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Voltage controlled oscillator

  • US 8,957,738 B1
  • Filed: 10/18/2012
  • Issued: 02/17/2015
  • Est. Priority Date: 10/18/2012
  • Status: Active Grant
First Claim
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1. A voltage controlled oscillator comprising:

  • an RF output terminal and a DC control terminal;

    an active circuit; and

    a resonant circuit interconnected with said active circuit and including at least three series resonators each having an electrically variable capacitance and a fixed inductor;

    said active circuit including at least one transistor having an operating current density which is approximately 35% or less of a peak transition frequency (fT) operating current density for providing an improved lower phase noise output at said RF output terminal.

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