NPN Transistor Question

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Jim Thompson 11 years ago

Being in the I/C biz, I don't keep up very well with what is available in the discrete transistor world.

What I'm looking for is a _readily_available_ NPN, highest fT, VCE < 15V, IC < 10mA

Suggestions?

Thanks! ...Jim Thompson

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| 1962 | I love to cook with wine. Sometimes I even put it in the food.

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Phil Hobbs 11 years ago

BFP840--80 GHz, 5000 in stock at Digikey, about 30 cents.

Cheers

Phil Hobbs

Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net

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DecadentLinuxUserNumeroUno 11 years ago

On Fri, 05 Jun 2015 12:53:53 -0700, Jim Thompson Gave us:

Tough numbers to hit on...

close!

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DecadentLinuxUserNumeroUno 11 years ago

On Fri, 05 Jun 2015 16:53:50 -0400, DecadentLinuxUserNumeroUno Gave us:

A little closer...

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Jim Thompson 11 years ago

Thanks, Phil! ...Jim Thompson

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Phil Hobbs 11 years ago

BFP640FESD has BVces > 13V. Only 65 GHz.

Cheers

Phil Hobbs

Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net

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John Larkin 11 years ago

That practically oscillates just laying on the table!

John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com

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Winfield Hill 11 years ago

13V?? 4V 46GHz ??

Thanks, - Win

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jurb6006 11 years ago

THIRTY CENTS !

You work for the government or something ?

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Phil Hobbs 11 years ago

No, I just read off the Digikey 100 piece price. I sort of doubt that Jim is going to buy many more than that. ;)

Cheers

Phil Hobbs

Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net

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Jim Thompson 11 years ago

I'm not going to buy any... my client will do the purchasing. ...Jim Thompson

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| 1962 | I love to cook with wine. Sometimes I even put it in the food.

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Robert Baer 11 years ago

What about the age-old standby, the 2N2222?

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DecadentLinuxUserNumeroUno 11 years ago

On Sun, 07 Jun 2015 23:15:18 -0700, Robert Baer Gave us:

You missed the same thing I did. Highest fT.

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Spehro Pefhany 11 years ago

Why not suggest the OC71?

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ft 300kHz.

Best regards, Spehro Pefhany Amazon link for AoE 3rd Edition: http://tinyurl.com/ntrpwu8 Microchip link for 2015 Masters in Phoenix: http://tinyurl.com/l7g2k48

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Jim Thompson 11 years ago

;-) CK722 anyone ?>:-} ...Jim Thompson

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DecadentLinuxUserNumeroUno 11 years ago

On Mon, 08 Jun 2015 07:49:20 -0700, Jim Thompson Gave us:

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or this one...

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John Larkin 11 years ago

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Used to cost a week's allowance.

John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com

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jfeng 11 years ago

Really? Yout get $75/week in those days? Tha was a lot of money!

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Winfield Hill 11 years ago

Here's the 1952 datasheet, Raytheon, in Newton, MA, my old stomping ground.

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Thanks, - Win

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Phil Hobbs 11 years ago

My followup doesn't seem to have made it.

You're right about the 46 GHz--I was confusing it with another part, thanks.

The 13V I was quoting is BV_CES, which is pretty good for a part that fast. It shouldn't be too hard to arrange the circuit so that the base drive is really low-Z at DC.

Cheers

Phil Hobbs

Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net

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