Finally Figured It Out

--
Just another sidestep.

Only if you lead. JF likes his men to be men.

What? we're dancing together now?

Jamie

Why? The last time you came across a street address (no longer valid), you gloated that you then knew where to send the hit men.

Giving real information to an individual with a poor grasp of reality (who once claimed to have reported me to the FBI for exhibiting extreme anti-American attitudes) would be rather less than prudent.

The slob could probably make it up to my current front door - there's a lift - but consideration for my neighbours precludes being specific about the location.

-- Bill Sloman, Nijmegen

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krw thinks that what why he was rejected?

-- Bill Sloman, Nijmegen

On Mar 19, 3:19=A0pm, John Larkin wrote:

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Wrong, as it turns out.

Version 4 SHEET 1 1992 1652 WIRE 192 -208 -1936 -208 WIRE 768 -48 736 -48 WIRE 960 -48 768 -48 WIRE 1184 -48 1040 -48 WIRE 1264 -48 1184 -48 WIRE -544 -32 -1584 -32 WIRE 192 -32 192 -208 WIRE -544 -16 -1424 -16 WIRE -320 -16 -480 -16 WIRE -192 -16 -320 -16 WIRE 144 -16 -112 -16 WIRE -544 0 -1280 0 WIRE -544 16 -1136 16 WIRE -544 32 -560 32 WIRE -640 48 -992 48 WIRE 736 48 736 -48 WIRE 784 48 736 48 WIRE 1008 48 864 48 WIRE 1152 48 1008 48 WIRE 1264 48 1264 -48 WIRE 1264 48 1232 48 WIRE -640 64 -848 64 WIRE -560 64 -560 32 WIRE -560 64 -576 64 WIRE -640 80 -704 80 WIRE -704 96 -704 80 WIRE -640 96 -704 96 WIRE -704 112 -704 96 WIRE -640 112 -704 112 WIRE 192 208 192 64 WIRE 240 208 192 208 WIRE 320 208 240 208 WIRE 464 208 384 208 WIRE 656 208 544 208 WIRE 736 208 656 208 WIRE -1584 224 -1584 -32 WIRE -1424 224 -1424 -16 WIRE -1280 224 -1280 0 WIRE -1136 224 -1136 16 WIRE -992 224 -992 48 WIRE -848 224 -848 64 WIRE -704 224 -704 112 WIRE 736 256 736 208 WIRE 192 336 192 208 WIRE -1936 368 -1936 -208 WIRE 736 384 736 320 WIRE 768 384 736 384 WIRE 800 384 768 384 WIRE 1008 384 1008 48 WIRE 1008 384 880 384 WIRE -400 400 -1664 400 WIRE -400 416 -1504 416 WIRE -208 416 -336 416 WIRE -96 416 -208 416 WIRE 144 416 -16 416 WIRE -400 432 -1360 432 WIRE -400 448 -1216 448 WIRE -400 464 -416 464 WIRE -496 512 -1072 512 WIRE 736 512 736 384 WIRE -496 528 -928 528 WIRE -416 528 -416 464 WIRE -416 528 -432 528 WIRE -496 544 -784 544 WIRE -784 560 -784 544 WIRE -496 560 -784 560 WIRE -784 576 -784 560 WIRE -496 576 -784 576 WIRE -1664 656 -1664 400 WIRE -1504 656 -1504 416 WIRE -1360 656 -1360 432 WIRE -1216 656 -1216 448 WIRE -1072 656 -1072 512 WIRE -928 656 -928 528 WIRE -784 656 -784 576 WIRE -1936 816 -1936 448 WIRE -1664 816 -1664 736 WIRE -1664 816 -1936 816 WIRE -1584 816 -1584 304 WIRE -1584 816 -1664 816 WIRE -1504 816 -1504 736 WIRE -1504 816 -1584 816 WIRE -1424 816 -1424 304 WIRE -1424 816 -1504 816 WIRE -1360 816 -1360 736 WIRE -1360 816 -1424 816 WIRE -1280 816 -1280 304 WIRE -1280 816 -1360 816 WIRE -1216 816 -1216 736 WIRE -1216 816 -1280 816 WIRE -1136 816 -1136 304 WIRE -1136 816 -1216 816 WIRE -1072 816 -1072 736 WIRE -1072 816 -1136 816 WIRE -992 816 -992 304 WIRE -992 816 -1072 816 WIRE -928 816 -928 736 WIRE -928 816 -992 816 WIRE -848 816 -848 304 WIRE -848 816 -928 816 WIRE -784 816 -784 736 WIRE -784 816 -848 816 WIRE -704 816 -704 304 WIRE -704 816 -784 816 WIRE 192 816 192 432 WIRE 192 816 -704 816 WIRE 736 816 736 576 WIRE 736 816 192 816 WIRE 1008 816 1008 384 WIRE 1008 816 