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Mobile wireless communications device having improved RF immunity of audio transducers to electromagnetic interference (EMI)

  • US 8,099,142 B2
  • Filed: 03/28/2011
  • Issued: 01/17/2012
  • Est. Priority Date: 04/04/2005
  • Status: Active Grant
First Claim
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1. A mobile wireless communications device comprising:

  • a housing;

    at least one circuit board carried by the housing;

    radio frequency (RF) circuitry and a processor operative therewith and carried by said at least circuit board;

    an audio transducer assembly carried by said at least one circuit board and comprising an audio transducer, a transducer housing for said audio transducer, and at least one electrical contact pad member on said transducer housing and coupled to said audio transducer;

    audio circuitry comprising at least one signal trace on said at least one circuit board and engaging said electrical contact pad member;

    at least one first filter coupled with said at least one signal trace; and

    at least one second filter mounted at said electrical contact pad member.

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