Widlar super follower

In that case I think you should recalibrate your definition of what an expression of bewilderment is. In much the same way as you should recalibrate your opinion of what computers can do. I've never seen you go so quiet so quick when Professor Hebisch told you that.

Oh well. Never mind...

Well, you're not going to get 2300 at 20ma and 0.7Volts Vce, that's for sure!

Rohm do make some nice parts. The old intersil IT124 dual NPN is second sourced by Linear Systems. That has a beta of about 2750 at a Vce of about 1.7V in the 10's of uA collector current range (breadown is 2V). Still a useful part. They also do the superbeta LS303.

Mind you, they're probably of no use for this application where your goal is presumably minimal input voltage noise.

I don't think that I'll bother. Some people that post here do know what they are talking about pretty much all the time, but you aren't one of them.

And in which thread was that? What computers can do does depend on the programs they are running, and there are a great many programs out there

- some of which one can download for free.

Bob Widlar was famous amongst people who did sold state electronics. It's not a large group. I met Barry Gilbert once. I rarely meet people who might realise that he was famous. I like to claim that my father was world famous amongst paper chemists - all 150 of them.

She was right to be concerned about his drinking - everybody else was. I don't know if it killed him, but when we sent our ultra-sound machine off to Glasgow around 1978, it diagnosed more enlarged right ventricles (a symptom of cirrhosis of the liver) than enlarge left ventricles (the usual sign of heart disease).

Yes 0.6V does work but that 0.6V is rather variable, but I guess zero is always the same, and it is the same for both devices in the pair?

It looks as if it would have been the "Re: Le Tout Nouveau Testament" thread, but Waldek Hebisch didn't directly react to any of my posts there, and does seem to roughly share my point of view.

I suppose I can blame your capacity to misread what you see, but it's still an odd claim.

Therefore it should be obvious that that's not the thread I meant.

You can blame anything you like but the facts are that you have a very short memory. Or more likely a selective memory. if (input = criticism) then delete() or attack();

File not found.

You are obsessed with me. You need a hobby.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Am 05.09.26 um 17:47 schrieb Edward Rawde:

I have started to divide this file to separate libs for BJTs, FETs, Opamps... The collection has simply grown too big. (It won't stay on dropbox forever.)

The simulation itself does not require exotic things.

"Gerhard Hoffmann" snipped-for-privacy@arcor.de wrote in message news:117hro5$lks$ snipped-for-privacy@solani.org...

Thank you. I was missing BAV99S and FZT851 They are included in the file below.

