Pulse or digital communications – Receivers – Automatic gain control
Patent
1997-03-20
1999-04-06
Chin, Stephen
Pulse or digital communications
Receivers
Automatic gain control
375316, 375318, 330282, 330 86, H04L 2708
Patent
active
058928006
ABSTRACT:
A pre-amplifier circuit, which may be used in a variety of data recovery circuits to accurately recover data transmissions, includes an input regulatory circuit, a feedback circuit, and an amplifier. The input regulatory circuit regulates the magnitude of the data signal provided to the amplifier based on feedback signals from a feedback circuit. For low level data signals, the input regulatory circuit provides a full, or almost full, representation of the data signal to the amplifier for amplification. But, when the data signal levels increase, the input regulatory circuit attenuates, based on the feedback signals, the data signals more and more before providing them to the amplifier, such that the output of the amplifier stays within a certain range.
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Jackson H. Spence
Rokhsaz Shahriar
Rybicki Mathew A.
Chin Stephen
Ghayour Mohammad
Markison Timothy W
Sigmatel, Inc.
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