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another goofy boost converter architecture

It was not "advertised" as doing anything but what it does.

It's cheap, cute, and efficient. It uses a small number of standard parts. Its startup and topoff behavior are excellent. Your technical criticisms are simply wrong; neither the peak drain voltage nor the peak drain current are problems, much less "infinite." You just don't like it.

Reply to
John Larkin
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There is bazillion of IC + FET solutions for this purpose. Or, perhaps, just single IC. Your pile of discretes is worse in any respect.

I do not like conceptually wrong designs.

VLV

Reply to
Vladimir Vassilevsky

You totally missed (or evaded) the point. Is anyone surprised? ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142   Skype: Contacts Only  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.
Reply to
Jim Thompson

Hey!!!! It's CUTE! Did you miss that ?>:-} ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142   Skype: Contacts Only  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.
Reply to
Jim Thompson

In the short term, this doesn't mean much.

This is a 3W converter? place the 9V node symbol on the other side of R8 to include control power in your loss equation.

Then, note the free gate drive energy - about 50mW resistive loss, half of it in R3, the other half in IC 'A'......and that's not counting IC A's internal switching losses (it's a schmitt???).

Your coupling and filter capacitors are ESR-free. While there are some pretty low-esr parts out there, the issue is never going away.

With small converters, measurement error, even in a simulation, is significant. Luckily, efficiency usually isn't.

RL

Reply to
legg

The losses in the ESR of the capacitor you're charging are not included in the efficiency equation, either. If a 1mR sensor makes that much difference under peak/average loading, imagine what 8mR esr will do?

Capacitive dumping, without energy storage is a 50/50 proposition.

RL

Reply to
legg

Well, John, make sure your "period of interest" includes energy returned as well as energy supplied.

John S

Reply to
John S

You never say anything concrete. And nobody is surprised.

Post a equation that you think reports efficiency.

Reply to
John Larkin

What does that mean?

Reply to
John Larkin

The esr of the electrolytics will be about 10 mR in real life, but we'll parallel some ceramics too. That will be insignificant.

If a 1mR sensor makes

I can't see that the 1 mR resistors make any significant difference. Neither ever drops as much as a millivolt.

What?

Reply to
John Larkin

Ah, that's the issue: you don't like it.

Most of the integrated boost controllers need a lot of discretes, which take room. And they often do stuff that I don't want, like burst mode, foldback, complex and poorly defined stuff.

Besides, I'm a circuit designer. It's not much fun to just copy reference designs.

I simulated one LTC circuit that did weird things so I asked for support. Useless. And there's no way to figure it out from the data sheet and an encrypted bahavioral model.

Your critiques are purely emotional. It works. Neither of the flaws you cited are problems. Find something actually wrong with it.

Reply to
John Larkin

Note that you, as usual, have said nothing of substance, nothing about the topic. All you do is whine.

Magnetics confuses you. We've seen that before.

Reply to
John Larkin

What is the load and the "period of interest"? (Your turn now).

Reply to
John S

Good point, but it would make a small difference. Each of the LT1011s draws about 3 mA. Well, after their 110 amp turnon spike.

It's a schmitt with magical internal 5-volt power supply. Batteries?

I'm showing about 95% efficiency, so there's not much more I can do. The added drive and control stuff can't be helped.

Reply to
John Larkin

I think I should back out of this thread. I do not understand your definition of efficiency because you have no load on your simulation. I always thought that efficiency was Pout/Pin. Since Pout is close to zero (steady state) your efficiency cannot be very good.

Good luck.

Reply to
John S

Maybe R7 (1 m Ohm) can be removed to reduce a node since the FET already has 25 m Ohms ?

You could also maybe place the 1 m Ohm ESR of L3, L5 (and L4 -- R1, C7 -- R9 if you want to) inside the part itself to reduce nodes and possibly help it to run a bit faster but maybe you want them there so you can think about the circuit better.

boB

Reply to
boB

All energy transfer in this circuit is capacitor to capacitor, or voltage to voltage. The only intermediate energy storage is leakage inductance, and that's never there where it's needed.

Every time you do that, you throw half the energy away.

You can change the model yourself and see this. Just remember that for capacitor charging storage, the 'output' voltage has I x esr subtracted from it, at all times.

