Groups > sci.electronics.design > #725952

Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them.

Subject	Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them.
Newsgroups	sci.electronics.design
References	<6b1217f0-f55b-95b4-6516-6914d18d0e91@electrooptical.net>
From	Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Message-ID	<08ff28e9-5dd9-c0ab-cdb3-11486ab8d620@electrooptical.net> (permalink)
Date	2024-09-09 21:59 -0400

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On 2024-09-04 17:54, Phil Hobbs wrote:
> The NTE2403, similar to the BFT92, but a bit better overall.  Dunno who 
> actually made them. (I saw the news on s.e.repair today.)
> 
> Rochester claims to have 1,500,000 of the 2SA1462 (1.8 GHz) for 20 
> cents, but that's all she wrote.
> 
> I have a couple of reels of BFT92s and one of BFG31s, so I'm good for 
> protos and small production, but I can't use PNP wraparound bootstraps 
> for customer designs anymore. :(
> 
> Barstids.
> 
> Cheers
> 
> Phil Hobbs
> 
Something like this. This is what I call a Type 2 bootstrap, in which 
the bootstrap device is inside the TIA feedback loop.  You have to worry 
about drift and 1/f noise in the FET, but that's usually the least of 
your worries.

Cheers

Phil Hobbs

===========
Version 4
SHEET 1 2276 1088
WIRE -496 112 -656 112
WIRE -464 112 -496 112
WIRE -224 112 -240 112
WIRE -112 112 -128 112
WIRE -224 128 -224 112
WIRE -128 128 -128 112
WIRE -496 144 -496 112
WIRE -656 192 -656 112
WIRE -224 224 -224 208
WIRE -128 224 -128 208
WIRE -496 240 -496 224
WIRE -496 240 -592 240
WIRE -496 256 -496 240
WIRE 160 288 112 288
WIRE 288 288 224 288
WIRE -656 320 -656 288
WIRE -288 320 -448 320
WIRE -192 320 -288 320
WIRE 112 320 112 288
WIRE 112 320 -192 320
WIRE -288 336 -288 320
WIRE -192 368 -192 320
WIRE 112 368 112 320
WIRE 160 368 112 368
WIRE 288 368 288 288
WIRE 288 368 240 368
WIRE 288 432 288 368
WIRE -656 480 -656 400
WIRE -496 480 -496 352
WIRE -496 480 -656 480
WIRE -368 480 -496 480
WIRE -288 480 -288 416
WIRE -288 480 -368 480
WIRE -192 480 -192 432
WIRE -192 480 -288 480
WIRE 64 480 -192 480
WIRE 160 480 144 480
WIRE 288 496 288 432
WIRE 288 496 224 496
WIRE 160 512 128 512
WIRE -368 528 -368 480
WIRE 128 560 128 512
WIRE -672 576 -704 576
WIRE -560 576 -592 576
WIRE -496 576 -560 576
WIRE -432 576 -496 576
WIRE -704 592 -704 576
WIRE -496 592 -496 576
WIRE -560 624 -560 576
WIRE -368 640 -368 624
WIRE -560 736 -560 688
WIRE -560 736 -576 736
WIRE -496 736 -496 672
WIRE -496 736 -560 736
WIRE -368 736 -368 720
WIRE -368 736 -496 736
FLAG -128 224 0
FLAG -224 224 0
FLAG -240 112 VCC
FLAG -112 112 VEE
FLAG -576 736 VEE
FLAG -464 112 VCC
FLAG 192 464 VCC
FLAG 192 528 VEE
FLAG 128 560 0
FLAG 288 432 out
FLAG -704 592 0
SYMBOL voltage -128 112 R0
WINDOW 0 41 50 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value -5
SYMBOL voltage -224 112 R0
WINDOW 0 -69 56 Left 2
SYMATTR InstName V2
SYMATTR Value +5
SYMBOL njf -448 256 M0
WINDOW 3 -112 -9 Left 2
SYMATTR Value BF862_1pA
SYMATTR InstName J1
SYMBOL res -512 128 R0
SYMATTR InstName R5
SYMATTR Value 100
SYMBOL pnp -592 288 R180
SYMATTR InstName Q2
SYMATTR Value BFT92
SYMBOL current -288 336 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -58 -60 Left 2
SYMATTR InstName I1
SYMATTR Value PULSE(1u 1n 10n 10n 10n 0.5u)
SYMBOL res 144 384 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 1Meg
SYMBOL cap 160 304 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C3
SYMATTR Value 0.09p
SYMBOL cap -208 368 R0
SYMATTR InstName C4
SYMATTR Value 100p
SYMBOL res 160 464 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1m
SYMBOL res -640 304 M0
SYMATTR InstName R3
SYMATTR Value 1m
SYMBOL npn -432 528 R0
SYMATTR InstName Q1
SYMATTR Value BFU520D
SYMBOL res -384 624 R0
SYMATTR InstName R2
SYMATTR Value 160
SYMBOL res -512 576 R0
SYMATTR InstName R7
SYMATTR Value 1k
SYMBOL res -576 560 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 1k
SYMBOL cap -576 624 R0
SYMATTR InstName C1
SYMATTR Value 1u
SYMBOL OpAmps\\UniversalOpAmp2 192 496 R0
WINDOW 123 -32 90 Left 2
WINDOW 39 -32 141 Left 2
WINDOW 40 -35 115 Left 2
SYMATTR InstName U1
SYMATTR Value2 Avol=50k GBW=100Meg Slew=3G
SYMATTR SpiceLine Ilimit=50m Rail=0 Vos=0
SYMATTR SpiceLine2 En=12n Enk=0 In=0 Ink=0 Rin=500Meg
TEXT 408 512 Left 2 !.lib \\electronics\\SpiceModels\\PHParts.lib
TEXT -824 736 Left 2 !.tran 1.5u
TEXT -104 344 Left 2 ;Photodiode
TEXT 248 520 Left 2 ;Similar to \nLM6171
TEXT -152 680 Left 2 !.model BF862_1pA NJF(Beta=47.800E-3 Betatce=-.5 
Rd=.8 Rs=7.5000 Lambda=37.300E-3 Vto=-.57093\n+ Vtotc=-2.0000E-3 
Is=6e-15 Isr=6e-15 N=1 Nr=2 Xti=3 Alpha=-1.0000E-3\n+ Vk=59.97 
Cgd=7.4002E-12 M=.6015 Pb=.5 Fc=.5 Cgs=8.2890E-12 Kf=87.5E-18\n+ Af=1)
RECTANGLE Normal 48 496 -352 256 2


