Telecommunications – Receiver or analog modulated signal frequency converter – Noise or interference elimination
Reexamination Certificate
2005-05-09
2009-11-24
Vuong, Quochien B (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Noise or interference elimination
C455S333000, C455S339000, C375S350000
Reexamination Certificate
active
07623837
ABSTRACT:
A heterodyne receiving circuit for a digital communication system including a first band pass filter receiving a signal from an antenna, an amplifying circuit and a second narrow band pass filter for selecting one particular channel within a band of frequencies. The two filters are carried out with integrated BAW-type tunable resonators which can be adjusted, respectively, by a first electrical signal and a second electrical signal generated by two PLL-type frequency control loops. The second frequency control loop has a variable division factor for the purpose of selecting one particular channel within said band of frequencies. In addition, the receiving circuit includes a mixer for mixing the signal generated at the output of said second filter with a local oscillation frequency in order to produce an intermediate frequency. The division factor is controlled by a digital processing of the intermediate frequency.
REFERENCES:
patent: 5963856 (1999-10-01), Kim
patent: 6112070 (2000-08-01), Katsuyama et al.
patent: 6542724 (2003-04-01), Copeland et al.
patent: 6653913 (2003-11-01), Klee et al.
patent: 6799027 (2004-09-01), Forster
patent: 6952594 (2005-10-01), Hendin
patent: 7194247 (2007-03-01), Tikka et al.
patent: 2864729 (2005-07-01), None
Pärssinen, Aarno,Direct Conversion Receivers in Wide-Band Systems, Kluwer Academic Publishers, Dordrecht, The Netherlands, 2001.
De Los Santos, Héctor J.,RF MEMS Circuit Design for Wireless Communications, Artech House, Boston, Massachusetts, 2002, p. 163.
Belot Didier
Cathelin Andreia
Jorgenson Lisa K.
Ringer Eric M.
Seed IP Law Group PLLC
STMicroelectronics S.A.
Vuong Quochien B
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