The same considerations are needed for the source, where efficiency calculations are concerned.

RL

Reply to
legg

On Thu, 04 Jul 2013 18:39:21 -0700, John Larkin wrote:

Reducing the current sensor values to be less than 1/10th the dominant impedances is the usual way of compensating for their effect in the circuit.

Here's a skeptic afflicted with esr. Losses in both the source and the load are considered in the total efficiency, just to agravate things. It's not necessary - ignoring input and output esr, but measuring the real peak currents flowing in the sensors, easily sends efficiency below 50%;

Version 4 SHEET 1 1920 1092 WIRE 464 96 336 96 WIRE -48 144 -96 144 WIRE -16 144 -48 144 WIRE 128 144 96 144 WIRE 240 144 208 144 WIRE 320 144 240 144 WIRE 464 144 464 96 WIRE 464 144 400 144 WIRE 528 144 464 144 WIRE 656 144 608 144 WIRE 912 144 864 144 WIRE 1056 144 992 144 WIRE 1152 144 1056 144 WIRE 1264 144 1216 144 WIRE 1312 144 1264 144 WIRE 1440 144 1392 144 WIRE -96 176 -96 144 WIRE 96 176 96 144 WIRE 1440 224 1440 144 WIRE 240 240 240 144 WIRE 320 240 240 240 WIRE 464 240 464 144 WIRE 464 240 384 240 WIRE 1264 240 1264 144 WIRE 1312 240 1264 240 WIRE 1440 240 1440 224 WIRE 1440 240 1376 240 WIRE 608 304 576 304 WIRE 656 304 656 144 WIRE 656 304 608 304 WIRE 736 304 656 304 WIRE 864 304 864 144 WIRE 864 304 800 304 WIRE -96 320 -96 256 WIRE 96 320 96 256 WIRE 656 336 656 304 WIRE 1056 336 1056 144 WIRE 1440 336 1440 304 WIRE 1472 336 1440 336 WIRE 864 352 864 304 WIRE 1440 352 1440 336 WIRE 304 384 272 384 WIRE 400 384 368 384 WIRE 656 432 656 416 WIRE -48 448 -96 448 WIRE -16 448 -48 448 WIRE 144 448 96 448 WIRE 272 448 272 384 WIRE 272 448 224 448 WIRE 304 448 272 448 WIRE 400 448 400 384 WIRE 400 448 368 448 WIRE 864 448 864 416 WIRE 1440 464 1440 416 WIRE -96 480 -96 448 WIRE 1056 480 1056 416 WIRE 272 512 272 448 WIRE 304 512 272 512 WIRE 400 512 400 448 WIRE 400 512 368 512 WIRE 432 512 400 512 WIRE 560 512 512 512 WIRE 608 512 560 512 WIRE 96 576 96 448 WIRE 160 576 96 576 WIRE 272 576 272 512 WIRE 272 576 224 576 WIRE 304 576 272 576 WIRE 400 576 400 512 WIRE 400 576 368 576 WIRE 1056 592 1056 544 WIRE -96 624 -96 560 WIRE 400 624 368 624 WIRE 544 624 512 624 WIRE 656 624 656 528 WIRE 656 624 624 624 WIRE 368 656 368 624 WIRE 1120 672 1056 672 WIRE 1264 672 1200 672 WIRE 1312 672 1264 672 WIRE 1328 672 1312 672 WIRE 512 688 512 624 WIRE 512 688 400 688 WIRE 656 688 656 624 WIRE 96 704 96 576 WIRE 144 704 96 704 WIRE 320 704 144 704 WIRE 448 720 400 720 WIRE 464 720 448 720 WIRE 512 720 512 688 WIRE 1056 720 1056 672 WIRE 1264 736 1264 672 