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Frequency synthesizer using a VCO having a controllable operating point, and calibration and tuning thereof

  • US 6,744,324 B1
  • Filed: 04/14/2003
  • Issued: 06/01/2004
  • Est. Priority Date: 03/19/2001
  • Status: Expired due to Term
First Claim
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1. A frequency synthesizer calibrator, comprising:

  • a replica charge pump for duplicating at least two outputs expected to be produced by a main charge pump, wherein, the replica charge pump includes controls for enabling its at least two outputs; and

    wherein, the replica charge pump is connected to a voltage controlled oscillator that includes a bank of fixed-value capacitors for range selection.

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