Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2011-06-28
2011-06-28
Nguyen, Duc M (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S323000, C455S132000, C455S553100, C455S076000, C342S386000
Reexamination Certificate
active
07970372
ABSTRACT:
A mixer mixes respective signals of L1, L2C, and L5-E5a with a local oscillation signal where the frequency of the L1 signal has an image relationship with the frequencies of the L2C and L5-E5a signals to conduct frequency conversion. An image removal mixer mixes the respective position signals of 1stIF with a local oscillation signal where the frequency of the L1 signal of the 1stIF has an image relationship with the frequencies of the L2C signal and the L5-E5a signal of 1stIF to conduct frequency conversion. The image removal mixer then outputs the L1 signal of 2ndIF and the L2C and L5-E5a signals of 2ndIF, independently. A branching filter separates the L2C and L5-E5a signals of 2ndIF from each other, and outputs the separated signals.
REFERENCES:
patent: 5040240 (1991-08-01), Keegan
patent: 6038248 (2000-03-01), Rabaeijs et al.
patent: 6088348 (2000-07-01), Bell et al.
patent: 6356602 (2002-03-01), Rodal et al.
patent: 6675003 (2004-01-01), Dubash et al.
patent: 6694276 (2004-02-01), Farine et al.
patent: 7248212 (2007-07-01), Kato
patent: 7386278 (2008-06-01), Sato
patent: 7551127 (2009-06-01), Dubash et al.
patent: 2004/0259518 (2004-12-01), Aktas et al.
patent: 2005/0080564 (2005-04-01), Tso et al.
patent: 2005/0101248 (2005-05-01), Vollath
patent: 1 783 512 (2007-05-01), None
patent: A-7-128423 (1995-05-01), None
patent: A-10-54871 (1998-02-01), None
Search Report dated Mar. 13, 2008 in corresponding Great Britain Patent Application No. GB 0722573.3.
Examination Report dated on Mar. 31, 2010 issued from the British Patent Office in the corresponding British (GB) patent application No. GB0722573.3.
Hein, et al., “Status of Galileo Frequency and Signal Design” by members of the Galileo Signal Task Force of the European Commission, Brussels, Sep. 25, 2002.
Office Action dated on Sep. 1, 2010 issued from the Chinese Patent Office in corresponding Chinese (CN) patent application No. 200710192775.3 (English translation enclosed).
Denso Corporation
Nguyen Duc M
Posz Law Group , PLC
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