns boxcar, and 1 nA times 5 ns is only 31 electrons.

There's this potentially interesting part:

It's a 100V, 500 mA part with 7 pF C_iss and 2 ohm R_DSon, and costs a buck in onesies. If the 1/f noise isn't too brutal, and its high frequency noise behaviour is more like a JFET's, that's a potentially nice bootstrap for us pour-on-the-coal types.

Cheers

Phil Hobbs

The EPC guys called on us, and my kids are eager to design something around their parts, especially the smaller ones. Production says they are just another BGA, no big deal.

You and I seem to do a lot of off-label design, using parts properties past their specs, or where there are no specs. I'm trying to decide whether I'm going to use some phemts at 2x their rated voltage, or at

Screw the aftermath. It's the run-up I can't wait for. Those head-to-head debates will be *electric* and Donald is going to smash that lying, murdering bitch into the dirt with the twin weapons of truth and reason. That disgusting old crone must be soiling her diapers so badly right now in desperately trying to find some way out of having to face her opponent unscripted on live TV. :-D

And _no_ teleprompter... goin' to be fun to watch >:-} ...Jim Thompson

I plead guilty to (b), but try not to do (a). As you've pointed out, RF parts aren't well specified for DC and wideband applications.

Cheers

Phil Hobbs

Since Donald has different ideas about what is true from one statement to t he next, his grasp of the weapons of truth and reason is rather less than f irm.

You do have a fertile imagination, uninhibited by any connection to the rea l world. In reality, Hillary Clinton - a trained lawyer - will be delighted by the chance to use her forensic skills to dismantle a buffoon who doesn' t know what he's talking about (though he does know enough to make his spie l sound good to the unsophisticated, of which you are a prime example).

Not really. Donald Trump isn't good enough at debating to look like anything other than the clown he is. Hillary won't have any trouble nailing him, but he won't realise that he's been nailed, so he'll just keep on blustering.

Hillary looking complacent isn't going to make for great television.

Whether or not Trump is nailed is only of secondary importance. What matters is whether or not the voters realise he has been nailed.

Too many punters listen to the tone and not the content, and follow strongly mouthed absolute statements in preference to nuanced cautious statements.

Better check you have enough beer and popcorn in, Jim. This is going to be totally EPIC! :-D

She'll be on the ropes the whole time, you wait. Trump's going to expose her criminality for all to see. Forensically dismantling a buffoon? Dream on. She'll probably end up with no alternative but to plead the 5th! Her team must know this even if she doesn't so it wouldn't surprise me at all to see her find some excuse to back out at the last minute - if not before. But I *really* want to see this go ahead as planned.

I'm sure I have enough popcorn... I regularly stock Orville Redenbacher microwave bags.

But I prefer wine... just discovered a nice Cabernet, aptly named "Carnivor" >:-} ...Jim Thompson

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DEMOCRAT

The Party of Sexual Deviants, COP Haters, College Students with Phenomenal Ignorance, and Unions Covering for Bad Teachers

I expect a serious stammer episode at the first debate and then backing out of all the rest. ...Jim Thompson

If the debates go ahead - *if* - that bitch is toast. She desperately wants to make history as the first woman to be POTUS and the first Jewish person to do likewise. However, after these debates the only future she'll have to look forward to will be behind bars. LOL!

Cursitor Doom is going to be so disappointed.