Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2007-03-15
2010-06-22
Trinh, Sonny (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S067110, C455S550100
Reexamination Certificate
active
07742752
ABSTRACT:
An integrated circuit radio transceiver and method therefor includes a parallel resistive circuit that provides high resolution to resistive circuitry in a hardware efficient manner for use in a plurality of applications including active filters requiring a precise bandwidth, voltage sources that require a precise voltage output, and current sources that require a precise current output source. The parallel resistive circuit includes at least one base resistive device, whose resistive value may be selectable, in parallel with a plurality of selectable circuit paths, each having a plurality of series coupled resistive values formed in an approximate location of the integrated circuit to reduce process variations. The paths are selectable by logic to provide a desired operational characteristic.
REFERENCES:
patent: 3972626 (1976-08-01), Laskowsi
patent: 5426386 (1995-06-01), Matthews et al.
patent: 6559714 (2003-05-01), Park et al.
patent: 6791809 (2004-09-01), Pannwitz
patent: 7339357 (2008-03-01), Lopata
patent: 2008/0008337 (2008-01-01), Liu
Broadcom Corporation
Garlick & Harrison & Markison
Harrison James A.
Trinh Sonny
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