Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Reexamination Certificate
2005-04-04
2009-08-18
Nguyen, Tony T (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
C455S161200, C455S575100, C455S434000
Reexamination Certificate
active
07577410
ABSTRACT:
An audio apparatus is provided that permits selection of either analog or digital audio signals in execution of a scan operation. A radio receiver300comprises a tuner320capable of receiving carrier wave signals including at least an analog audio signal and a digital audio signal, a microcomputer380for controlling the tuner to search for a receivable broadcast station in sequence, and to receive the carrier wave signal from the broadcast station searched for during a certain period of time, a switch350for selecting one audio signal from the analog audio signal and the digital audio signal sent from the tuner320during the scan operation, and a speaker390for reproducing the audio signal selected by the switch350.
REFERENCES:
patent: 6591100 (2003-07-01), Dent
patent: 7194753 (2007-03-01), Fries et al.
patent: 2002-300057 (2002-10-01), None
patent: 2003-046883 (2003-02-01), None
patent: 2003-229778 (2003-08-01), None
Alpine Electronics Inc.
Brinks Hofer Gilson & Lione
Nguyen Tony T
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