Version 4
SHEET 1 880 680
WIRE 288 16 16 16
WIRE 16 48 16 16
WIRE -112 144 -224 144
WIRE 16 144 16 128
WIRE 16 144 -48 144
WIRE 288 144 288 16
WIRE -224 160 -224 144
WIRE 16 208 16 144
WIRE -224 288 -224 240
WIRE 16 288 -224 288
WIRE 288 288 288 224
WIRE 288 288 16 288
WIRE 16 304 16 288
FLAG 16 304 0
SYMBOL res 0 192 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res 0 32 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL cap -48 128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 680n
SYMBOL voltage 288 128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 3.3
SYMBOL voltage -224 144 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 1 500)
TEXT -208 40 Left 2 !.tran 10m