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Analog successive approximation (SAR) analog-to-digital converter (ADC)

  • US 6,167,132 A
  • Filed: 03/04/1998
  • Issued: 12/26/2000
  • Est. Priority Date: 04/22/1997
  • Status: Expired due to Fees
First Claim
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1. A communication system, comprising:

  • phone line side circuitry capable of being coupled to phone lines;

    powered side circuitry capable of being coupled to said phone line side circuitry through an isolation barrier; and

    an analog-to-digital converter within said phone line side circuitry including a plurality of comparators having outputs that make up a multiple-bit digital value to be transmitted across said isolation barrier,wherein the multiple-bit digital value is indicative of phone line status information.

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