Method and system for auto detecting and auto switching...

Details Method and system for auto detecting and auto switching... Method and system for auto detecting and auto switching...

2011-03-29

2011-03-29

Tran, Tuan A (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

With wave collector

C455S067110, C455S067140, C455S078000, C455S081000, C455S557000, C455S575100, C455S575700, C455S344000, C455S349000, C324S527000, C343S724000, C343S725000

Reexamination Certificate

active

07917115

ABSTRACT:
Methods and systems for auto detecting and auto switching antennas in a multi-antenna FM transmit/receive system are disclosed and may include detecting when an external antenna may be coupled to an external port of the wireless device and utilizing the external antenna for transmitting and/or receiving FM signals. The decoupling of an external antenna from an external port may be detected, which may cause the FM radio transmitter/receiver to be configured to transmit and/or receive FM signals utilizing antennas internal to the wireless device. One or more test signals, which may include AC signals, may be generated within the chip for detecting whether an external antenna may be coupled to an external port. A reflected signal from an external port may be measured and compared to a prestored value corresponding to a reflection due to an open circuit at the one or more external ports of the wireless device.

REFERENCES:
patent: 6853197 (2005-02-01), McFarland et al.
patent: 7242917 (2007-07-01), Abbasi et al.
patent: 2005/0057404 (2005-03-01), Demicco et al.
patent: 2008/0096484 (2008-04-01), Tuttle et al.

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