Version 4
SHEET 1 1128 680
WIRE 0 -112 -160 -112
WIRE 224 -112 0 -112
WIRE 352 -112 224 -112
WIRE 496 -112 352 -112
WIRE -160 -64 -160 -112
WIRE 224 -64 224 -112
WIRE -368 -32 -608 -32
WIRE 0 16 0 -112
WIRE 16 16 0 16
WIRE 352 32 352 -112
WIRE 368 32 352 32
WIRE 0 48 0 16
WIRE 16 48 16 16
WIRE -368 64 -368 -32
WIRE -160 64 -160 16
WIRE -160 64 -288 64
WIRE -32 64 -160 64
WIRE 352 64 352 32
WIRE 368 64 368 32
WIRE 64 80 32 80
WIRE 96 80 64 80
WIRE 224 80 224 16
WIRE 224 80 160 80
WIRE 320 80 224 80
WIRE -64 96 -288 96
WIRE -32 96 -64 96
WIRE 432 96 384 96
WIRE 448 96 432 96
WIRE 624 96 512 96
WIRE 320 112 288 112
WIRE -160 128 -160 64
WIRE 0 128 0 112
WIRE 224 144 224 80
WIRE -608 160 -608 128
WIRE -368 160 -368 96
WIRE -368 160 -608 160
WIRE 288 160 288 112
WIRE 432 160 432 96
WIRE 432 160 288 160
WIRE 624 176 624 96
WIRE -64 192 -64 96
WIRE 64 192 64 80
WIRE 64 192 16 192
WIRE -160 224 -160 208
WIRE 624 288 624 256
WIRE 224 304 224 224
WIRE 352 304 352 128
FLAG 352 304 0
FLAG 0 128 0
FLAG 224 304 0
FLAG -160 224 0
FLAG 624 288 0
FLAG 496 -32 0
SYMBOL voltage 496 -128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 6.5
SYMBOL cap 448 112 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C4
SYMATTR Value 2.2µ
SYMBOL cap 96 96 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C5
SYMATTR Value 2.2µ
SYMBOL OPA847 352 32 R0
SYMATTR InstName U1
SYMBOL OPA847 0 16 R0
SYMATTR InstName U2
SYMBOL res -272 48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 -20 15 VTop 2
SYMATTR InstName R1
SYMATTR Value 2.2k
SYMBOL res -272 80 R90
WINDOW 0 67 69 VBottom 2
WINDOW 3 40 27 VTop 2
SYMATTR InstName R2
SYMATTR Value 2.2k
SYMBOL res 32 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 2.2k
SYMBOL res -144 32 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R4
SYMATTR Value 4.7k
SYMBOL res 208 -80 R0
SYMATTR InstName R5
SYMATTR Value 4.7k
SYMBOL res 208 128 R0
SYMATTR InstName R6
SYMATTR Value 4.7k
SYMBOL voltage -608 32 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value2 AC 100m 0
SYMATTR InstName V2
SYMATTR Value SINE(0 100m 125k)
SYMBOL res -624 -48 R0
SYMATTR InstName R7
SYMATTR Value 50
SYMBOL res -176 112 R0
SYMATTR InstName R8
SYMATTR Value 4.7k
SYMBOL res 608 160 R0
SYMATTR InstName R9
SYMATTR Value 10k
TEXT 176 -96 Left 2 !;ac lin 500 1k 1000k
TEXT 680 -80 Left 2 !.tran 0 1m 0 100n