WIRE 368 768 368 752 WIRE 384 768 384 752 WIRE 384 768 368 768 WIRE 368 784 368 768 WIRE 512 816 512 784 WIRE 656 816 656 768 WIRE 400 832 368 832 WIRE 368 864 368 832 WIRE 1056 880 1056 800 WIRE 1264 880 1264 800 WIRE 656 896 400 896 WIRE 736 896 656 896 WIRE 864 896 816 896 WIRE 896 896 864 896 WIRE 96 912 96 704 WIRE 320 912 96 912 WIRE 96 928 96 912 WIRE 448 928 400 928 WIRE 480 928 448 928 WIRE 656 928 656 896 WIRE 368 976 368 960 WIRE 384 976 384 960 WIRE 384 976 368 976 WIRE 368 992 368 976 WIRE 96 1040 96 992 WIRE 656 1040 656 1008 FLAG 1472 336 VP FLAG 656 816 0 FLAG 96 320 0 FLAG 608 304 DRAIN FLAG 560 512 GATE FLAG 864 448 0 FLAG 1056 592 0 FLAG 1056 880 0 FLAG 1312 672 EFF FLAG 1264 880 0 FLAG 96 1040 0 FLAG 144 704 rc FLAG 1440 464 0 FLAG 336 96 9V FLAG 368 784 0 FLAG 400 624 9V FLAG 448 720 0.2V FLAG -96 320 0 FLAG -48 144 0.2V FLAG 368 992 0 FLAG 400 832 9V FLAG -96 624 0 FLAG -48 448 1.25V FLAG 448 928 1.25V FLAG 656 1040 0 FLAG 864 896 VP FLAG 512 816 0 SYMBOL ind2 512 160 R270 WINDOW 0 -41 56 VTop 2 WINDOW 3 -53 53 VBottom 2 SYMATTR InstName L1 SYMATTR Value 5µ SYMATTR Type ind SYMATTR SpiceLine Rser=0.06 SYMBOL schottky 1152 160 R270 WINDOW 0 -41 30 VTop 2 WINDOW 3 -49 27 VBottom 2 SYMATTR InstName D1 SYMATTR Value 10MQ060N SYMATTR Description Diode SYMATTR Type diode SYMBOL voltage 96 160 R0 WINDOW 0 60 48 Left 2 WINDOW 3 67 80 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 9 SYMBOL nmos 608 432 R0 WINDOW 0 -55 -55 Left 2 WINDOW 3 -101 -22 Left 2 SYMATTR InstName M1 SYMATTR Value Si7218DN SYMBOL ind2 896 160 R270 WINDOW 0 -32 56 VTop 2 WINDOW 3 -41 57 VBottom 2 SYMATTR InstName L2 SYMATTR Value 5µ SYMATTR Type ind SYMATTR SpiceLine Rser=0.06 SYMBOL res 528 496 R90 WINDOW 0 -15 56 VBottom 2 WINDOW 3 46 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 10 SYMBOL res 1296 160 R270 WINDOW 0 -38 31 VTop 2 WINDOW 3 -11 86 VBottom 2 SYMATTR InstName R6 SYMATTR Value .01m SYMBOL cap 1376 224 R90 WINDOW 0 68 59 VBottom 2 WINDOW 3 42 -8 VTop 2 SYMATTR InstName C3 SYMATTR Value 50p SYMBOL res 304 160 R270 WINDOW 0 -37 24 VTop 2 WINDOW 3 -11 88 VBottom 2 SYMATTR InstName R8 SYMATTR Value .01m SYMBOL cap 384 224 R90 WINDOW 0 71 54 VBottom 2 WINDOW 3 43 0 VTop 2 SYMATTR InstName C6 SYMATTR Value 50p SYMBOL res 1040 320 R0 WINDOW 0 59 38 Left 2 WINDOW 3 58 74 Left 2 SYMATTR InstName R9 SYMATTR Value 500 SYMBOL cap 1040 480 R0 WINDOW 0 -46 35 Left 2 WINDOW 3 -50 68 Left 2 SYMATTR InstName C7 SYMATTR Value 30p SYMBOL bv 1056 704 R0 WINDOW 3 -110 247 Left 2 WINDOW 0 -83 97 Left 2 SYMATTR Value V= LIMIT (0, 100 * I(R6) * V(VP) / ( I(R13) * 9 ),

