| 摘要 |
PROBLEM TO BE SOLVED: To provide an electromagnetic noise eliminator that can be easily retrofitted to an existing microphone. SOLUTION: An electromagnetic noise eliminator 20 is attached to a side of a connector base 11 facing out of a microphone case by means of first to third pins E, SH, SC embedded in the connector base 11. The electromagnetic noise eliminator 20 generates capacitors by means of solid patterns 23-25 formed on both sides of a printed board 21, and generates inductances to the first to third pins by means of magnetic sheets 31, 32 arranged on both sides with the printed board 21 in between. The capacitors and the inductances equivalently insert T filters in the second and third pins SH, SC contributing to signal transmission to effectively prevent noise components from intruding into an electronic circuit including an impedance converter within a microphone. COPYRIGHT: (C)2012,JPO&INPIT |
