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Dual-control ring voltage controlled oscillator

  • US 6,396,358 B1
  • Filed: 01/31/2001
  • Issued: 05/28/2002
  • Est. Priority Date: 01/31/2001
  • Status: Expired due to Fees
First Claim
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1. A dual-control ring voltage controlled oscillator, comprising:

  • (a) a delay interpolator connected to at least a short path and a long path;

    (b) a plurality of delay stages at the output of the delay interpolator along each of the at least short path and long path, the short path having fewer delay stages than the long path;

    (c) a plurality of variable capacitors interspersed among the plurality of delay stages;

    (d) an input coarse tune code to vary the capacitance of the plurality of variable capacitors; and

    (e) an input fine tune code to vary an interpolation variable thereby interpolating the delay through at least the short path and/or long path.

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