Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Reexamination Certificate
2010-08-31
2011-11-08
Chen, Junpeng (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
C455S326000, C455S333000, C327S530000, C327S306000, C327S315000, C327S324000, C327S327000, C348S731000
Reexamination Certificate
active
08055223
ABSTRACT:
A radio receiver includes a down-converter110for receiving a radio multiplexed signal containing a first signal and a second signal, multiplying the first signal and the second signal by a mixer104to thereby down-convert the radio multiplexed signal and generate an intermediate frequency signal5e. The mixer104has a control section for controlling an operating bias of the mixer104in response to a signal strength of at least either one of the first signal or the second signal. Thus, the dynamic range of the mixer can be widened so that stable image characteristics can be obtained over a wide range of transmission distance.
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Handa Shinichi
Sato Keisuke
Suematsu Eiji
Yamada Atsushi
Birch & Stewart Kolasch & Birch, LLP
Chen Junpeng
Sharp Kabushiki Kaisha
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