Audio equipment and control method of audio equipment

Details Audio equipment and control method of audio equipment Audio equipment and control method of audio equipment

2006-09-19

2006-09-19

Vuong, Quochien B. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S552100, C455S234100, C455S232100

Reexamination Certificate

active

07110737

ABSTRACT:
Audio equipment and a method of controlling audio equipment include a switching power amplifier circuit and a controller controlling a switching frequency of the power amplifier circuit. The controller varies the switching frequency of the power amplifier circuit in accordance with a receiving frequency in a case of receiving at least a medium-wave broadcast wave.

REFERENCES:
patent: 6084450 (2000-07-01), Smith et al.
patent: 6148220 (2000-11-01), Sharp et al.
patent: 6563377 (2003-05-01), Butler
patent: 6819912 (2004-11-01), Roeckner et al.

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