Version 4.1 SHEET 1 2052 1328 WIRE -368 -1136 -448 -1136 WIRE -288 -1104 -320 -1104 WIRE 16 -1104 -288 -1104 WIRE 224 -1104 16 -1104 WIRE -320 -1072 -320 -1104 WIRE -368 -1056 -368 -1136 WIRE -496 -1024 -512 -1024 WIRE -448 -1024 -448 -1056 WIRE -448 -1024 -496 -1024 WIRE -448 -1008 -448 -1024 WIRE 16 -992 16 -1104 WIRE -416 -928 -448 -928 WIRE -368 -928 -368 -1008 WIRE -368 -928 -416 -928 WIRE -320 -928 -320 -992 WIRE 224 -928 224 -1104 WIRE -416 -912 -416 -928 WIRE 16 -880 16 -912 WIRE 160 -880 16 -880 WIRE 16 -864 16 -880 WIRE 224 -752 224 -832 WIRE 224 -752 -160 -752 WIRE 336 -752 224 -752 WIRE 384 -752 336 -752 WIRE -160 -704 -160 -752 WIRE 16 -704 16 -800 WIRE -496 -656 -512 -656 WIRE -448 -656 -496 -656 WIRE -352 -656 -368 -656 WIRE -304 -656 -352 -656 WIRE -224 -656 -304 -656 WIRE 224 -656 224 -752 WIRE 224 -656 80 -656 WIRE -352 -640 -352 -656 WIRE 224 -624 224 -656 WIRE -96 -608 -160 -608 WIRE 16 -608 -96 -608 WIRE -512 -544 -512 -656 WIRE -96 -544 -96 -608 WIRE -240 -416 -336 -416 WIRE -96 -416 -96 -464 WIRE -96 -416 -240 -416 WIRE 224 -416 224 -544 WIRE 224 -416 -96 -416 FLAG -320 -848 0 FLAG -336 -336 0 FLAG -288 -1104 vcc FLAG -496 -656 vgen FLAG -416 -912 0 FLAG -496 -1024 v3p FLAG -512 -464 0 FLAG -304 -656 rein FLAG 336 -752 raus FLAG -240 -416 VEE FLAG -352 -560 0 SYMBOL voltage -320 -944 R0 WINDOW 0 -32 56 VBottom 2 WINDOW 3 32 56 VTop 2 WINDOW 123 0 0 Left 2 WINDOW 39 -52 151 VTop 2 SYMATTR InstName V1 SYMATTR Value +6 SYMBOL voltage -336 -432 R0 WINDOW 123 -101 112 Left 2 WINDOW 39 -130 80 Left 2 WINDOW 3 -112 50 Left 2 WINDOW 0 -117 20 Left 2 SYMATTR Value2 AC 0 SYMATTR SpiceLine Rser=0 SYMATTR Value -6 SYMATTR InstName V2 SYMBOL e -320 -1088 R0 WINDOW 0 35 76 Left 2 WINDOW 3 35 98 Left 2 SYMATTR InstName E1 SYMATTR Value 2 SYMBOL res -464 -1152 R0 WINDOW 3 -66 -25 Left 2 WINDOW 123 -66 -4 Left 2 SYMATTR Value 60.347 SYMATTR Value2 temp=27 SYMATTR InstName R10 SYMBOL voltage -448 -1024 R0 WINDOW 0 -32 56 VBottom 2 WINDOW 3 32 56 VTop 2 WINDOW 123 0 0 Left 2 WINDOW 39 -57 138 VTop 2 SYMATTR InstName V3 SYMATTR Value 0.1µ SYMATTR SpiceLine Rser=0.1 SYMBOL voltage -512 -560 R0 WINDOW 123 41 64 Left 2 WINDOW 39 39 39 Left 2 WINDOW 3 41 92 Left 2 WINDOW 0 36 11 Left 2 SYMATTR Value2 AC 1 SYMATTR SpiceLine Rser=0 SYMATTR Value SINE(0 1 1000 0 0 0 20) SYMATTR InstName V5 SYMBOL npn 160 -928 R0 SYMATTR InstName Q3 SYMATTR Value fzt851 SYMBOL npn -224 -704 R0 WINDOW 0 -37 91 Left 2 WINDOW 3 -41 121 Left 2 WINDOW 39 -40 150 Left 2 SYMATTR InstName Q1 SYMATTR Value Q2sd2704k SYMATTR SpiceLine m=1 SYMBOL npn 80 -704 M0 WINDOW 0 38 115 Left 2 WINDOW 3 -51 142 Left 2 WINDOW 39 21 162 Left 2 SYMATTR InstName Q2 SYMATTR Value Q2sd2704k SYMATTR SpiceLine m=1 SYMBOL current 16 -992 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName I1 SYMATTR Value 20m SYMBOL current -96 -544 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName I2 SYMATTR Value 40m SYMBOL diode 0 -864 R0 SYMATTR InstName D1 SYMATTR Value bav99s SYMBOL res 208 -640 R0 SYMATTR InstName R1 SYMATTR Value 200 SYMBOL res -368 -656 R0 SYMATTR InstName R2 SYMATTR Value 10k SYMBOL res -352 -672 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 