Can base amperage on an NPN be negative, and still work?

Sep 03, 2006 84 Replies

It's not as common as "current" but nobody around here would think twice about another engineer saying "amperage" or "wattage", especially so in an AC power situation. The terms are also commonly used to expressing ratings, as opposed to measurements, as in "what's the amperage of that fuse?"

We also say that "current flows" which gets some people here upset.

And we say pulses per second, cycles per second, rep-rate, and all sorts of other non-Hertzian things. And mhos instead of Siemens sometimes.

This just isn't important; since we are engineers, we don't have to pretend to be engineers. The only thing that's incorrect in engineering is gadgets that don't work.

John

John Woodgate a écrit :

I tend to prefer 'hommage', which almost always leads to less resistance.

Thanks, Fred.

In message , dated Sun, 3 Sep 2006, PeteS writes

Annoying GS officers can never be a bad thing, except at a court-martial. (;-)

OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk 2006 is YMMVI- Your mileage may vary immensely. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

Perhaps (just perhaps) I'm being pedantic, but I prefer to separate the name of a unit (current in this case), from the name of it's measurement unit. I haven't seen Faradage (it's perfectly possible it's shown up though), or Henryage. On the same grounds I object to amperage.

As to older units of measure, I still have textbooks that have statements in Kc/s and mhos, as well as 'current flows from positive to negative' ;) I consider those older units of measure perfectly valid. A fairly recent one is nanoFarad - years ago we simply referenced everything in microFarad or micromicroFarad, as I am sure you recall :) Up to perhaps 5 years ago I had not heard the term 'nanofarad' - now it seems pretty common and logically it is a perfectly valid statement. At least it's still not Faradage.

Yes, you are completely correct; in the end it's making gadgets that work that matters - See, I just agreed with John :)

Cheers

PeteS

In message , dated Sun, 3 Sep 2006, John Larkin writes

I would.

UGH!!! CUBED. WITH SOMETHING NASTY PLASTERED ON IT.

It's this sort of thing that gets design engineers confused with the 'engineers' who repair washing machines. And if the 'engineer' can't fix it, they bring in a technician!

OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk 2006 is YMMVI- Your mileage may vary immensely. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

I think some fuelage gages work by ohmage. Some of them may be sensitive to degreeage, though.

Sno-o-o-o-ort!

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.

I like 'potential difference' where appropriate.

Graham

NJM4580 is the dual operational amplifier, specially designed for improving the tone control, which is most suitable for the audio application. Featuring noiseless, higher gain bandwidth, high output current and low distortion ratio, and it is most suitable not only for acoustic electronic parts of audio pre-amp and active filter, but also for the industrial measurement tools. It is also suitable for the head phone amp at higher output current, and further more, it can be applied for the handy type set operational amplifier of general purpose in application of low voltage single supply type which is properly biased of the low voltage source.

Noiseless was formerly noseless in an ealier revision btw

Graham

You mean Judas Iscariot? His name is mentioned 11 times in the King James Bible.

Matthew 10:4 Matthew 26:14 Mark 3:19 Mark 14:10 Luke 6:16 Luke 22:3 John 6:71 John 12:4 John 13:2 John 13:26 John 14:22

Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

Yep. Still no such word. There IS a word 'Sicariot' however.

Lets see: It is printed eleven times per copy in one of the most printed books in the history of mankind, yet it doesn't exist? I fail to see any proof on your part.

Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

Find any OTHER book which uses it.

In message , dated Mon, 4 Sep 2006, Michael A. Terrell writes

I think that Genome means that the word 'Iscariot' seems to have no provenance and it is far from clear how it came to be attached to the name of Judas bar Simon.

OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk 2006 is YMMVI- Your mileage may vary immensely. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

There's not a lot of difference. There is such a thing as a "professional engineer", which people who actually design electronics usually aren't.

John

Sorry if I wasn't clear the first time:

There's not a lot of difference.

John

In message , dated Mon, 4 Sep 2006, John Larkin writes

Well, it isn't quite like that in UK, and I suspect it may not be elsewhere. Electronics design is done by people who are post-grads (non-pseud), graduates with the equivalent of US 'PE', graduates without, technicians and a class I call 'super-technicians', who are people who, not fitting into the usual academic stream, have skills at or approaching the post-grad level. I've met two, that I know of.

So, I'm talking about the confusion of those people with people who repair household appliances. It's a perpetual bitch among 'PE-equivalents' in Britain.

OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk 2006 is YMMVI- Your mileage may vary immensely. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

That seems to be an English thing. Elsewhere tradesmen are referred to by their trade.

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