120) SYMATTR InstName B1 SYMBOL res 1216 656 R90 WINDOW 0 70 60 VBottom 2 WINDOW 3 78 61 VTop 2 SYMATTR InstName R1 SYMATTR Value 1K SYMBOL cap 1248 736 R0 WINDOW 0 -37 63 Left 2 WINDOW 3 -43 94 Left 2 SYMATTR InstName C2 SYMATTR Value 10n SYMBOL Digital\\schmtinv 160 512 R0 SYMATTR InstName A1 SYMATTR Value2 Vhigh=5 Vt=2.5 Vh=0.5 SYMATTR SpiceLine Td=5n SYMBOL cap 80 928 R0 WINDOW 0 44 60 Left 2 WINDOW 3 37 92 Left 2 SYMATTR InstName C4 SYMATTR Value 500p SYMBOL res 128 464 R270 WINDOW 0 88 58 VTop 2 WINDOW 3 74 57 VBottom 2 SYMATTR InstName R4 SYMATTR Value 2K SYMBOL Digital\\schmtinv 304 448 R0 SYMATTR InstName A2 SYMATTR Value2 Vhigh=5 Vt=2.5 Vh=1 SYMATTR SpiceLine Td=5n SYMBOL Digital\\schmtinv 304 384 R0 SYMATTR InstName A3 SYMATTR Value2 Vhigh=5 Vt=2.5 Vh=1 SYMATTR SpiceLine Td=5n SYMBOL Digital\\schmtinv 304 512 R0 SYMATTR InstName A4 SYMATTR Value2 Vhigh=5 Vt=2.5 Vh=1 SYMATTR SpiceLine Td=5n SYMBOL Digital\\schmtinv 304 320 R0 SYMATTR InstName A5 SYMATTR Value2 Vhigh=5 Vt=2.5 Vh=1 SYMATTR SpiceLine Td=5n SYMBOL cap 1424 352 R0 WINDOW 0 -70 43 Left 2 WINDOW 3 -64 77 Left 2 SYMATTR InstName C5 SYMATTR Value 4µ SYMBOL res 640 320 R0 WINDOW 0 47 70 Left 2 WINDOW 3 41 102 Left 2 SYMATTR InstName R7 SYMATTR Value 1m SYMBOL res 640 672 R0 WINDOW 0 70 52 Left 2 WINDOW 3 75 86 Left 2 SYMATTR InstName R10 SYMATTR Value 0.2 SYMBOL Comparators\\LT1011 368 704 M0 SYMATTR InstName U1 SYMBOL voltage -96 160 R0 WINDOW 0 63 53 Left 2 WINDOW 3 61 85 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 0.2 SYMBOL Comparators\\LT1011 368 912 M0 SYMATTR InstName U2 SYMBOL voltage -96 464 R0 WINDOW 0 61 45 Left 2 WINDOW 3 54 83 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value 1.25 SYMBOL res 640 912 R0 WINDOW 0 -56 37 Left 2 WINDOW 3 -57 71 Left 2 SYMATTR InstName R5 SYMATTR Value 1K SYMBOL res 832 880 R90 WINDOW 0 69 56 VBottom 2 WINDOW 3 74 56 VTop 2 SYMATTR InstName R11 SYMATTR Value 37.4K SYMBOL cap 800 288 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 2µ SYMATTR SpiceLine Rser=.008 SYMBOL res 640 608 R90 WINDOW 0 65 54 VBottom 2 WINDOW 3 71 54 VTop 2 SYMATTR InstName R2 SYMATTR Value 1K SYMBOL cap 496 720 R0 WINDOW 0 54 32 Left 2 WINDOW 3 43 63 Left 2 SYMATTR InstName C8 SYMATTR Value 300p SYMBOL schottky 880 416 R180 WINDOW 0 42 2 Left 2 WINDOW 3 -44 -85 Left 2 SYMATTR InstName D2 SYMATTR Value 10MQ060N SYMATTR Description Diode SYMATTR Type diode SYMBOL res 1424 208 R0 SYMATTR InstName R12 SYMATTR Value 8m SYMBOL res 224 128 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R13 SYMATTR Value .01 TEXT 1184 576 Left 2 !.tran 0 4m 20u 10n uic TEXT 1168 480 Left 2 ;SKEPTIC CONVERTER TEXT 1208 528 Left 2 ;JL July 3 2013 TEXT 688 128 Left 2 !K L1 L2 0.99 TEXT 192 624 Left 2 ;74HC14 TEXT 160 504 Left 2 ;OSC TEXT 736 176 Left 2 ;1:1 TEXT 160 808 Left 2 ;USE LM393

It's not necessary - ignoring input and output esr, but measuring the real peak currents flowing in the sensors, easily sends efficiency below 50%; The fact that it's better than 50% in the early stages is the effect if the leakage terms in the choke - but these are not employed effectively at the conversion frequency.