736 816 WIRE -1936 864 -1936 816 FLAG -1936 864 0 FLAG 768 -48 out- FLAG 1184 -48 out+ FLAG 768 384 tank+ FLAG 240 208 Drive FLAG -208 416 N-FET_drive FLAG -320 -16 P-FET_drive FLAG 656 208 offset_tank SYMBOL ind2 784 400 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 4 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 454.93=B5 SYMATTR Type ind SYMATTR SpiceLine Rser=3D0.022 SYMBOL cap 752 576 R180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C1 SYMATTR Value 220n SYMBOL voltage -1936 352 R0 WINDOW 123 0 0 Left 2 WINDOW 39 24 132 Left 2 SYMATTR SpiceLine Rser=3D0.001 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL ind2 768 64 R270 WINDOW 0 44 45 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L4 SYMATTR Value 15.75=B5 SYMATTR Type ind SYMATTR SpiceLine Rser=3D0.004 Cpar=3D100pF SYMBOL ind2 1136 64 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L5 SYMATTR Value 15.75=B5 SYMATTR Type ind SYMATTR SpiceLine Rser=3D0.004 SYMBOL res 1056 -64 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 100R SYMBOL FerriteBead 352 208 R270 WINDOW 0 16 0 VTop 2 SYMATTR InstName L6 SYMATTR Value 1.545=B5 SYMATTR SpiceLine Ipk=3D0.2 Rser=3D1 Rpar=3D785 Cpar=3D535f mfg=3D"Wurth Elektronik eiSos" pn=3D"742 792 79" SYMBOL nmos 144 336 R0 SYMATTR InstName M3 SYMATTR Value FDS6680A SYMBOL pmos 144 64 M180 SYMATTR InstName M4 SYMATTR Value FDS4435A SYMBOL voltage -1360 640 R0 WINDOW 3 -417 288 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0 5 6.1403125u 10n 10n 2.48536458u 63.1575u 4000) SYMATTR InstName V4 SYMBOL voltage -1216 640 R0 WINDOW 3 -529 341 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0 5 10.52625u 10n 10n 20.9063u 63.1575u 4000) SYMATTR InstName V5 SYMBOL res -96 -32 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 22 SYMBOL res 0 400 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 18 SYMBOL Digital\\or -368 368 R0 WINDOW 3 0 0 Invisible 2 SYMATTR Value Vhigh=3D5 Trise=3D10n SYMATTR InstName A1 SYMBOL Digital\\and -512 -64 R0 WINDOW 3 16 52 Invisible 2 SYMATTR Value Vhigh=3D5 Trise=3D10n Td=3D10n SYMATTR InstName A2 SYMBOL voltage -1664 640 R0 WINDOW 3 -185 218 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0 5 0u 10n 10n 0.739889583u 63.1575u 4000) SYMATTR InstName V2 SYMBOL voltage -1504 640 R0 WINDOW 3 -310 256 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0 5 2.6315625u 10n 10n 1.608178u 63.1575u 4000) SYMATTR InstName V3 SYMBOL voltage -1072 640 R0 WINDOW 3 -624 393 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0 5 32.4559375u 10n 10n 1.608178u 63.1575u 4000) SYMATTR InstName V6 SYMBOL voltage -928 640 R0 WINDOW 3 -746 426 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0 5 35.964875u 10n 10n 1.608175u 63.1575u 4000) SYMATTR InstName V7 SYMBOL ind2 448 224 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 4 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 33m SYMATTR Type ind SYMATTR SpiceLine Rser=3D1 Cpar=3D8.5p SYMBOL voltage -784 640 R0 WINDOW 3 -863 458 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0 5 40.34063u 10n 10n 1.608176u 63.1575u 4000) SYMATTR InstName V8 SYMBOL voltage -1280 208 R0 WINDOW 3 -383 -526 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(5 0 8.771875u 10n 10n 1.608175u 63.1575u 4000) SYMATTR InstName V9 SYMBOL voltage -1136 208 R0 WINDOW 3 -503 -555 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(5 0 31.57875u 10n 10n 0.739889583u 63.1575u

