Power line noise filter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 23, 2003
Grant Date -
May 30, 2002
app pub date -
Oct 22, 2001
filing date -
Oct 31, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a power line noise filter, a detection circuit detecting variations in electric current in two conductive lines of an electric power line, thereby detecting common mode noise that causes a change in electric current in the power line. A phase-inverted signal generation circuit then generates a phase-inverted signal whose is inverted to that of the noise detected by the detection circuit. Further, an injection circuit causes a change in electric current corresponding to the phase-inverted signal, for the two conductive lines of the electric power line. The common mode noise causing a change in electric current in the electric power lines is thereby canceled.
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