Title:
【発明の名称】自動ケーブル等化器、AGCシステム、及び、DCレストアラが改良された、直列デジタル・データ通信用受信機
Document Type and Number:
Japanese Patent JP2001519107
Kind Code:
A
Abstract:
A serial digital data communications receiver with an improved automatic cable equalizer that is less susceptible to jitter and has greater multi-standards capability, and an improved automatic gain control system with a DC restorer that provides optimal edge jitter performance while avoiding the possibility of a latch-up condition at the start of data transmission. The automatic cable equalizer for equalizing signals received over cables of different lengths has multiple stages each having a transfer function of 1+Ki[fi(j)] wherein each of the Ki vary in accordance with a sequential gain control methodology. The AGC system uses the difference between band-pass filtered versions of the amplitudes of the input and output of a DC restorer based on quantized feedback, to regulate the AGC circuit. The DC restorer comprises a comparator for generating a quantized output and further clamps the input with a clamping circuit so that a version of the quantized output is fed back to the input while avoiding the possibility of operational failure of the comparator at the onset of data transmission.
Inventors:
Webster, stephan eye
Application Number:
JP54217498A
Publication Date:
October 16, 2001
Filing Date:
April 01, 1998
Export Citation:
Assignee:
Jenham Corporation
International Classes:
H04B3/04; H03G3/30; H03G5/00; H04L25/06; (IPC1-7): H04B3/04
Attorney, Agent or Firm:
Seiji Yanagida (1 person outside)