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AMPLIFIER UTILIZING INPUT SIGNAL POWER

  • US 3,789,314 A
  • Filed: 12/06/1971
  • Issued: 01/29/1974
  • Est. Priority Date: 12/06/1971
  • Status: Expired due to Term
First Claim
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1. Ain amplifier for coupling a signal source to an output load comprising:

  • a low-loss passive wavepath;

    first and second amplifying stages;

    one of said stages having an input impedance that is at least an order of magnitude greater than the impedance of said signal source, while the other of said stages has an input impedance that is at least an order of magnitude smaller than the impedance of said signal source;

    one of said stages having an output impedance that is at least an order of magnitude greater than the impedance of said output load, while the other of said stages has an output impedance that is at least an order of magnitude smaller than the impedance of said output load;

    an input circuit for coupling said signal source to said amplifying stages and to said passive wavepath including;

    means for sensing the current flowing into said passive wavepath and coupling a current proportionate thereto into said lower input impedance stage; and

    means for sensing the voltage at the input end of said wavepath and for coupling a voltage proportionate thereto to the higher input impedance stage; and

    a signal injection network for constructively summing in said output load the signal at the output end of said passive wavepath and the output signals from said two stages.

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