Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2006-02-14
2006-02-14
Nguyen, Duc M. (Department: 2685)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S326000, C455S333000, C455S324000, C455S302000, C455S304000
Reexamination Certificate
active
06999746
ABSTRACT:
An image rejection mixer of reduced power dissipation includes a signal distributor supplied with local signals having a phase difference to distribute the local signals, a first and a second signal mixer for mixing the distributed local signals and RF signals having a phase difference and outputting respective IF current signals, a phase shifter for shifting in phase the respective mixed IF current signals so as to provide them with a relative phase difference of 90 degrees, and a signal adder for adding the respective phase shifted intermediate frequency current signals. The shifter shifts the phases of the respective IF current signals outputted from the first and the second signal mixers.
REFERENCES:
patent: 4677692 (1987-06-01), Sakashita et al.
patent: 4725767 (1988-02-01), Mori
patent: 5303417 (1994-04-01), Laws
patent: 5339462 (1994-08-01), Staudinger et al.
patent: 5369790 (1994-11-01), Yokota
patent: 5708399 (1998-01-01), Fujii et al.
patent: 6029059 (2000-02-01), Bojer
patent: 6073001 (2000-06-01), Sokoler
patent: 6226509 (2001-05-01), Mole et al.
patent: 6597899 (2003-07-01), Souetinov et al.
patent: 6687494 (2004-02-01), Mourant
patent: 0434203 (1991-06-01), None
patent: 0763885 (1997-03-01), None
patent: 000849873 (1997-11-01), None
patent: 0877476 (1998-11-01), None
patent: 001024590 (2000-08-01), None
patent: 62-278813 (1987-12-01), None
patent: 5-191153 (1993-07-01), None
patent: 6-204752 (1994-07-01), None
patent: 8-130416 (1996-05-01), None
patent: 10-190359 (1998-07-01), None
patent: 11-234046 (1999-08-01), None
patent: 11-261373 (1999-09-01), None
NEC Compound Semiconductor Devices Ltd.
Nguyen Duc M.
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