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Radio frequency noise reduction arrangement

  • US 5,826,181 A
  • Filed: 10/10/1996
  • Issued: 10/20/1998
  • Est. Priority Date: 05/18/1996
  • Status: Expired due to Term
First Claim
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1. A frequency selective noise reduction arrangement operating at radio frequency comprisingan input, a divider, a combiner, an output and first and second paths between the divider and combiner;

  • wherein the first path possesses a phase lock loop circuit, an amplifier and a phase inverter and the second path is connected to the combiner;

    wherein the divider is operable to divide an input signal into the first and second paths and the first path is operable to select, amplify and phase invert a noise signal present in the input signal;

    wherein the combiner is operable to combine the signal of the first path with the signal of the second path; and

    wherein the phase inverted and amplified noise signal of the first path can be combined with the noise signal in the second path by the combiner whereby the noise is reduced from the output signal at the output of the combiner.

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