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Diode-quad bridge circuit means

  • US 3,883,812 A
  • Filed: 01/16/1974
  • Issued: 05/13/1975
  • Est. Priority Date: 12/20/1971
  • Status: Expired due to Term
First Claim
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1. Diode-quad bridge circuit means comprising:

  • a diode bridge including first, second, third and fourth bridge terminals consecutively coupled together by four diodes polarized in circulating relationship;

    a coaxial cable including an inner conductor and an outer conductor, one end of said inner conductor being coupled to said first bridge terminal, and one end of said outer conductor being coupled to said third bridge terminal;

    a signal source for developing a signal of balanced alternating polarity, said signal source having a first source terminal coupled to the other end of said outer conductor, and a second source terminal;

    a first coupling capacitor coupling said second source terminal to the other end of said inner conductor;

    a second coupling capacitor coupling said first bridge terminal to said third bridge terminal;

    a first impedance means connected between said second bridge terminal and said one end of said outer conductor;

    a second impedance means connected between said fourth bridge terminal and said one end of said outer conductor; and

    an output terminal coupled to said other end of said inner conductor whereby the voltage developed between said output terminal and said first source terminal is proportional to the difference of the impedances of said first impedance means and said second impedance means divided by the sum of the impedances of said first impedance means and said second impedance means.

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