Receiver for an integrated heterodyne communication system...

Telecommunications – Receiver or analog modulated signal frequency converter – Noise or interference elimination

Reexamination Certificate

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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.

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