Version 4
SHEET 1 1756 828
WIRE 96 32 96 16
WIRE -608 64 -608 48
WIRE -512 64 -512 48
WIRE -176 64 -304 64
WIRE -304 96 -304 64
WIRE -352 112 -416 112
WIRE 272 112 240 112
WIRE 288 112 272 112
WIRE 384 112 368 112
WIRE -176 128 -240 128
WIRE 528 144 464 144
WIRE -608 160 -608 144
WIRE -512 160 -512 144
WIRE -352 160 -368 160
WIRE 240 160 240 112
WIRE 240 160 192 160
WIRE 464 160 464 144
WIRE 272 176 272 112
WIRE 416 176 272 176
WIRE -304 192 -304 176
WIRE -304 192 -336 192
WIRE -176 192 -192 192
WIRE -304 208 -304 192
WIRE -416 224 -416 112
WIRE -352 224 -416 224
WIRE 240 224 192 224
WIRE 416 224 272 224
WIRE -240 256 -240 128
WIRE -176 256 -240 256
WIRE 464 256 464 240
WIRE -352 272 -368 272
WIRE 208 288 192 288
WIRE 240 288 240 224
WIRE 272 288 272 224
WIRE 272 288 240 288
WIRE 288 288 272 288
WIRE 384 288 368 288
WIRE -416 304 -416 224
WIRE -304 320 -304 288
WIRE -176 320 -304 320
WIRE 96 368 96 352
WIRE -416 400 -416 384
FLAG -608 160 0
FLAG -512 160 0
FLAG 208 288 0
FLAG -608 48 +V
FLAG -336 192 0
FLAG -368 160 0
FLAG -368 272 0
FLAG -416 400 0
FLAG 464 256 0
FLAG 528 144 OUT
FLAG 384 112 0
FLAG 384 288 0
FLAG -512 48 -V
FLAG -192 192 +V
FLAG 96 16 +V
FLAG 96 368 -V
SYMBOL voltage -608 48 R0
WINDOW 123 24 138 Left 2
WINDOW 39 24 117 Left 2
SYMATTR InstName V1
SYMATTR Value 1.5
SYMBOL voltage -512 48 R0
WINDOW 123 24 138 Left 2
WINDOW 39 24 117 Left 2
SYMATTR InstName V2
SYMATTR Value -1.5
SYMBOL e -304 80 R0
SYMATTR InstName E1
SYMATTR Value .5
SYMBOL e -304 192 R0
SYMATTR InstName E2
SYMATTR Value .5
SYMBOL e2 464 144 R0
SYMATTR InstName E3
SYMATTR Value 1
SYMBOL res 384 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 300
SYMBOL res 384 272 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 300
SYMBOL LTC6605-10 16 192 R0
SYMATTR InstName U1
SYMBOL voltage -416 288 R0
SYMATTR InstName V3
SYMATTR Value AC 1
TEXT 208 536 Left 2 !.ac oct 20 100K 100Meg
TEXT 200 352 Left 2 !.measure pt1 find V(out) at 5Meg\n.measure pt2 find V(out) at 7.5Meg\n.measure pt3 find V(out) at 10Meg\n.measure pt4 find V(out) at 20Meg\n.measure pt5 find V(out) at 50Meg