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SWEEP SIGNAL METER READING SYSTEM

  • US 3,719,928 A
  • Filed: 02/10/1971
  • Issued: 03/06/1973
  • Est. Priority Date: 04/03/1970
  • Status: Expired due to Term
First Claim
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1. An information detection system for detecting the data of a multiplicity of information sources coupled to a line, utilizing a sweep generator and the switching of resonance circuits associated individually with the respective information sources, comprising:

  • first hybrid circuit means for connecting the output of a sweep generator to said line through a first terminal and for deriving the reflected wave from said line through a second terminal, limiting means connected to said sEcond terminal for amplitude limiting said reflected wave, and means for mixing the reflected wave with the output of said sweep generator after amplitude limitation to generate a detection output;

    second hybrid circuit means connected to said sweep generator for preventing noises and the reflected waves from said line from mixing into said output of the sweep generator; and

    third hybrid circuit means for applying a part of the output of said sweep generator to a parallel connection circuit of series resonance impedances which resonate at respective sampling frequencies, means for mixing the reflected wave with said output of the sweep generator to provide a sampling pulse, and means for sampling the detection output in response to generation of said sampling pulse.

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