Wideband Multi-mode Vco

  • Published: Jun 28, 2012
  • Earliest Priority: Dec 28 2010
  • Family: 11
  • Cited Works: 0
  • Cited by: 12
  • Cites: 3
  • Additional Info: Full text
Abstract

A VCO includes a transformer-based resonator that has a first LC tank and a second LC tank. The resonator has an even resonant mode and an odd resonant mode. The VCO further includes an active transconductance network that is coupled to a two-terminal port of the first tank and is also coupled to a two-terminal port of the second tank. A first terminal of the port of the first tank is capacitively coupled to a first terminal of the port of the second tank. A second terminal of the port of the first tank is capacitively coupled to a second terminal of the port of the second tank. The active transconductance network causes the resonator to resonate in a selectable one of the even and odd resonant modes depending on a digital control signal. The VCO is fine tuned by changing the capacitances of capacitors of the tanks.


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Document History
  • Publication: Jun 28, 2012
  • Application: Dec 28, 2010
    US US 97965910 A
  • Priority: Dec 28, 2010
    US US 97965910 A

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