If you look at the postive terminal of V3, you'll see that it's not '9'.

Version 4 SHEET 1 1920 1092 WIRE 464 96 336 96 WIRE -48 144 -96 144 WIRE -16 144 -48 144 WIRE 240 144 96 144 WIRE 320 144 240 144 WIRE 464 144 464 96 WIRE 464 144 400 144 WIRE 528 144 464 144 WIRE 656 144 608 144 WIRE 912 144 864 144 WIRE 1056 144 992 144 WIRE 1152 144 1056 144 WIRE 1264 144 1216 144 WIRE 1312 144 1264 144 WIRE 1440 144 1392 144 WIRE 1456 144 1440 144 WIRE 1472 144 1456 144 WIRE -96 176 -96 144 WIRE 96 176 96 144 WIRE 240 240 240 144 WIRE 320 240 240 240 WIRE 464 240 464 144 WIRE 464 240 384 240 WIRE 1264 240 1264 144 WIRE 1312 240 1264 240 WIRE 1440 240 1440 144 WIRE 1440 240 1376 240 WIRE 1440 288 1440 240 WIRE 608 304 576 304 WIRE 656 304 656 144 WIRE 656 304 608 304 WIRE 736 304 656 304 WIRE 864 304 864 144 WIRE 864 304 800 304 WIRE -96 320 -96 256 WIRE 96 320 96 256 WIRE 656 336 656 304 WIRE 1056 336 1056 144 WIRE 864 352 864 304 WIRE 304 384 272 384 WIRE 400 384 368 384 WIRE 1440 400 1440 352 WIRE 656 432 656 416 WIRE -48 448 -96 448 WIRE -16 448 -48 448 WIRE 144 448 96 448 WIRE 272 448 272 384 WIRE 272 448 224 448 WIRE 304 448 272 448 WIRE 400 448 400 384 WIRE 400 448 368 448 WIRE 864 448 864 416 WIRE -96 480 -96 448 WIRE 1056 480 1056 416 WIRE 272 512 272 448 WIRE 304 512 272 512 WIRE 400 512 400 448 WIRE 400 512 368 512 WIRE 432 512 400 512 WIRE 560 512 512 512 WIRE 608 512 560 512 WIRE 96 576 96 448 WIRE 160 576 96 576 WIRE 272 576 272 512 WIRE 272 576 224 576 WIRE 304 576 272 576 WIRE 400 576 400 512 WIRE 400 576 368 576 WIRE 1056 592 1056 544 WIRE -96 624 -96 560 WIRE 400 624 368 624 WIRE 544 624 512 624 WIRE 656 624 656 528 WIRE 656 624 624 624 WIRE 368 656 368 624 WIRE 1120 672 1056 672 WIRE 1264 672 1200 672 WIRE 1312 672 1264 672 WIRE 1328 672 1312 672 WIRE 512 688 512 624 WIRE 512 688 400 688 WIRE 656 688 656 624 WIRE 96 704 96 576 WIRE 144 704 96 704 WIRE 320 704 144 704 WIRE 448 720 400 720 WIRE 464 720 448 720 WIRE 512 720 512 688 WIRE 1056 720 1056 672 WIRE 1264 736 1264 672 WIRE 368 768 368 752 WIRE 384 768 384 752 WIRE 384 768 368 768 WIRE 368 784 368 768 WIRE 512 816 512 784 WIRE 656 816 656 768 WIRE 400 832 368 832 WIRE 368 864 368 832 WIRE 1056 880 1056 800 WIRE 1264 880 1264 800 WIRE 656 896 400 896 WIRE 736 896 656 896 WIRE 864 896 816 896 WIRE 896 896 864 896 WIRE 96 912 96 704 WIRE 320 912 