Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2008-06-10
2011-11-22
Nguyen, Simon (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S318000, C455S323000, C455S333000
Reexamination Certificate
active
08064867
ABSTRACT:
A dual-band input transceiver block is formed to operably receive one of a 2.4 GHz radio frequency signal or a 5.0 GHz radio frequency transceiver signal in a manner that minimizes duplication of circuitry and creates a combined circuit path for RF front end input stages for much of the input stage. More specifically, the embodiments of the present invention include separate amplification and mixing stages whose outputs are combined by a stabilized load with circuitry for removing a common mode feedback signal. As such, downstream components, such as amplifiers, filters, analog-to-digital converters, and other input path circuit elements, are not duplicated and may be used regardless of whether the dual-band transceiver is operating in a first or second frequency band. Operation is, in the described embodiment, only one frequency input at a time though the invention is not limited to such operation. More specifically, a first input section is operably coupled to receive a first local oscillation input and a first frequency band signal input. A second input section is coupled to receive a second local oscillation input and a second frequency band signal input. Outputs of the first and second input sections are produced to a stabilized load with a common mode feedback block for removing a common mode feedback signal. As such, an output signal is produced having a regulated DC level and having any common mode feedback signal eliminated there from.
REFERENCES:
patent: 6125268 (2000-09-01), Boesch et al.
patent: 6819914 (2004-11-01), Yan et al.
patent: 6917815 (2005-07-01), Hajimiri et al.
patent: 7155184 (2006-12-01), Kim
patent: 7263344 (2007-08-01), Manku
patent: 7333565 (2008-02-01), Oono et al.
patent: 2002/0147014 (2002-10-01), Atarius et al.
patent: 2004/0259518 (2004-12-01), Aktas et al.
patent: 2007/0111661 (2007-05-01), Bargroff et al.
Darabi Hooman
Li Qiang (Tom)
Broadcom Corporation
Garlick Bruce E.
Garlick & Harrison & Markison
Nguyen Simon
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