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Transconductance and current modulation for resonant frequency control and selection

  • US 7,545,231 B2
  • Filed: 04/28/2007
  • Issued: 06/09/2009
  • Est. Priority Date: 03/22/2004
  • Status: Expired due to Fees
First Claim
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1. An apparatus for frequency control of a reference signal, the apparatus comprising:

  • a reference resonator to provide the reference signal having a selectable resonant frequency;

    a negative transconductance amplifier coupled to the reference resonator;

    a frequency controller to maintain a selected resonant frequency within a predetermined range in response to a variation of a parameter.

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