Version 4
SHEET 1 880 680
WIRE 128 16 -32 16
WIRE 544 16 192 16
WIRE 416 80 272 80
WIRE 272 144 272 80
WIRE -352 192 -528 192
WIRE -224 192 -272 192
WIRE -160 192 -224 192
WIRE -32 192 -32 16
WIRE -32 192 -80 192
WIRE 16 192 -32 192
WIRE 144 192 96 192
WIRE 208 192 144 192
WIRE 416 192 416 160
WIRE -528 272 -528 192
WIRE -224 272 -224 192
WIRE 144 272 144 192
WIRE 272 272 272 240
WIRE 544 272 544 16
WIRE 544 272 272 272
WIRE 624 272 544 272
WIRE 272 288 272 272
WIRE -528 400 -528 352
WIRE -224 416 -224 336
WIRE 144 416 144 336
WIRE 272 416 272 368
FLAG 272 416 0
FLAG 144 416 0
FLAG 416 192 0
FLAG -528 400 0
FLAG 624 272 output
IOPIN 624 272 Out
FLAG -224 416 0
SYMBOL npn 208 144 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL res 256 272 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 112 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res -64 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL cap 128 272 R0
SYMATTR InstName C1
SYMATTR Value 0.68nf
SYMBOL cap 192 0 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 30nf
SYMBOL Misc\\battery 416 64 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 3.3
SYMBOL Misc\\signal -528 256 R0
WINDOW 123 24 132 Left 2
WINDOW 39 0 0 Left 0
SYMATTR Value2 AC 1.0 0
SYMATTR InstName V2
SYMATTR Value SINE(1.65 0.5 1k)
SYMBOL res -256 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL cap -240 272 R0
SYMATTR InstName C3
SYMATTR Value 10nf
TEXT 600 320 Left 2 !;tran .01
TEXT 464 352 Left 2 !.ac dec 50 1000 100000