Vehicle-Mounted Noise Filter
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United States of America Patent
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N/A
Issued Date -
Apr 5, 2012
app pub date -
May 18, 2010
filing date -
May 29, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed is a vehicle-mounted noise filter capable of suppressing electric field coupling between a pair of capacitors in the FM radio band, thereby allowing the intrinsic noise attenuation performance of a noise filter circuit to be exerted even in the FM radio band. The vehicle-mounted noise filter comprises a ground plate, a coil, a pair of capacitors, and a conductive shielding plate. The ground plate is grounded in a vehicle body. A lead wire is wound around the coil. The pair of capacitors are disposed such that the coil is interposed therebetween, and are electrically connected to the coil and the ground plate so as to form π-type filter circuit. The conductive shielding plate is grounded in the ground plate and is disposed between the pair of capacitors so as to shield the electric field coupling between the pair of capacitors.
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