Version 4
SHEET 1 880 680
WIRE -576 224 -576 192
WIRE -576 368 -576 304
WIRE -464 224 -464 176
WIRE -464 368 -576 368
WIRE -464 368 -464 304
WIRE -464 384 -464 368
WIRE -352 240 -352 176
WIRE -352 368 -464 368
WIRE -352 368 -352 320
WIRE -240 176 -352 176
WIRE -240 240 -240 176
WIRE -240 368 -352 368
WIRE -240 368 -240 304
WIRE -176 176 -240 176
WIRE -176 240 -176 176
WIRE -176 368 -240 368
WIRE -176 368 -176 304
WIRE -112 176 -176 176
WIRE -112 208 -112 176
WIRE -112 368 -176 368
WIRE -112 368 -112 288
WIRE -80 176 -112 176
WIRE -32 -144 -64 -144
WIRE -32 -80 -32 -144
WIRE -32 48 -32 0
WIRE -32 112 -32 48
WIRE -32 240 -32 208
WIRE 0 48 -32 48
WIRE 32 240 -32 240
WIRE 64 -144 -32 -144
WIRE 64 -96 64 -144
WIRE 64 0 64 -32
WIRE 64 144 64 96
WIRE 64 208 64 144
WIRE 64 368 -112 368
WIRE 64 368 64 272
WIRE 176 144 64 144
WIRE 176 144 176 32
WIRE 224 32 176 32
WIRE 288 -144 256 -144
WIRE 288 -128 288 -144
WIRE 288 -32 288 -48
WIRE 288 -16 288 -32
WIRE 288 112 288 80
WIRE 288 144 288 112
WIRE 288 240 288 224
WIRE 320 112 288 112
WIRE 336 -32 288 -32
WIRE 416 240 288 240
WIRE 416 272 416 240
WIRE 416 368 64 368
WIRE 416 368 416 352
WIRE 432 112 400 112
WIRE 528 -144 288 -144
WIRE 528 -128 528 -144
WIRE 528 -32 480 -32
WIRE 528 -32 528 -48
WIRE 528 -16 528 -32
WIRE 528 112 496 112
WIRE 528 112 528 80
WIRE 528 144 528 112
WIRE 528 240 416 240
WIRE 528 240 528 224
WIRE 656 32 592 32
WIRE 688 -144 656 -144
WIRE 688 -112 688 -144
WIRE 688 0 688 -32
WIRE 688 224 688 64
WIRE 688 368 416 368
WIRE 688 368 688 304
FLAG -464 384 0
FLAG -464 176 +25
FLAG -576 192 +200
FLAG -64 -144 +25
FLAG 256 -144 +200
FLAG 656 -144 +25
FLAG 336 -32 Y0
FLAG 480 -32 Y1
SYMBOL voltage -464 208 R0
WINDOW 3 -13 58 Left 0
SYMATTR InstName V25
SYMATTR Value 25
SYMBOL njf -80 112 R0
WINDOW 0 -17 43 Left 0
WINDOW 3 21 47 Left 0
SYMATTR InstName J1
SYMATTR Value 2N3819
SYMBOL Robertugo\\Pote 48 176 R0
SYMATTR InstName U1
SYMATTR Value Rt=4K7
SYMATTR Value2 Set=.15
SYMBOL npn 224 -16 R0
SYMATTR InstName Q1
SYMATTR Value BFN26
SYMBOL pnp 0 96 M180
WINDOW 0 -136 79 Left 0
WINDOW 3 -136 48 Left 0
SYMATTR InstName Q2
SYMATTR Value BC556B
SYMBOL zener 80 -32 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Invisible 0
SYMATTR InstName D1
SYMATTR Value BZX84C3V3
SYMBOL voltage -576 208 R0
WINDOW 3 -22 56 Left 0
SYMATTR InstName V200
SYMATTR Value 200
SYMBOL res -48 -96 R0
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL res -128 192 R0
SYMATTR InstName R2
SYMATTR Value 1e6
SYMBOL diode -192 240 R0
WINDOW 3 24 72 Invisible 0
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL diode -224 304 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Invisible 0
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL voltage -352 224 R0
WINDOW 0 -16 60 Left 0
WINDOW 3 -17 174 Left 0
WINDOW 123 -17 202 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vs
SYMATTR Value SINE(0 .5 10k)
SYMATTR Value2 AC .1
SYMBOL res 272 128 R0
SYMATTR InstName R3
SYMATTR Value 220
SYMBOL res 272 -144 R0
SYMATTR InstName R4
SYMATTR Value 22K
SYMBOL res 400 256 R0
SYMATTR InstName R5
SYMATTR Value 1K
SYMBOL npn 592 -16 M0
SYMATTR InstName Q3
SYMATTR Value BFN26
SYMBOL res 512 128 R0
SYMATTR InstName R6
SYMATTR Value 220
SYMBOL res 512 -144 R0
SYMATTR InstName R7
SYMATTR Value 22K
SYMBOL res 672 208 R0
SYMATTR InstName R8
SYMATTR Value 10K
SYMBOL Robertugo\\Pote 672 -32 R0
SYMATTR InstName U2
SYMATTR Value Rt=4K7
SYMATTR Value2 Set=.45
SYMBOL res 672 -128 R0
SYMATTR InstName R9
SYMATTR Value 1K
SYMBOL res 416 96 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName Rvar
SYMATTR Value 250
SYMBOL cap 496 96 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName Cvar
SYMATTR Value 15p
TEXT -346 -134 Left 0 !.tran 1m
TEXT -360 144 Left 0 !.four 10k V(Y1,Y0)