Signal adjustment receiver circuitry

Pulse or digital communications – Receivers – Interference or noise reduction

Reexamination Certificate

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Details

C375S229000, C375S232000, C375S316000, C375S345000

Reexamination Certificate

active

07733997

ABSTRACT:
Systems and methods for adjusting a signal received from a communication path are disclosed. A receiver can receive a signal from a communication path which attenuates at least some frequency components of the signal. The receiver can include an equalization block that adjusts at least some of the frequency content of the received signal, a signal normalization block that provides a normalized signal amplitude and/or a normalized edge slope, and a control block. In one embodiment, the control block controls frequency adjustment in the equalization block for high frequencies. For low frequency adjustment, user-programmable parameters control the normalized signal amplitude in the signal normalization block and the low frequency adjustment in the equalization block.

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Joon-Sang Choi et. al., “A 0.18-um CMOS 3.5-Gb/s Continuous-Time Adaptive Cable Equalizer Using Enhanced Low-Frequency Gain Control Method,”IEEE Journal of Solid-State Circuits, vol. 39, No. 3, March 2004.
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Office Action dated Jan. 7, 2010 for Japanese Application No. 2006-318128.

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