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Q-controlled microresonators and tunable electronic filters using such resonators

  • US 5,491,604 A
  • Filed: 12/11/1992
  • Issued: 02/13/1996
  • Est. Priority Date: 12/11/1992
  • Status: Expired due to Term
First Claim
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1. A resonator system with a controlled quality factor, comprising:

  • a resonator having first, second and third ports, and a quality factor greater than said controlled quality factor;

    an amplifier having an input and an output, and a gain high enough to render said controlled quality factor substantially independent of the quality factor of said resonator; and

    wherein said second port is connected to the input of said amplifier and the output of said amplifier is connected to said third port so that when an input signal is applied to the resonator system at said first port, an output signal at said second port is applied to the input of said amplifier, and an output of said amplifier is applied to said third port for providing negative feedback to said resonator.

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