Version 4
SHEET 1 1024 680
WIRE 576 -96 96 -96
WIRE 496 -32 496 -48
WIRE 160 -16 32 -16
WIRE 272 -16 160 -16
WIRE 304 -16 272 -16
WIRE 400 -16 368 -16
WIRE 432 -16 400 -16
WIRE 464 -16 432 -16
WIRE 576 0 576 -96
WIRE 576 0 528 0
WIRE 608 0 576 0
WIRE 32 16 32 -16
WIRE 160 16 160 -16
WIRE 464 16 432 16
WIRE 96 32 96 -96
WIRE 96 32 80 32
WIRE 112 32 96 32
WIRE 496 48 496 32
WIRE 96 80 80 80
WIRE 112 80 96 80
WIRE 336 80 336 64
WIRE 576 80 576 0
WIRE 272 96 272 -16
WIRE 304 96 272 96
WIRE -416 112 -416 80
WIRE -320 112 -320 80
WIRE -224 112 -224 80
WIRE 160 112 160 96
WIRE 400 112 400 -16
WIRE 400 112 368 112
WIRE 304 128 272 128
WIRE -80 160 -112 160
WIRE 32 160 32 96
WIRE 32 160 0 160
WIRE 336 160 336 144
WIRE -416 224 -416 192
WIRE -320 224 -320 192
WIRE -224 224 -224 192
WIRE 96 224 96 80
WIRE 96 224 64 224
WIRE 160 224 160 192
WIRE 304 224 272 224
WIRE 432 224 432 16
WIRE 432 224 384 224
WIRE 576 224 576 160
WIRE 576 224 432 224
FLAG -416 224 0
FLAG 336 160 0
FLAG 496 48 0
FLAG -416 80 Ub
FLAG 336 64 Ub
FLAG 496 -48 Ub
FLAG 272 128 Uref
FLAG -320 224 0
FLAG -320 80 Uref
FLAG 64 224 Uref
FLAG -224 224 0
FLAG -224 80 Ue
FLAG -112 160 Ue
FLAG 160 224 0
FLAG 272 224 Uref
FLAG 608 0 Ua
FLAG 432 -16 U2
FLAG 432 16 Us
SYMBOL voltage -416 96 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5V
SYMBOL Opamps\\LT1013 336 48 R0
SYMATTR InstName U2B
SYMBOL Opamps\\LT1013 496 -64 R0
SYMATTR InstName U2D
SYMBOL cap 304 -32 M90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C11
SYMATTR Value 680n
SYMBOL voltage -320 96 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 2.5V
SYMBOL sw 32 0 M0
SYMATTR InstName S1
SYMATTR Value ANASW
SYMBOL sw 160 112 M180
SYMATTR InstName S2
SYMATTR Value ANASW
SYMBOL res 16 144 R90
WINDOW 0 4 56 VBottom 0
WINDOW 3 27 56 VTop 0
SYMATTR InstName R33
SYMATTR Value 10k
SYMBOL res 144 96 R0
SYMATTR InstName R35
SYMATTR Value 10k
SYMBOL voltage -224 96 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 3V
SYMBOL res 560 64 R0
SYMATTR InstName R30
SYMATTR Value 3k32
SYMBOL res 288 240 R270
WINDOW 0 27 56 VTop 0
WINDOW 3 4 56 VBottom 0
SYMATTR InstName R29
SYMATTR Value 10k
TEXT -144 232 Left 0 !.tran 0 0.1s 0 uic
TEXT -144 264 Left 0 !.model anasw sw(ron=10 roff=10Meg vt=0 vh=0.1)