Version 4
SHEET 1 1364 680
WIRE 608 -352 -192 -352
WIRE 688 -352 608 -352
WIRE 448 -304 448 -320
WIRE 608 -256 608 -352
WIRE 1008 -240 896 -240
WIRE 448 -208 448 -224
WIRE 448 -208 128 -208
WIRE 512 -208 448 -208
WIRE 544 -208 512 -208
WIRE 688 -208 688 -352
WIRE 128 -176 128 -208
WIRE 624 -160 608 -160
WIRE 688 -80 688 -112
WIRE 688 -80 608 -80
WIRE 784 -80 688 -80
WIRE 896 -80 896 -176
WIRE 896 -80 864 -80
WIRE 928 -80 896 -80
WIRE 64 -64 0 -64
WIRE 1008 -64 1008 -240
WIRE 1008 -64 992 -64
WIRE 1088 -64 1072 -64
WIRE 64 -48 64 -64
WIRE 928 -48 896 -48
WIRE -192 -16 -192 -352
WIRE -96 -16 -96 -80
WIRE 512 0 512 -208
WIRE 1088 0 1088 -64
WIRE 1088 0 512 0
WIRE 688 32 688 -80
WIRE 896 32 896 -48
WIRE 128 48 128 -112
WIRE 176 48 128 48
WIRE 368 64 240 64
WIRE 448 64 448 -208
WIRE 448 64 432 64
WIRE 64 80 64 32
WIRE 176 80 64 80
WIRE 0 96 0 -64
WIRE 128 96 128 48
WIRE 896 112 688 112
WIRE -96 192 -96 64
WIRE 0 192 0 176
WIRE 0 192 -96 192
WIRE 128 192 128 176
WIRE 128 192 0 192
WIRE 448 192 128 192
WIRE 528 192 448 192
WIRE 656 192 528 192
WIRE 688 192 688 112
WIRE 688 192 656 192
WIRE 880 192 688 192
WIRE 976 192 880 192
WIRE -96 208 -96 192
WIRE 128 208 128 192
WIRE 448 224 448 192
WIRE 688 240 688 192
WIRE 64 288 64 80
WIRE 128 288 128 272
WIRE 128 288 64 288
WIRE 64 320 64 288
WIRE 128 320 128 288
WIRE 528 352 528 192
WIRE -192 416 -192 64
WIRE 64 416 64 400
WIRE 64 416 -192 416
WIRE 128 416 128 384
WIRE 128 416 64 416
WIRE 528 416 128 416
WIRE 592 416 592 240
WIRE 592 416 528 416
WIRE 688 416 688 384
WIRE 688 416 592 416
WIRE 880 416 880 272
WIRE 880 416 688 416
WIRE 976 416 880 416
FLAG 448 224 0
FLAG -96 -80 +5v
FLAG 208 32 +5v
FLAG 960 -96 +5v
FLAG -96 288 -3v
FLAG 208 96 -3v
FLAG 960 -32 -3v
FLAG 448 -320 +5v
FLAG 592 64 +5v
SYMBOL cap 672 240 R0
SYMATTR InstName C1
SYMATTR Value 100µ
SYMBOL res 464 -208 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL voltage 896 16 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 1 55 Left 2
SYMATTR Value 1
SYMATTR InstName VI
SYMBOL voltage 0 80 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -162 -342 Left 2
SYMATTR Value PULSE(1.25 2.5 4m 1m 1m 5m)
SYMATTR InstName VU
SYMBOL voltage -96 -32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL voltage -192 -32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 36
SYMBOL res 48 304 R0
SYMATTR InstName R2
SYMATTR Value 50k
SYMBOL res 48 -64 R0
WINDOW 0 -36 34 Left 2
WINDOW 3 -34 74 Left 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 672 16 R0
SYMATTR InstName R4
SYMATTR Value 0.5
SYMBOL res 880 -96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL npn 624 -208 R0
SYMATTR InstName Q1
SYMATTR Value 2N3055
SYMBOL voltage -96 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 3
SYMBOL res 112 80 R0
SYMATTR InstName R8
SYMATTR Value 10k
SYMBOL cap 112 -176 R0
SYMATTR InstName C2
SYMATTR Value 1n
SYMBOL cap 880 -240 R0
SYMATTR InstName C3
SYMATTR Value 1n
SYMBOL cap 112 320 R0
SYMATTR InstName C4
SYMATTR Value 220p
SYMBOL npn 544 -256 R0
WINDOW 3 -32 -52 Left 2
SYMATTR Value 2N2219A
SYMATTR InstName Q2
SYMBOL schottky 112 208 R0
SYMATTR InstName D1
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL Opamps\\UniversalOpamp2 208 64 R0
SYMATTR InstName U2
SYMBOL Opamps\\UniversalOpamp2 960 -64 R0
SYMATTR InstName U3
SYMBOL diode 432 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D2
SYMBOL diode 1072 -80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D3
SYMBOL res 672 288 R0
SYMATTR InstName R10
SYMATTR Value 1
SYMBOL pnp 656 240 R180
SYMATTR InstName Q3
SYMBOL res 608 160 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R7
SYMATTR Value 500
SYMBOL current 880 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName I1
SYMATTR Value PULSE(0.1 1 1m 1u 1u 2m 4m)
SYMBOL res 624 -64 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R6
SYMATTR Value 220
SYMBOL diode 544 416 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D4
TEXT 736 -344 Left 2 !.tran 8m