Version 4
SHEET 1 1384 772
WIRE 16 -240 -112 -240
WIRE -112 -208 -112 -240
WIRE 16 -160 16 -240
WIRE -112 -112 -112 -128
WIRE 16 -80 0 -80
WIRE 144 -80 16 -80
WIRE 240 -80 144 -80
WIRE 144 -64 144 -80
WIRE 240 -64 240 -80
WIRE -704 -32 -752 -32
WIRE -656 -32 -704 -32
WIRE -576 -32 -592 -32
WIRE -480 -32 -496 -32
WIRE -448 -32 -480 -32
WIRE -320 -32 -368 -32
WIRE -304 -32 -320 -32
WIRE -704 16 -704 -32
WIRE -576 16 -576 -32
WIRE -480 16 -480 -32
WIRE -144 16 -144 -32
WIRE -64 16 -64 -32
WIRE 16 16 0 16
WIRE -224 32 -224 -32
WIRE -64 112 -64 80
WIRE -704 128 -704 96
WIRE -576 128 -576 80
WIRE -480 128 -480 80
WIRE -320 128 -320 -32
WIRE -224 128 -224 96
WIRE -144 160 -144 80
WIRE 16 160 16 16
WIRE 16 160 -144 160
WIRE 144 160 16 160
WIRE -320 272 -320 208
WIRE 16 272 16 240
FLAG -320 272 0
FLAG -64 112 0
FLAG -112 -112 0
FLAG 16 272 0
FLAG -224 128 0
FLAG 144 0 0
FLAG 240 0 0
FLAG -704 128 0
FLAG -576 128 0
FLAG -480 128 0
FLAG -752 -32 LPF_IN
IOPIN -752 -32 Out
FLAG 144 160 LPF_OUT
IOPIN 144 160 Out
SYMBOL voltage -320 112 R0
WINDOW 3 32 98 Left 0
WINDOW 123 36 71 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value SINE(5.7 1 1000)
SYMATTR Value2 AC 1
SYMATTR InstName V1
SYMBOL res -128 -48 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R5
SYMATTR Value 33k
SYMBOL res -48 -48 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R6
SYMATTR Value 33k
SYMBOL cap -160 16 R0
SYMATTR InstName C7
SYMATTR Value 1n
SYMBOL npn -64 -80 R0
SYMATTR InstName Q1
SYMBOL cap -80 16 R0
SYMATTR InstName C8
SYMATTR Value 47p
SYMBOL voltage -112 -224 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 10
SYMBOL res 0 144 R0
SYMATTR InstName R7
SYMATTR Value 10k
SYMBOL cap -240 32 R0
SYMATTR InstName C6
SYMATTR Value 220p
SYMBOL res -208 -48 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R4
SYMATTR Value 33k
SYMBOL res -592 -16 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R3
SYMATTR Value 2k2
SYMBOL res -464 -16 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R2
SYMATTR Value 2k2
SYMBOL res -720 0 R0
SYMATTR InstName R11
SYMATTR Value 100k
SYMBOL cap -496 16 R0
SYMATTR InstName C4
SYMATTR Value 2n2
SYMBOL cap -592 16 R0
SYMATTR InstName C5
SYMATTR Value 1n
SYMBOL cap -592 -48 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C3
SYMATTR Value 220n
SYMBOL res 0 -176 R0
SYMATTR InstName R1
SYMATTR Value 680
SYMBOL cap 128 -64 R0
SYMATTR InstName C1
SYMATTR Value 100µ
SYMBOL cap 224 -64 R0
SYMATTR InstName C2
SYMATTR Value 100n
TEXT 56 -256 Left 0 !;tran 0.01
TEXT 48 -216 Left 0 !.ac dec 50 20 1000K