Version 4
SHEET 1 1396 680
WIRE 1136 -624 1104 -624
WIRE 1024 -544 1024 -624
WIRE 1024 -544 944 -544
WIRE 1120 -544 1024 -544
WIRE 880 -528 768 -528
WIRE 1008 -512 944 -512
WIRE 1008 -480 1008 -512
WIRE 1024 -480 1008 -480
WIRE 1120 -480 1024 -480
WIRE 1008 -416 1008 -480
WIRE 1216 -416 1216 -432
WIRE 1216 -416 1008 -416
WIRE 768 -368 768 -528
WIRE 1040 -368 768 -368
WIRE 1216 -368 1216 -416
WIRE 1216 -368 1104 -368
WIRE -256 -336 -256 -368
WIRE -160 -336 -256 -336
WIRE -112 -336 -112 -368
WIRE -112 -336 -160 -336
WIRE 1216 -336 1216 -368
WIRE -256 -304 -256 -336
WIRE 1216 -208 1216 -256
WIRE 1216 -208 1152 -208
WIRE 768 -160 768 -368
WIRE 768 -160 80 -160
WIRE -976 -80 -1168 -80
WIRE -880 -80 -976 -80
WIRE -768 -80 -880 -80
WIRE -704 -80 -768 -80
WIRE -496 -80 -608 -80
WIRE -336 -80 -416 -80
WIRE 832 -80 -336 -80
WIRE 976 -80 832 -80
WIRE 1024 -80 976 -80
WIRE 1184 -80 1104 -80
WIRE 1328 -80 1184 -80
WIRE -560 -16 -560 -32
WIRE -560 -16 -656 -16
WIRE 976 32 976 -80
WIRE -768 64 -768 -80
WIRE -704 64 -768 64
WIRE -496 64 -608 64
WIRE -336 64 -336 -80
WIRE -336 64 -416 64
WIRE -560 112 -560 -16
WIRE -560 112 -624 112
WIRE 496 112 288 112
WIRE 544 112 496 112
WIRE 624 112 624 64
WIRE 672 112 624 112
WIRE 1328 112 1328 -80
WIRE -1168 144 -1168 -80
WIRE -880 144 -880 -80
WIRE 288 144 288 112
WIRE 288 144 240 144
WIRE 1184 144 1184 -80
WIRE -976 160 -976 -80
WIRE 176 160 144 160
WIRE -624 176 -624 112
WIRE -512 176 -624 176
WIRE -224 176 -432 176
WIRE -144 176 -224 176
WIRE 320 176 240 176
WIRE 336 176 320 176
WIRE 496 176 416 176
WIRE 832 176 832 -80
WIRE -32 192 -64 192
WIRE 80 192 80 -160
WIRE 80 192 32 192
WIRE 976 192 976 112
WIRE 1152 192 1152 -208
WIRE 1152 192 976 192
WIRE -144 224 -144 176
WIRE 624 240 624 112
WIRE 624 240 544 240
WIRE -512 256 -512 176
WIRE 624 256 624 240
WIRE 976 256 976 192
WIRE 544 288 544 240
WIRE -304 304 -448 304
WIRE -256 304 -304 304
WIRE -144 304 -176 304
WIRE -64 304 -64 192
WIRE -64 304 -144 304
WIRE -32 304 -64 304
WIRE 144 304 144 160
WIRE 144 304 32 304
WIRE 144 352 144 304
WIRE 176 352 144 352
WIRE 320 352 320 176
WIRE -1168 416 -1168 224
WIRE -976 416 -976 224
WIRE -880 416 -880 224
WIRE 832 416 832 256
WIRE 976 416 976 336
WIRE 1184 416 1184 208
FLAG 624 416 0
FLAG 624 -16 +5V
FLAG 208 192 +12V
FLAG 208 128 -12V
FLAG -512 352 -12V
FLAG -224 176 +12V
FLAG 832 416 0
FLAG 976 416 0
FLAG 1184 416 0
FLAG -880 416 0
FLAG -976 416 0
FLAG -1168 416 0
FLAG -304 368 S
FLAG 496 176 S
FLAG -112 -448 +5V
FLAG -160 -336 S
FLAG -256 -224 -12V
FLAG -256 -448 +12V
FLAG 1328 192 0
FLAG 912 -496 +12V
FLAG 912 -560 -12V
FLAG 1136 -624 S
FLAG 1216 -512 CREF
FLAG -112 -256 CREF
FLAG 544 352 0
FLAG 736 112 S
SYMBOL Opamps\\AD823 208 224 R180
SYMATTR InstName U1
SYMBOL res 272 336 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 1.5Meg
SYMBOL cap 320 336 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C6
SYMATTR Value 2.2n
SYMBOL res 432 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 1k
SYMBOL diode 512 176 R180
WINDOW 0 24 64 Left 2
WINDOW 3 36 26 Left 2
SYMATTR InstName CR6
SYMATTR Value 1N914
SYMBOL res 640 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res -400 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R36
SYMATTR Value 0.6
SYMBOL res -400 -96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R35
SYMATTR Value 0.6
SYMBOL res 608 -32 R0
SYMATTR InstName R2
SYMATTR Value 14.3k
SYMBOL res 608 240 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 608 320 R0
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL diode 672 128 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName CR7
SYMATTR Value 1N914
SYMBOL diode -32 320 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName CR5
SYMATTR Value 1N4148
SYMBOL diode -32 208 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName CR4
SYMATTR Value 1N4148
SYMBOL res -160 208 R0
SYMATTR InstName R5
SYMATTR Value 5k
SYMBOL res -160 288 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 1k
SYMBOL diode -288 368 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName CR8
SYMATTR Value 1N914
SYMBOL pnp -448 352 R180
SYMATTR InstName Q1
SYMBOL res -416 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 1.2k
SYMBOL res 1120 -96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 0.1
SYMBOL res 816 160 R0
SYMATTR InstName R11
SYMATTR Value 390
SYMBOL res 960 16 R0
SYMATTR InstName R12
SYMATTR Value 1
SYMBOL res 960 240 R0
SYMATTR InstName R13
SYMATTR Value 500k
SYMBOL cap 1168 144 R0
SYMATTR InstName C1
SYMATTR Value 100µ
SYMBOL res -896 128 R0
SYMATTR InstName R14
SYMATTR Value 2k
SYMBOL cap -992 160 R0
SYMATTR InstName C2
SYMATTR Value 100µ
SYMBOL voltage -1168 128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 19V
SYMBOL voltage -256 -464 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL voltage -256 -320 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 12
SYMBOL voltage -112 -464 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value 5
SYMBOL res 1312 96 R0
SYMATTR InstName R15
SYMATTR Value 500
SYMBOL Opamps\\AD823 912 -464 R180
SYMATTR InstName U2
SYMBOL res 1120 -640 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 31 36 VTop 2
SYMATTR InstName R16
SYMATTR Value 2.5k
SYMBOL res 1200 -528 R0
SYMATTR InstName R17
SYMATTR Value 50k
SYMBOL res 1200 -352 R0
SYMATTR InstName R18
SYMATTR Value 2.5k
SYMBOL cap 1104 -384 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 180p
SYMBOL voltage -112 -352 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V5
SYMATTR Value 5
SYMBOL diode 1008 -544 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 1136 -480 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL cap 528 288 R0
SYMATTR InstName C4
SYMATTR Value 5µ
SYMBOL npn -704 -16 R270
SYMATTR InstName Q2
SYMATTR Value 2N3055
TEXT -1202 450 Left 2 !.tran 20m