Patent ID: 6643503
Filing Date: 2003-11-04
Classification: H04S

Abstract:
A wireless speaker apparatus for a radio communication device, comprising:a remote housing; a receiver disposed within the housing, the receiver operable to receive at least two modulated signals carrying audio information on respective first and second frequencies from the radio communication device; an adjustable tunable filter circuit coupled with the receiver, the tunable filter circuit provides a low side frequency response slope near the first frequency such that filter circuit is operable to slope demodulate the first frequency to provide a first amplitude modulated output signal, and the tunable filter circuit provides a high side frequency response slope near the second frequency such that filter circuit is operable to slope demodulate the second frequency to provide a second amplitude modulated output signal; and a control signal applied to the tunable filter circuit, the control signal tunes a center frequency of the tunable filter circuit to substantially center one of the low side frequency response slope or high side frequency response slope at the respective first or second frequency while decentering the other frequency response slope from its respective first or second frequency so as to favor demodulation of the one of the carrier frequencies while suppressing the other carrier frequency; and an audio back end coupled to the tunable filter circuit, the audio back end converts the amplitude modulated output signals to audio signals for output to a user.