Version 4
SHEET 1 920 680
WIRE 208 -560 -160 -560
WIRE 432 -528 352 -528
WIRE 560 -528 432 -528
WIRE 864 -528 560 -528
WIRE -160 -496 -160 -560
WIRE 64 -496 32 -496
WIRE 208 -496 144 -496
WIRE 864 -496 864 -528
WIRE 560 -384 560 -528
WIRE 864 -384 864 -432
WIRE 32 -272 32 -496
WIRE 432 -272 432 -528
WIRE 432 -272 32 -272
WIRE 560 -272 560 -304
WIRE 864 -272 864 -304
WIRE 864 -272 560 -272
WIRE -608 -256 -608 -288
WIRE -448 -256 -448 -288
WIRE -160 -240 -160 -416
WIRE 560 -240 560 -272
WIRE -608 -128 -608 -176
WIRE -448 -128 -448 -176
WIRE -160 -112 -160 -160
WIRE 560 -112 560 -160
WIRE 560 -112 -160 -112
FLAG -448 -128 0
FLAG -608 -128 0
FLAG -448 -288 -15V
FLAG -608 -288 +15V
FLAG 240 -608 -15V
FLAG 240 -448 +15V
SYMBOL Opamps\\LT1210 240 -528 M180
SYMATTR InstName U1
SYMBOL voltage -608 -272 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage -448 -160 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL res 544 -400 R0
SYMATTR InstName R4
SYMATTR Value 100
SYMBOL res 544 -256 R0
SYMATTR InstName R5
SYMATTR Value 10
SYMBOL res 848 -400 R0
SYMATTR InstName R6
SYMATTR Value 50
SYMBOL res -176 -256 R0
SYMATTR InstName R2
SYMATTR Value 50
SYMBOL res -176 -512 R0
SYMATTR InstName R1
SYMATTR Value 50
SYMBOL res 160 -512 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 2.5k
SYMBOL diode 848 -496 R0
SYMATTR InstName D1
SYMBOL res -288 -576 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R_ltg
SYMATTR Value 50