Version 4
SHEET 1 880 680
WIRE 32 -32 -368 -32
WIRE 288 -32 32 -32
WIRE 64 32 -16 32
WIRE 160 32 144 32
WIRE 176 32 160 32
WIRE 288 32 256 32
WIRE 448 64 448 48
WIRE -320 128 -320 112
WIRE 224 128 224 112
WIRE -368 144 -368 -32
WIRE -352 144 -368 144
WIRE 160 144 160 32
WIRE 192 144 160 144
WIRE -256 160 -288 160
WIRE -224 160 -256 160
WIRE -128 160 -144 160
WIRE -112 160 -128 160
WIRE -16 160 -16 32
WIRE -16 160 -32 160
WIRE 288 160 288 32
WIRE 288 160 256 160
WIRE 448 160 448 144
WIRE 448 160 416 160
WIRE -352 176 -368 176
WIRE 32 176 32 -32
WIRE 160 176 32 176
WIRE 192 176 160 176
WIRE 416 176 416 160
WIRE 448 176 448 160
WIRE -320 208 -320 192
WIRE 224 208 224 192
WIRE -80 256 -80 240
WIRE -128 272 -128 160
WIRE -112 272 -128 272
WIRE 448 272 448 256
WIRE -464 288 -480 288
WIRE -368 288 -368 176
WIRE -368 288 -384 288
WIRE -352 288 -368 288
WIRE -256 288 -256 160
WIRE -256 288 -272 288
WIRE -16 288 -16 160
WIRE -16 288 -48 288
WIRE 80 288 64 288
WIRE 160 288 160 176
WIRE 160 288 144 288
WIRE 176 288 160 288
WIRE 288 288 288 160
WIRE 288 288 256 288
WIRE -480 304 -480 288
WIRE -112 304 -144 304
WIRE -144 336 -144 304
WIRE -80 336 -80 320
WIRE 64 384 64 288
FLAG 416 176 0
FLAG 224 112 V+
FLAG 448 48 V+
FLAG 224 208 V-
FLAG 448 272 V-
FLAG -320 112 V+
FLAG -320 208 V-
FLAG 64 384 0
FLAG -480 304 0
FLAG -80 336 V-
FLAG -80 240 V+
FLAG -144 336 0
FLAG 288 -32 Output
SYMBOL voltage 448 48 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage 448 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL Opamps\\LT1014 224 96 R0
SYMATTR InstName U1
SYMBOL res 272 48 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 2k
SYMBOL res 272 304 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value 2k
SYMBOL cap 144 272 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 47n
SYMBOL res 160 48 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL Opamps\\LT1014 -320 96 R0
SYMATTR InstName U2
SYMBOL res -368 304 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 4k
SYMBOL res -256 304 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 2k
SYMBOL Opamps\\LT1014 -80 224 R0
SYMATTR InstName U3
SYMBOL res -128 176 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL res -16 176 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R7
SYMATTR Value 9k
TEXT 12 348 Left 2 !.tran 0 10m 0 1u uic