Version 4
SHEET 1 1156 680
WIRE 48 64 -32 64
WIRE 144 64 48 64
WIRE 208 64 144 64
WIRE 256 64 208 64
WIRE 416 64 336 64
WIRE 544 64 416 64
WIRE 416 80 416 64
WIRE 544 80 544 64
WIRE -336 144 -336 128
WIRE -208 144 -336 144
WIRE -32 144 -32 64
WIRE 48 144 48 64
WIRE 144 160 144 64
WIRE -336 176 -336 144
WIRE -208 176 -208 144
WIRE 208 176 208 64
WIRE 256 176 208 176
WIRE 512 192 320 192
WIRE 544 192 544 160
WIRE 544 192 512 192
WIRE 256 208 224 208
WIRE -32 272 -32 224
WIRE 48 272 48 224
WIRE 48 272 -32 272
WIRE 144 272 144 224
WIRE 144 272 48 272
WIRE -32 304 -32 272
WIRE 224 304 224 208
FLAG -32 304 0
FLAG 224 304 0
FLAG -208 176 0
FLAG -336 48 V+
FLAG -336 256 V-
FLAG 288 224 V-
FLAG 288 160 V+
FLAG 512 192 OUT
FLAG 416 160 0
SYMBOL current -32 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName I1
SYMATTR Value 0
SYMBOL res 32 128 R0
SYMATTR InstName R1
SYMATTR Value 5G
SYMBOL cap 128 160 R0
SYMATTR InstName C1
SYMATTR Value 72p
SYMBOL res 352 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10Meg
SYMBOL voltage -336 32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -336 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL res 560 176 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL res 432 176 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R4
SYMATTR Value {RVAR}
SYMBOL Opamps\\opamp2 288 128 R0
SYMATTR InstName U1
SYMATTR Value AD8616
TEXT -368 328 Left 2 !.dc dec I1 10f 100n
TEXT -368 368 Left 2 !.include ad8616.cir
TEXT -368 408 Left 2 !.step param RVAR list 0.1k, 1k, 10k