Radio receiver, radio communication system and electronic...

Details Radio receiver, radio communication system and electronic... Radio receiver, radio communication system and electronic...

2008-06-24

2008-06-24

Nguyen, Simon (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

C455S003020, C455S314000, C455S323000, C455S334000

Reexamination Certificate

active

07392024

ABSTRACT:
According to the radio receiver, a first path P1included in a frequency conversion circuit12does not have a filter, and a filter171for extracting a reference signal74cis provided in a second path P2so that a second IF multiple signal74and the reference signal74care multiplied together in a mixer section12a. Consequently, by extracting the reference signal74c, the filter171in the second path P2operates as a local oscillation signal source synchronized with the second IF multiple signal74. Therefore, according to the signal obtained by down-conversion of the second IF multiple signal74with use of the reference signal74cin the mixer section12a, signals identical in quality to input signals inputted on the transmission side can be reproduced.

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