Version 4
SHEET 1 968 680
WIRE 112 -176 -48 -176
WIRE 512 -176 112 -176
WIRE 960 -176 576 -176
WIRE -368 -160 -384 -160
WIRE -352 -160 -368 -160
WIRE -272 -160 -288 -160
WIRE -256 -160 -272 -160
WIRE -384 -128 -384 -160
WIRE -288 -128 -288 -160
WIRE -48 -64 -48 -176
WIRE -384 -16 -384 -48
WIRE -288 -16 -288 -48
WIRE 112 48 112 -176
WIRE 192 48 112 48
WIRE 320 48 256 48
WIRE 512 64 464 64
WIRE 640 64 576 64
WIRE 832 80 784 80
WIRE 960 80 960 -176
WIRE 960 80 896 80
WIRE 192 128 176 128
WIRE 224 128 192 128
WIRE -48 144 -48 16
WIRE 512 144 496 144
WIRE 544 144 512 144
WIRE 224 160 224 128
WIRE 832 160 816 160
WIRE 864 160 832 160
WIRE 112 176 112 48
WIRE 192 176 112 176
WIRE 544 176 544 144
WIRE 320 192 320 48
WIRE 320 192 256 192
WIRE 352 192 320 192
WIRE 464 192 464 64
WIRE 464 192 432 192
WIRE 512 192 464 192
WIRE 864 192 864 160
WIRE 192 208 112 208
WIRE 640 208 640 64
WIRE 640 208 576 208
WIRE 672 208 640 208
WIRE 784 208 784 80
WIRE 784 208 752 208
WIRE 832 208 784 208
WIRE 512 224 464 224
WIRE 960 224 960 80
WIRE 960 224 896 224
WIRE 832 240 784 240
WIRE 192 256 176 256
WIRE 224 256 224 224
WIRE 224 256 192 256
WIRE 512 272 496 272
WIRE 544 272 544 240
WIRE 544 272 512 272
WIRE 832 288 816 288
WIRE 864 288 864 256
WIRE 864 288 832 288
WIRE 464 304 464 224
WIRE -48 320 -48 224
WIRE 784 320 784 240
WIRE 112 352 112 208
WIRE 640 352 640 208
WIRE 640 352 112 352
FLAG 192 256 Vee
FLAG 192 128 Vcc
FLAG -384 -16 0
FLAG -288 -16 0
FLAG -272 -160 Vcc
FLAG -368 -160 Vee
FLAG 464 304 0
FLAG 512 272 Vee
FLAG 512 144 Vcc
FLAG 784 320 0
FLAG 832 288 Vee
FLAG 832 160 Vcc
FLAG -48 320 0
SYMBOL cap 256 32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 1uF
SYMBOL Opamps\\UniversalOpamp2 224 192 R0
SYMATTR InstName U3
SYMBOL voltage -288 -144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 15V
SYMBOL voltage -384 -32 R180
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 15V
SYMBOL cap 576 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 1uF
SYMBOL Opamps\\UniversalOpamp2 544 208 R0
SYMATTR InstName U2
SYMBOL cap 896 64 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1uF
SYMBOL Opamps\\UniversalOpamp2 864 224 R0
SYMATTR InstName U1
SYMBOL res -64 -80 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL voltage -48 128 R0
SYMATTR InstName V0
SYMATTR Value 0.04V
SYMBOL res 448 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 2k
SYMBOL res 768 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 100
SYMBOL diode 512 -160 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D
SYMATTR Value 1N4148
TEXT -440 56 Left 2 !.tran 0 1 100m 0.001m