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Tunable filter devices and methods

  • US 9,735,758 B2
  • Filed: 05/06/2016
  • Issued: 08/15/2017
  • Est. Priority Date: 08/30/2010
  • Status: Active Grant
First Claim
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1. A device for performing analog filtering of a signal, comprising:

  • a first unit comprising;

    a first cell comprising;

    a first splitter for splitting said signal into a first signal and a second signal;

    a first channel connected to said first splitter for receiving said first signal;

    a second channel having at least one of a first delay element, a first phase shifter and a first amplitude compensator, wherein said second channel is connected to said first splitter for receiving said second signal;

    a first combiner for combining a signal output from said first channel with a signal output from said second channel to produce a first cell output signal;

    a second cell coupled to said first cell for receiving said first cell output signal, said second cell comprising;

    a second splitter for splitting said first cell output signal into a third signal and a fourth signal;

    a third channel connected to said second splitter for receiving said third signal;

    a fourth channel having at least one of a second delay element, a second phase shifter and a second amplitude compensator, wherein said third channel is connected to said second splitter for receiving said fourth signal;

    a second combiner for combining a signal output from said third channel with a signal output from said fourth channel to produce a second cell output signal; and

    a bypass for bypassing at least one of said first and second cells in accordance with a desired roll-off or stopband characteristic.

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