96 912 WIRE 96 928 96 912 WIRE 448 928 400 928 WIRE 480 928 448 928 WIRE 656 928 656 896 WIRE 368 976 368 960 WIRE 384 976 384 960 WIRE 384 976 368 976 WIRE 368 992 368 976 WIRE 96 1040 96 992 WIRE 656 1040 656 1008 FLAG 1456 144 VP FLAG 656 816 0 FLAG 96 320 0 FLAG 608 304 DRAIN FLAG 560 512 GATE FLAG 864 448 0 FLAG 1056 592 0 FLAG 1056 880 0 FLAG 1312 672 EFF FLAG 1264 880 0 FLAG 96 1040 0 FLAG 144 704 rc FLAG 1440 400 0 FLAG 336 96 9V FLAG 368 784 0 FLAG 400 624 9V FLAG 448 720 0.2V FLAG -96 320 0 FLAG -48 144 0.2V FLAG 368 992 0 FLAG 400 832 9V FLAG -96 624 0 FLAG -48 448 1.25V FLAG 448 928 1.25V FLAG 656 1040 0 FLAG 864 896 VP FLAG 512 816 0 SYMBOL ind2 512 160 R270 WINDOW 0 -41 56 VTop 2 WINDOW 3 -53 53 VBottom 2 SYMATTR InstName L1 SYMATTR Value 5µ SYMATTR Type ind SYMATTR SpiceLine Rser=0.06 SYMBOL schottky 1152 160 R270 WINDOW 0 -41 30 VTop 2 WINDOW 3 -49 27 VBottom 2 SYMATTR InstName D1 SYMATTR Value 10MQ060N SYMATTR Description Diode SYMATTR Type diode SYMBOL voltage 96 160 R0 WINDOW 0 60 48 Left 2 WINDOW 3 67 80 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 67 108 Left 2 SYMATTR InstName V2 SYMATTR Value 9 SYMATTR SpiceLine Rser=.005 SYMBOL nmos 608 432 R0 WINDOW 0 -55 -55 Left 2 WINDOW 3 -101 -22 Left 2 SYMATTR InstName M1 SYMATTR Value Si7218DN SYMBOL ind2 896 160 R270 WINDOW 0 -32 56 VTop 2 WINDOW 3 -41 57 VBottom 2 SYMATTR InstName L2 SYMATTR Value 5µ SYMATTR Type ind SYMATTR SpiceLine Rser=0.06 SYMBOL res 528 496 R90 WINDOW 0 -15 56 VBottom 2 WINDOW 3 46 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 10 SYMBOL res 1296 160 R270 WINDOW 0 -38 31 VTop 2 WINDOW 3 -11 86 VBottom 2 SYMATTR InstName R6 SYMATTR Value .01m SYMBOL cap 1376 224 R90 WINDOW 0 68 59 VBottom 2 WINDOW 3 42 -8 VTop 2 SYMATTR InstName C3 SYMATTR Value 50p SYMBOL res 304 160 R270 WINDOW 0 -37 24 VTop 2 WINDOW 3 -11 88 VBottom 2 SYMATTR InstName R8 SYMATTR Value .01m SYMBOL cap 384 224 R90 WINDOW 0 71 54 VBottom 2 WINDOW 3 43 0 VTop 2 SYMATTR InstName C6 SYMATTR Value 50p SYMBOL res 1040 320 R0 WINDOW 0 59 38 Left 2 WINDOW 3 58 74 Left 2 SYMATTR InstName R9 SYMATTR Value 500 SYMBOL cap 1040 480 R0 WINDOW 0 -46 35 Left 2 WINDOW 3 -50 68 Left 2 SYMATTR InstName C7 SYMATTR Value 30p SYMBOL bv 1056 704 R0 WINDOW 3 -110 247 Left 2 WINDOW 0 -83 97 Left 2 SYMATTR Value V= LIMIT (0, 100 * I(R6) * V(VP) / ( I(R8) * V(9V) ),

