Version 4
SHEET 1 1296 680
WIRE 240 -96 80 -96
WIRE 608 -96 240 -96
WIRE 80 -64 80 -96
WIRE 240 -64 240 -96
WIRE -48 16 -48 -16
WIRE 80 32 80 16
WIRE 416 64 416 48
WIRE 240 80 240 16
WIRE 384 80 240 80
WIRE 608 96 608 -96
WIRE 608 96 448 96
WIRE 672 96 608 96
WIRE 80 112 80 96
WIRE 160 112 80 112
WIRE 384 112 160 112
WIRE -48 128 -48 96
WIRE 16 128 -48 128
WIRE 240 128 240 80
WIRE 416 144 416 128
WIRE 608 144 608 96
WIRE -48 160 -48 128
WIRE 16 160 16 128
WIRE 80 240 80 112
WIRE 160 240 160 112
WIRE 336 240 288 240
WIRE 368 240 336 240
WIRE 480 240 448 240
WIRE 512 240 480 240
WIRE 608 240 608 208
WIRE 608 240 576 240
WIRE 336 256 336 240
WIRE 608 256 608 240
WIRE -48 272 -48 240
WIRE 480 272 480 240
WIRE 80 352 80 304
WIRE 160 352 160 320
WIRE 240 352 240 304
WIRE 336 352 336 336
WIRE 480 352 480 336
WIRE 608 352 608 336
FLAG 80 352 0
FLAG 160 352 0
FLAG 240 352 0
FLAG 480 352 0
FLAG 336 352 0
FLAG 608 352 0
FLAG 672 96 OUT
FLAG 16 160 0
FLAG -48 -16 V+
FLAG -48 272 V-
FLAG 416 48 V+
FLAG 416 144 V-
SYMBOL res 64 -80 R0
SYMATTR InstName R1
SYMATTR Value 50k
SYMBOL res 144 224 R0
SYMATTR InstName R2
SYMATTR Value 50k
SYMBOL cap 64 32 R0
SYMATTR InstName C1
SYMATTR Value 1n
SYMBOL cap 64 240 R0
SYMATTR InstName C2
SYMATTR Value 1n
SYMATTR Value2 IC=1
SYMBOL res 224 -80 R0
SYMATTR InstName R3
SYMATTR Value 3k3
SYMBOL res 224 112 R0
SYMATTR InstName R4
SYMATTR Value 1k5
SYMBOL njf 288 304 R180
SYMATTR InstName J1
SYMATTR Value 2N3819
SYMBOL cap 464 272 R0
SYMATTR InstName C3
SYMATTR Value 100n
SYMBOL res 320 240 R0
SYMATTR InstName R5
SYMATTR Value 5k6
SYMBOL diode 512 256 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL res 592 240 R0
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL cap 592 144 R0
SYMATTR InstName C4
SYMATTR Value 10n
SYMBOL Opamps\\LT1055 416 32 R0
SYMATTR InstName U1
SYMBOL res 464 224 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 100k
SYMBOL voltage -48 0 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage -48 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 15
TEXT 368 -32 Left 2 !.lib opamp.sub
TEXT 368 -56 Left 2 !.tran 0 40m 39m 1u