Version 4
SHEET 1 880 680
WIRE 48 -368 -48 -368
WIRE -48 -336 -48 -368
WIRE 48 -304 48 -368
WIRE -96 -176 -384 -176
WIRE 48 -176 48 -224
WIRE 48 -176 -16 -176
WIRE 112 -176 48 -176
WIRE 352 -144 256 -144
WIRE 576 -144 352 -144
WIRE -160 -112 -224 -112
WIRE 48 -112 -80 -112
WIRE 112 -112 48 -112
WIRE 48 -80 48 -112
WIRE 48 48 48 0
WIRE 352 48 352 -144
WIRE 352 48 48 48
WIRE -224 64 -224 -112
WIRE -224 64 -384 64
WIRE 48 80 -48 80
WIRE -48 112 -48 80
WIRE 48 144 48 80
WIRE -224 272 -224 64
WIRE -96 272 -224 272
WIRE 48 272 48 224
WIRE 48 272 -16 272
WIRE 112 272 48 272
WIRE 352 304 256 304
WIRE 576 304 352 304
WIRE -320 336 -384 336
WIRE -160 336 -320 336
WIRE 48 336 -80 336
WIRE 112 336 48 336
WIRE 48 368 48 336
WIRE -320 448 -320 336
WIRE 48 496 48 448
WIRE 352 496 352 304
WIRE 352 496 48 496
FLAG -320 448 0
FLAG -48 -336 0
FLAG 144 -64 0
FLAG -48 112 0
FLAG 144 384 0
SYMBOL Opamps\\LT1637 144 -144 R0
SYMATTR InstName U1
SYMBOL res 0 -160 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMBOL res 32 -320 R0
SYMATTR InstName R2
SYMBOL res 32 -96 R0
SYMATTR InstName R3
SYMBOL res -64 -128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMBOL Opamps\\LT1637 144 304 R0
SYMATTR InstName U2
SYMBOL res 0 288 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R5
SYMBOL res 32 128 R0
SYMATTR InstName R6
SYMBOL res 32 352 R0
SYMATTR InstName R7
SYMBOL res -64 320 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8