Version 4
SHEET 1 4472 1028
WIRE -2176 -832 -2176 -848
WIRE -2048 -832 -2048 -848
WIRE -2176 -736 -2176 -752
WIRE -2048 -736 -2048 -752
WIRE -2464 -608 -2528 -608
WIRE -2336 -608 -2400 -608
WIRE -2848 -512 -2944 -512
WIRE -2528 -512 -2528 -608
WIRE -2528 -512 -2784 -512
WIRE -2464 -512 -2528 -512
WIRE -2336 -512 -2336 -608
WIRE -2336 -512 -2384 -512
WIRE -2944 -368 -2944 -512
WIRE -2528 -352 -2528 -512
WIRE -2512 -352 -2528 -352
WIRE -2336 -320 -2336 -512
WIRE -2336 -320 -2368 -320
WIRE -2304 -320 -2336 -320
WIRE -2512 -288 -2544 -288
WIRE -2944 -208 -2944 -288
FLAG -2176 -736 0
FLAG -2048 -736 0
FLAG -2176 -848 +V
FLAG -2048 -848 -V
FLAG -2544 -288 0
FLAG -2304 -320 Out
FLAG -2480 -400 +V
FLAG -2432 -240 +V
FLAG -2480 -240 -V
FLAG -2944 -208 0
SYMBOL voltage -2176 -848 R0
SYMATTR InstName V1
SYMATTR Value 2.5
SYMBOL voltage -2048 -848 R0
SYMATTR InstName V2
SYMATTR Value -2.5
SYMBOL res -2368 -528 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 1Meg
SYMBOL LTC6268 -2480 -320 R0
SYMATTR InstName U1
SYMBOL cap -2400 -624 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName Cparasitic
SYMATTR Value 150f
SYMBOL diode -2784 -528 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL voltage -2944 -384 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value PULSE(0 3m 0 1n 1n 1u 2u)
TEXT -2696 -800 Bottom 2 ;Trans-Impedance Amplifier
TEXT -2280 -200 Left 2 !.tran 2u