Coded data generation or conversion – Analog to or from digital conversion – Nonlinear
Reexamination Certificate
2006-09-12
2006-09-12
Jeanglaude, Jean Bruner (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Nonlinear
C341S131000, C375S345000, C455S321000
Reexamination Certificate
active
07106232
ABSTRACT:
A diversity receiver circuit system (10) including a primary channel (20) and a diversity channel (22), where analog input signals are converted to differential signals in both channels (20, 22). The receiver circuit system (10) includes a multiplexer (14) and a variable gain amplifier (12) formed on a single RF integrated circuit chip (16), where the multiplexer (14) is positioned before the amplifier (12). The differential signals in the primary channel (20) and the diversity channel (22) are applied to an amplified path (72, 78) and a non-amplified path (76, 82) in the multiplexer (14). A control signal selects one of the amplified primary channel signal, the non-amplified primary channel signal, the amplified diversity channel signal or the non-amplified diversity channel signal. The selected signal is then applied to a first amplifier stage (88) and a second amplifier stage (96) in the variable gain amplifier (12), where both amplifier stages (88, 96) include an amplified path (90, 98) and a non-amplified path (92, 100).
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Gannon David L.
Goyette William R.
Harberts Harry S.
Johnston Robert E.
Phan Colin S.
Jeanglaude Jean Bruner
Miller John A.
Northrop Grumman Corporation
Warn, Hoffmann, Miller & LaLone, P.C.
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