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Multiple low speed sigma-delta analog front ends for full implementation of high-speed data link protocol

  • US 6,442,195 B1
  • Filed: 08/27/1997
  • Issued: 08/27/2002
  • Est. Priority Date: 06/30/1997
  • Status: Expired due to Term
First Claim
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1. A high speed communications transceiver for communicating through a channel with an upstream transceiver transmitting an analog data signal using M data carrying signals within a bandwidth F to the transceiver, said transceiver comprising:

  • a channel interface circuit for coupling to and receiving said analog data signal from the channel; and

    a front end receiving circuit for performing filtering and analog to digital conversion on the entire analog data signal by;

    (i) dividing such signal into a plurality of sub-bands, each sub-band including data from a frequency band which is a fractional portion of said bandwidth F and which contains a number of data carrying signals B, where B>

    1; and

    (ii) by sampling the sub-bands and generating a plurality of digital signals corresponding to data carrying signals within such sub-band; and

    a signal processing circuit for extracting data from the plurality of digital signals within the plurality of sub-bands.

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