Version 4
SHEET 1 1336 836
WIRE -496 32 -592 32
WIRE -336 32 -496 32
WIRE -32 32 -336 32
WIRE -592 48 -592 32
WIRE -336 64 -336 32
WIRE -16 96 -160 96
WIRE 80 96 64 96
WIRE -496 128 -496 32
WIRE -464 128 -496 128
WIRE -592 144 -592 128
WIRE -32 176 -32 32
WIRE -160 192 -160 96
WIRE -160 192 -208 192
WIRE -64 192 -160 192
WIRE -160 208 -160 192
WIRE 80 208 80 96
WIRE 80 208 0 208
WIRE 160 208 80 208
WIRE 272 208 160 208
WIRE -64 224 -80 224
WIRE 160 224 160 208
WIRE 272 224 272 208
WIRE -32 256 -32 240
WIRE -560 272 -576 272
WIRE -464 272 -480 272
WIRE -160 304 -160 288
WIRE -80 304 -80 224
WIRE 160 320 160 288
WIRE 272 320 272 304
WIRE -336 352 -336 336
WIRE -80 400 -80 384
FLAG -592 144 0
FLAG 160 320 0
FLAG 272 320 0
FLAG -592 32 IN
FLAG 272 208 OUT1
FLAG -336 352 0
FLAG -32 256 0
FLAG -160 304 0
FLAG -80 400 0
FLAG -576 272 0
SYMBOL voltage -592 32 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL cap 144 224 R0
SYMATTR InstName C1
SYMATTR Value 0.22µ
SYMBOL res 256 208 R0
SYMATTR InstName Rload1
SYMATTR Value 512
SYMBOL opamps\\LT1028 -32 144 R0
SYMATTR InstName U1
SYMBOL res 80 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL res -144 304 R180
WINDOW 0 -39 70 Left 2
WINDOW 3 -49 33 Left 2
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL voltage -80 288 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 1
SYMBOL LTC2920-1 -336 192 R0
SYMATTR InstName U2
SYMBOL res -464 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 60.4K
TEXT 64 384 Left 2 !.tran 0.4m startup