AoE x-Chapters - 1x.2 Resistors

Thanks, I'll give those a try.

-- john

That's true, of course. What I mainly dislike about TM is that he gives the impression that a transistor works like a rheostat.

In your world, I expect they are. Not round here, by a lot.

Me too. Best R_on * C_off ratio in the biz!

Cheers

Phil Hobbs

My analog mosfet realtime Tj simulator/shutdown uses a dual PNP as a multiplier to compute power, Is*Vds. I need bipolars for that.

I might do another fast photodiode cascode, so I'll need a small fast NPN, if anybody still makes them next week. Digikey still shows BFT25 as active.

Aren't you just the bundle of joy today. ;)

Cheers

Phil Hobbs

I have legitimate grievances. I am discovering that JTAG is even less standardized than USB.

On a sunny day (Wed, 07 Aug 2019 15:27:41 -0700) it happened John Larkin wrote in :

All LNBs[1] I know use extremely fast extremely low noise NPNs.

Mostly low voltage NPNs, for example google Infineon-BFP520-DS-v02_00-EN.pdf

There are many and will likely still be there once California is part of China. (as it always was^H^H^H^H^H^H^H^H^H^H^H^H^H^H) I have a bunch of similar ones that I cannot remember the type number from.. Cheap too.

Good book, The Ghosts of Gold Mountain, about the Chinese who built the Central Pacific Railroad through the Sierras. Lots of cool stuff about Colfax, Dutch Flat, Truckee, and the China Wall.

Take a hike through Tunnel 6 if you are ever passing through.

On a sunny day (Thu, 08 Aug 2019 07:02:11 -0700) it happened John Larkin wrote in :

Nice plate.

OK, Maybe this is of use to you regarding those low noise RF transistors, nice layouts

E Clampus Vitus is either the California Historical Drinking Society or the California Drinking Historical Society. They can't make up their mind. Google it.

Here's the China Wall:

I like this one:

It looks kind of like a cathedral.

Interesting, thanks. I don't much do sine waves, but the parts and concepts can apply to time domain.

I guess people will need RF NPNs for a while. Not so much PNPs.

torsdag den 8. august 2019 kl. 03.23.25 UTC+2 skrev John Larkin:

JTAG is just as much a standard as spi

Which isn't saying much.

fredag den 9. august 2019 kl. 03.59.46 UTC+2 skrev snipped-for-privacy@notreal.com:

exactly, but USB is very much a standard

How many different connectors are there? At least 7.

That's the nice thing about standards. There're _so_ many to choose from.

The same could be said for JFETs. Yes, we're still using them, but actually, not by a lot, not very many. A few here and there, but not enough to keep the interest of many fab houses, who are steadily discontinuing one type after another.

Same problem for many small low-current MOSFET types, which I like for their low capacitance. And of course, we have all the 500MHz to 10GHz RF transistors that have disappeared as their functionality is now incorporated into ICs.

For usb I count 20

sockets

full size A,B, superspeed A, superspeed B Mini A, B, A/B Micro A, B, A/B C

plugs

full size A,B, superspeed A, superspeed B Mini A, B Micro A, B C

socket type A/B accepts both A and B plugs and is used for OTG

There's also an ESATA socket that also accepts USB-A plugs and also USB signals on Expresscard sockets. and two types of pin headers that connect via cable to "A" sockets on the chassis (regular and superspeed)

What's with the Abs Max ratings V(CEO) and V(CES) on that datasheet? Is the Abs Max collector-emmitter voltage 2.4V or 10V?

Does that "O" mean Operating and the "S" mean Smoke?

Clifford Heath.

O means base is open and S means base is shorted to E.

Am 02.09.19 um 23:51 schrieb Gerhard Hoffmann:

Ingrid would like to add:

If you give the carriers in the base an opportunity to silently go away, they won't engage in an avalanche revolution. In a cascode stage, for example, you can get healthy output voltages from that transistor.

regards, Gerhard