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High-Q integrated RF filters

  • US 7,522,017 B1
  • Filed: 04/21/2005
  • Issued: 04/21/2009
  • Est. Priority Date: 04/21/2004
  • Status: Active Grant
First Claim
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1. A filter system comprising:

  • a resonate LC filter; and

    a Q-enhancement circuit coupled to the resonate LC filter, wherein the Q-enhancement circuit operates to improve a quality factor of the system and wherein the Q-enhancement circuit comprises a translinear loop that operates to provide an adjustable negative resistance.

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