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Transconductance and current modulation for resonant frequency control and selection

  • US 7,227,424 B2
  • Filed: 03/21/2005
  • Issued: 06/05/2007
  • Est. Priority Date: 03/22/2004
  • Status: Active Grant
First Claim
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1. An apparatus for frequency control of a reference signal;

  • the apparatus comprising;

    a reference resonator adapted to provide the reference signal having a resonant frequency;

    a negative transconductance amplifier coupled to the reference resonator; and

    a frequency controller coupled to the negative transconductance amplifier and coupled to the reference resonator, the frequency controller adapted to modify the resonant frequency in response to at least one variable of a plurality of variables.

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