Pulse or digital communications – Receivers – Automatic gain control
Reexamination Certificate
2006-11-28
2006-11-28
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Receivers
Automatic gain control
C375S211000, C375S213000, C375S220000, C375S224000
Reexamination Certificate
active
07142619
ABSTRACT:
Systems and methods are described for long subscriber loops using automatic gain control. A method includes extending a digital subscriber loop including: producing an output signal in a first direction from a variable gain amplifier at a mid-span extender unit responsive to an input signal in the first direction from the digital subscriber loop; monitoring a signal strength of said output signal in the first direction at the mid-span extender unit; generating a gain control signal responsive to the signal strength at the mid-span extender unit; controlling a gain of the variable gain amplifier at the mid-span extender unit responsive to the gain control signal; and controlling a second gain of a second variable gain amplifier at said mid-span extender unit responsive to said gain control signal to produce an output signal in a second direction from said second variable gain amplifier at said mid-span extender unit responsive to a second input signal in said second direction from said digital subscriber loop.
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Bogardus Gary
Kraba Kamila
Shenoi Kishan
Sommer Jeremy
Squadrito Sandro
Bruckner PC John
Fan Chieh M.
Symmetricom, Inc.
Wang Ted M.
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