Telecommunications – Transmitter and receiver at same station – With frequency stabilization
Reexamination Certificate
2011-03-22
2011-03-22
Nguyen, Lee (Department: 2618)
Telecommunications
Transmitter and receiver at same station
With frequency stabilization
C455S260000, C455S552100, C370S336000
Reexamination Certificate
active
07912428
ABSTRACT:
A system and method providing variable-frequency IF conversion in a multimode communication device. Various aspects of the present invention provide a multimode communication device comprising at least one RF signal receiver adapted to receive at least a first RF signal corresponding to a first communication protocol and a second RF signal corresponding to a second communication protocol. A controllable frequency source may, for example, be adapted to output a mixing signal characterized by one of a plurality of selectable frequencies. Such selectable frequencies may, for example, comprise a first frequency corresponding to the first communication protocol and a second frequency corresponding to the second communication protocol. A mixer may, for example, receive a received RF signal from the RF signal receiver, receive a mixing signal from the controllable frequency source, and convert the received RF signal to an IF signal utilizing the received mixing signal.
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Manku T et al; “A Single Chip Direct Conversion CMOS Transceiver for Quad-Band GSM/GPRS/EDGE and WLAN with integrated VCO's and fractional-N Synthesizer”; Radio Frequency Integrated Circuits (RFIC) Symposium, 2004. Digest of Papers, Jun. 6, 2004-Jun. 8, 2004; pp. 423-426; XP010713596 IEEE; Piscataway, NJ, USA.
Behzad Arya
Rofougaran Ahmadreza
Broadcom Corporation
McAndrews Held & Malloy Ltd.
Nguyen Lee
LandOfFree
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