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Transformed current sensing relay for use in switched network modems and circuit incorporating same

  • US 5,426,698 A
  • Filed: 05/11/1993
  • Issued: 06/20/1995
  • Est. Priority Date: 05/11/1993
  • Status: Expired due to Term
First Claim
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1. A transformed current sensing relay, comprising:

  • a) a pair of relay contacts with at least one of said relay contacts being magnetically responsive;

    b) a relay coil which closes said pair of contacts in response to a current passing through said relay coil;

    c) a shorted secondary coil wrapped around said relay coil and inductively coupled to said relay coil such that said relay coil and said shorted secondary coil form a transformer; and

    d) a magnetic shield wrapped around said secondary coil.

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