-- 
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

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Thread

Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-04 17:54 -0400
  Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. john larkin <jlarkin_highland_tech> - 2024-09-04 19:50 -0700
    Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-05 07:22 +0000
  Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Jan Panteltje <alien@comet.invalid> - 2024-09-05 06:15 +0000
    Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-05 07:30 +0000
      Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. john larkin <jlarkin_highland_tech> - 2024-09-05 07:14 -0700
        Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-05 10:49 -0400
          Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. john larkin <jl@650pot.com> - 2024-09-05 15:06 -0700
            Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-05 22:44 +0000
              Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. john larkin <jl@650pot.com> - 2024-09-05 15:55 -0700
                Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-06 00:07 +0000
                Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Jan Panteltje <alien@comet.invalid> - 2024-09-06 06:44 +0000
            Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. bitrex <user@example.net> - 2024-09-07 23:40 +0000
              Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-08 00:02 +0000
                Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-08 00:16 +0000
          Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Gerhard Hoffmann <dk4xp@arcor.de> - 2024-09-06 01:43 +0200
            Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. john larkin <jl@650pot.com> - 2024-09-05 16:58 -0700
            Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-06 00:13 +0000
  Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Bill Sloman <bill.sloman@ieee.org> - 2024-09-05 21:15 +1000
    Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. bitrex <user@example.net> - 2024-09-05 14:24 +0000
      Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-05 18:17 +0000
        Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Gerhard Hoffmann <dk4xp@arcor.de> - 2024-09-05 20:57 +0200
          Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-05 19:58 +0000
  Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Chris Jones <lugnut808@spam.yahoo.com> - 2024-09-06 22:47 +1000
    Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Gerhard Hoffmann <dk4xp@arcor.de> - 2024-09-06 17:31 +0200
    Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-06 13:33 -0400
  Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Joerg <news@analogconsultants.com> - 2024-09-06 15:59 -0700
    Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-07 21:46 +0000
      Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Joerg <news@analogconsultants.com> - 2024-09-09 14:02 -0700
  Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-09 21:59 -0400
    Re: Drat. NTE is gone, and they took the last 5-GHz PNP with them. Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2024-09-09 22:12 -0400

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