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Capacitively coupled ring detector with power provided across isolation barrier

  • US 6,198,816 B1
  • Filed: 03/04/1998
  • Issued: 03/06/2001
  • 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 that may be coupled to phone lines;

    powered side circuitry that may be coupled to the phone line side circuitry through a capacitive isolation barrier wherein a signal transmitted across the capacitive isolation barrier is utilized to provide a power supply for at least a portion of the phone line side circuitry;

    phone line side ringer circuitry formed within an integrated portion of the phone line side circuitry and powered side ringer circuitry formed within the powered side circuitry; and

    a capacitive interface coupling the phone line side ringer circuitry to phone lines.

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