Version 4 SHEET 1 2000 1488 WIRE -64 -208 -128 -208 WIRE 96 -208 32 -208 WIRE 320 -208 96 -208 WIRE 448 -208 320 -208 WIRE 640 -208 528 -208 WIRE 320 -176 320 -208 WIRE -128 -112 -128 -208 WIRE -112 -112 -128 -112 WIRE -16 -112 -16 -144 WIRE -16 -112 -32 -112 WIRE 0 -112 -16 -112 WIRE 96 -112 96 -208 WIRE -544 80 -800 80 WIRE -128 80 -128 -112 WIRE -128 80 -240 80 WIRE -64 80 -128 80 WIRE 112 80 32 80 WIRE 352 80 112 80 WIRE 448 80 352 80 WIRE 640 80 640 -208 WIRE 640 80 528 80 WIRE 848 80 640 80 WIRE 1136 80 848 80 WIRE 352 112 352 80 WIRE -128 192 -128 80 WIRE -112 192 -128 192 WIRE -16 192 -16 144 WIRE -16 192 -32 192 WIRE 0 192 -16 192 WIRE 112 192 112 80 WIRE 112 192 96 192 WIRE -592 208 -672 208 WIRE -800 224 -800 80 WIRE -672 224 -672 208 WIRE 320 224 320 -96 WIRE 352 224 352 192 WIRE 352 224 320 224 WIRE 432 224 352 224 WIRE 432 240 432 224 WIRE 48 256 48 -48 WIRE -800 336 -800 304 WIRE -800 336 -864 336 WIRE -672 336 -672 304 WIRE -672 336 -800 336 WIRE -224 336 -224 320 WIRE -224 336 -304 336 WIRE -144 336 -224 336 WIRE 432 336 432 320 WIRE -800 368 -800 336 WIRE -672 368 -672 336 WIRE 352 384 352 224 WIRE 352 384 320 384 WIRE 48 400 48 256 WIRE 96 400 48 400 WIRE 256 400 160 400 WIRE 640 416 640 80 WIRE 640 416 320 416 WIRE -304 448 -304 336 WIRE -144 448 -144 336 WIRE -672 480 -672 448 WIRE -592 480 -672 480 WIRE 640 480 640 416 WIRE -224 496 -240 496 WIRE -208 496 -224 496 WIRE 848 512 848 80 WIRE 848 512 800 512 WIRE 896 512 848 512 WIRE -304 560 -304 544 WIRE -224 560 -224 496 WIRE -224 560 -304 560 WIRE 800 560 800 512 WIRE 896 560 896 512 WIRE -304 576 -304 560 WIRE 640 576 640 560 WIRE 640 576 320 576 WIRE 1136 576 1136 80 WIRE -144 592 -144 544 WIRE 48 592 48 400 WIRE 48 592 -144 592 WIRE 96 592 48 592 WIRE 256 592 160 592 WIRE 640 592 640 576 WIRE -800 608 -800 448 WIRE -544 608 -800 608 WIRE 400 608 320 608 WIRE 400 624 400 608 WIRE -304 672 -304 656 WIRE 800 672 800 624 WIRE 848 672 800 672 WIRE 896 672 896 624 WIRE 896 672 848 672 WIRE 400 720 400 704 WIRE 640 720 640 672 WIRE 848 720 848 672 WIRE 1136 720 1136 656 FLAG 848 720 0 FLAG 400 720 0 FLAG -240 80 Vcc FLAG 288 368 Vcc FLAG 288 560 Vcc FLAG 640 720 0 FLAG -224 320 Vcc FLAG -864 336 0 FLAG -592 208 +5V FLAG -592 480 -5V FLAG -544 80 Vcc FLAG -544 608 Vss FLAG 1136 720 0 FLAG 288 432 -5V FLAG 288 624 -5V FLAG 432 336 -5V FLAG -304 672 -5V SYMBOL cap 880 560 R0 SYMATTR InstName C2 SYMATTR Value 4.7µF SYMATTR SpiceLine Rser=0.5 SYMBOL voltage 400 608 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName Vset SYMATTR Value 5 SYMBOL res 544 64 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 0.25 SYMBOL pnp2 -208 544 M180 SYMATTR InstName Q3 SYMATTR Value 2N3906 SYMBOL res -320 560 R0 SYMATTR InstName R5 SYMATTR Value 2.2k SYMBOL res 336 96 R0 SYMATTR InstName R9 SYMATTR Value 100 SYMBOL res 624 576 R0 SYMATTR InstName R11 SYMATTR Value 10k SYMBOL res 624 464 R0 SYMATTR InstName R12 SYMATTR Value 20k SYMBOL voltage -672 208 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V5 SYMATTR Value 5V SYMBOL voltage -672 352 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V6 SYMATTR Value 5V SYMBOL voltage -800 208 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 18 SYMBOL voltage -800 352 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V4 SYMATTR Value 18 SYMBOL current 432 240 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName Iset SYMATTR Value 1mA SYMBOL cap 784 560 R0 SYMATTR InstName C3 SYMATTR Value 1µF SYMBOL pnp2 32 144 M270 SYMATTR InstName Q1 SYMATTR Value D45H11 SYMBOL npn2 0 256 R270 SYMATTR InstName Q2 SYMATTR Value 2N5550 SYMBOL res -128 208 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 1k SYMBOL pnp2 -240 544 R180 SYMATTR InstName Q6 SYMATTR Value 2N3906 SYMBOL Opamps\\LT1413 288 336 M0 SYMATTR InstName U3 SYMBOL Opamps\\LT1413 288 528 M0 SYMATTR InstName U4 SYMBOL schottky 96 416 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D2 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky 96 608 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D3 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode SYMBOL pnp2 32 -144 M270 SYMATTR InstName Q4 SYMATTR Value D45H11 SYMBOL npn2 0 -48 R270 SYMATTR InstName Q5 SYMATTR Value 2N3904 SYMBOL res -16 -128 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 1k SYMBOL res 544 -224 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 0.25 SYMBOL res 304 -192 R0 SYMATTR InstName R6 SYMATTR Value 100 SYMBOL res 1120 560 R0 SYMATTR InstName R8 SYMATTR Value 1 TEXT -72 928 Left 2 !.tran 100 startup