0.1 TEXT 256 -1072 Left 2 !;tran 10m TEXT 264 -1104 Left 2 ;.op TEXT 256 -1040 Left 2 !;noise v(raus) V5 dec 10 1 10e6 TEXT 264 -1016 Left 2 !.ac dec 1000 0.1 100Meg TEXT 256 -952 Left 2 !;.temp 20 40 60 TEXT 256 -984 Left 2 !;.include ghf_spice_lib.txt TEXT -200 -392 Left 2 ;Model name reminder: BAV99s\nm_bfp640 bc850c fzt851 bc817 bfr93a \nZXTN2018F BF=270 No KF no AF\nZXTN25020DFL BF=550 no KF no AF\n2SD2704K BF=2300!!! no KF no AF TEXT -1528 -952 Left 2 !.MODEL Q2SD2704K NPN IS=250.00E-15 BF=2.3219E3 VAF=100 IKF=25.778E-3\n+ ISE=270.34E-15 NE=1.8069 BR=45.088 VAR=100 IKR=9.4796 ISC=411.09E-15\n+ NC=2.0254 NK=.54182 RE=.4 RB=3.1823 RC=58.585E-3 CJE=8.7706E-12\n+ MJE=.66324 CJC=15.709E-12 MJC=.53302 TF=3.8352E-9 XTF=32.147\n+ VTF=472.13 ITF=85.294 TR=7.0574E-9 XTB=1.5000 AF = 2.0 KF=5.0E-9\n* AF and KF guessed by gerhard AF=2 == 1/f PSD TEXT -592 -784 Left 2 ;KF = flicker noise coefficient\nAF = flicker noise exp\nEF = fl. noise freq. exp SPECTRE? TEXT 256 -512 Left 2 ;Q1 und Q2 tragen gleich viel zum Rauschen bei.\n210 pV * 1.414 = 305 m=4 bringt nix. Aber mehr strom!\nzxtn25020 ist wesentlich besser als Q2sd2704k bei Rauschen\nbase bias 17uA sd2704 43uA zxtn25020dfl TEXT -1528 -728 Left 2 !.MODEL FZT851 NPN IS =1.0085E-12 NF =1.0001 BF =240 IKF=5.1 VAF=158\n+ ISE=2E-13 NE =1.38 NR =0.9988 BR =110 IKR=5.5 VAR=46 \n+ ISC=4.6515E-13 NC =1.334 RB =0.025 RE =0.018 RC =0.015 \n+ CJC=155E-12 MJC=0.4348 VJC=0.6477 CJE=1.05E-9 \n+ TF =0.79E-9 TR =24E-9 TEXT -1520 -1128 Left 2 !.MODEL BAV99S D(IS=7.4960E-9 N=2.0077 RS=.80464 IKF=.1058\n+ CJO=515.09E-15 M=.115 VJ=.6389 ISR=1.4182E-9 NR=4.9950\n+ BV=90.375 IBV=10 TT=2.1640E-9 Iave=0.2 Vpk=75 mfg=Philips type=silicon)

How convenient. Strange that you haven't taken the chance to specify which thread you did mean.

I have an unusually good memory. This is one of those "facts" that you have chosen to invent, perhaps like the thread where Waldek Hebisch allegedly admonished me.

Like pretty much everybody else I'm much better at remembering stuff that can be organised into a coherent whole. Your organising principle seems to be to distort what you remember to get it to fit into what you'd like to believe.

Like most egomaniacs, John Larkin wants the situation to revolve around him, and responds to every mention of his name.

More characteristics like this guy are coming out.

The idea is from the days when JFETs were unsuitable for a differential amplifier. Tektronix got much farther with its bootstrapping and JFET linearization techniques.

I don't like making statements like that. It's hard to provide objective support for that particular statement. It would be even harder for you to provide any objective evidence for your claim the I have a "very short memory" but detail like that doesn't seem to worry you.

Do keep on arguing by tossing in imagined "facts" - it just emphasises that you don't know what you are talking about.

Keep behaving like this guy if you must.

Nobody seems to know who "John+Gabriel"math might be. Asserting that my behaviour resembles his is a rather pointless insult in this context.

We know you are thick as brick. You don't have to labor the point.