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Wireless mobile communication device having a speaker vibration alert and method of using same

  • US 7,245,891 B2
  • Filed: 10/21/2003
  • Issued: 07/17/2007
  • Est. Priority Date: 10/21/2003
  • Status: Expired due to Fees
First Claim
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1. A mobile wireless communication device having a vibration alert, the mobile wireless communication device comprising:

  • a housing;

    a speaker attached to the housing, the speaker selected from a plurality of different speakers, wherein each speaker is constructed to vibrate at a different mechanical vibration resonant frequency;

    sweep circuitry configured to produce a sweeping signal for the plurality of different speakers;

    drive circuitry responsive to the sweeping signal, the drive circuitry coupled to the sweep circuitry and to the speaker and configured to drive each of the plurality of different speakers at a sweeping frequency that causes each of the speakers to vibrate; and

    control circuitry selectively activating the sweep circuitry.

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