120) SYMATTR InstName B1 SYMBOL res 1216 656 R90 WINDOW 0 70 60 VBottom 2 WINDOW 3 78 61 VTop 2 SYMATTR InstName R1 SYMATTR Value 1K SYMBOL cap 1248 736 R0 WINDOW 0 -37 63 Left 2 WINDOW 3 -43 94 Left 2 SYMATTR InstName C2 SYMATTR Value 10n SYMBOL Digital\\schmtinv 160 512 R0 SYMATTR InstName A1 SYMATTR Value2 Vhigh=5 Vt=2.5 Vh=0.5 SYMATTR SpiceLine Td=5n SYMBOL cap 80 928 R0 WINDOW 0 44 60 Left 2 WINDOW 3 37 92 Left 2 SYMATTR InstName C4 SYMATTR Value 500p SYMBOL res 128 464 R270 WINDOW 0 88 58 VTop 2 WINDOW 3 74 57 VBottom 2 SYMATTR InstName R4 SYMATTR Value 2K SYMBOL Digital\\schmtinv 304 448 R0 SYMATTR InstName A2 SYMATTR Value2 Vhigh=5 Vt=2.5 Vh=1 SYMATTR SpiceLine Td=5n SYMBOL Digital\\schmtinv 304 384 R0 SYMATTR InstName A3 SYMATTR Value2 Vhigh=5 Vt=2.5 Vh=1 SYMATTR SpiceLine Td=5n SYMBOL Digital\\schmtinv 304 512 R0 SYMATTR InstName A4 SYMATTR Value2 Vhigh=5 Vt=2.5 Vh=1 SYMATTR SpiceLine Td=5n SYMBOL Digital\\schmtinv 304 320 R0 SYMATTR InstName A5 SYMATTR Value2 Vhigh=5 Vt=2.5 Vh=1 SYMATTR SpiceLine Td=5n SYMBOL cap 1424 288 R0 WINDOW 0 -70 43 Left 2 WINDOW 3 -64 77 Left 2 SYMATTR InstName C5 SYMATTR Value 4µ SYMATTR SpiceLine Rser=.008 SYMBOL res 640 320 R0 WINDOW 0 47 70 Left 2 WINDOW 3 41 102 Left 2 SYMATTR InstName R7 SYMATTR Value 1m SYMBOL res 640 672 R0 WINDOW 0 70 52 Left 2 WINDOW 3 75 86 Left 2 SYMATTR InstName R10 SYMATTR Value 0.2 SYMBOL Comparators\\LT1011 368 704 M0 SYMATTR InstName U1 SYMBOL voltage -96 160 R0 WINDOW 0 63 53 Left 2 WINDOW 3 61 85 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 0.2 SYMBOL Comparators\\LT1011 368 912 M0 SYMATTR InstName U2 SYMBOL voltage -96 464 R0 WINDOW 0 61 45 Left 2 WINDOW 3 54 83 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value 1.25 SYMBOL res 640 912 R0 WINDOW 0 -56 37 Left 2 WINDOW 3 -57 71 Left 2 SYMATTR InstName R5 SYMATTR Value 1K SYMBOL res 832 880 R90 WINDOW 0 69 56 VBottom 2 WINDOW 3 74 56 VTop 2 SYMATTR InstName R11 SYMATTR Value 37.4K SYMBOL cap 800 288 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 2µ SYMATTR SpiceLine Rser=.008 SYMBOL res 640 608 R90 WINDOW 0 65 54 VBottom 2 WINDOW 3 71 54 VTop 2 SYMATTR InstName R2 SYMATTR Value 1K SYMBOL cap 496 720 R0 WINDOW 0 54 32 Left 2 WINDOW 3 43 63 Left 2 SYMATTR InstName C8 SYMATTR Value 300p SYMBOL schottky 880 416 R180 WINDOW 0 42 2 Left 2 WINDOW 3 -44 -85 Left 2 SYMATTR InstName D2 SYMATTR Value 10MQ060N SYMATTR Description Diode SYMATTR Type diode TEXT 1184 576 Left 2 !.tran 0 4m 10u 10n uic TEXT 1168 480 Left 2 ;SKEPTIC CONVERTER TEXT 1208 528 Left 2 ;JL July 3 2013 TEXT 688 128 Left 2 !K L1 L2 0.99 TEXT 192 624 Left 2 ;74HC14 TEXT 160 504 Left 2 ;OSC TEXT 736 176 Left 2 ;1:1 TEXT 160 808 Left 2 ;USE LM393
Reply to
legg

I did already. Wimp. Wimp. Whine, Whine. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142   Skype: Contacts Only  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.
Reply to
Jim Thompson

I really have you in a tizzy. I've succeeded >:-} ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142   Skype: Contacts Only  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.
Reply to
Jim Thompson

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