4000) SYMATTR InstName V10 SYMBOL voltage -1584 208 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 WINDOW 3 -144 -451 Left 2 SYMATTR Value PULSE(5 0 0.877180556u 10n 10n 1.608178u 63.15750u 4000) SYMATTR InstName V11 SYMBOL voltage -1424 208 R0 WINDOW 3 -281 -492 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(5 0 4.3859375u 10n 10n 1.608178u 63.15750u 4000) SYMATTR InstName V12 SYMBOL voltage -992 208 R0 WINDOW 3 -615 -583 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(5 0 34.2103125u 10n 10n 1.608178u 63.15750u 4000) SYMATTR InstName V13 SYMBOL voltage -848 208 R0 WINDOW 3 -734 -618 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(5 0 37.7190625u 10n 10n 2.48536458u 63.15750u 4000) SYMATTR InstName V14 SYMBOL voltage -704 208 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V15 SYMATTR Value PULSE(5 0 42.105u 10n 10n 20.9063u 63.15750u 4000) SYMBOL Digital\\or -464 480 R0 WINDOW 3 0 0 Invisible 2 SYMATTR Value Vhigh=3D5 Trise=3D10n Td=3D10n SYMATTR InstName A3 SYMBOL Digital\\and -608 16 R0 WINDOW 3 16 52 Invisible 2 SYMATTR Value Vhigh=3D5 Trise=3D10n Td=3D10n SYMATTR InstName A4 SYMBOL cap 720 256 R0 SYMATTR InstName C2 SYMATTR Value 3.3n TEXT -560 992 Left 2 !.tran 0 100m 0 10n TEXT 736 -248 Left 2 !K1 L1 L4 L5 0.99 TEXT -568 928 Left 2 !.ic V(tank+)=3D0 V(offset_tank)=3D2.5 I(L2)=3D-0.006 I(L6)=3D-0.006 TEXT 672 600 Left 2 ;+/-2% TEXT 816 272 Left 2 ;27T TEXT 816 104 Left 2 ;5T TEXT 1176 104 Left 2 ;5T

Works quite a lot better, with the second to fifth harmonics all around 80dB below the fundamental, which is not bad for a circuit that is probably about 90% efficient in converting DC current into sine wave current.

I benefited from some e-mail comments from an old friend of mine who is probably as good at electronics as anybody here. The circuit still has a long way to go.

In real life, the (altered) pulse sequence would come out of a PLD clocked at around 7MHz by a 74HCT4046 locked to the actual resonant frequency of the tank circuit - locked exactly how, I've yet to work out, though it might involve a rudimentary current sensing transformer (a couple of turns of wire on a ferrite tube) on the feed to the tank circuit.

-- Bill Sloman, Nijmegen

Schoen"

By "right" I meant that I was agreeing about "total waste of time."

Sorry for any misunderstanding.

There seems to be a new hobby, playing with LT SPice, engaged in by people who never actually build anything. It's like the people who watch celebrity cooking shows all day, but don't actually cook anything themselves.

Oh well, have fun.

--

John Larkin, President       Highland Technology Inc
www.highlandtechnology.com   jlarkin at highlandtechnology dot com   

Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom timing and laser controllers
Photonics and fiberoptic TTL data links
VME  analog, thermocouple, LVDT, synchro, tachometer
Multichannel arbitrary waveform generators

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Incorrectly, as it turns out. You'd be a poor choice for leading a development team.

Somehow I doubt that this a particularly sincere apology.

The parts list for the circuit I plan to build - something rather different - is now up to 26 items and about 500 euros, with a couple of expensive items still to come. It's on the back burner until I've indexed two of my wife's book chapters - she ran out of money-hungry graduate students before she ran out of chapters, so now I'm roped in

- but that's only going to take a couple of days.

LTSpice is certainly cheaper than building things, and you can pull out waveforms that would be hard to see in real life. I'm well aware that the models aren't perfect - I've bitched about specific short- comings here from time to time - but it can be handy.

This time I think I've got a circuit worth building, but I may be able to procrastinate until someone else builds it first.

-- Bill Sloman, Nijmegen