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Low noise and low power voltage-controlled oscillator (VCO) using transconductance (gm) degeneration

  • US 10,050,586 B2
  • Filed: 02/21/2017
  • Issued: 08/14/2018
  • Est. Priority Date: 03/11/2014
  • Status: Active Grant
First Claim
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1. A voltage-controlled oscillator (VCO) comprising:

  • a resonant tank circuit;

    an active negative transconductance circuit connected with the resonant tank circuit, comprising a plurality of transistors, and having a variable transconductance, the plurality of transistors comprising an array of transistors varying in effective size to implement the variable transconductance; and

    a bias current circuit for sourcing or sinking a bias current through the resonant tank circuit and the active negative transconductance circuit to generate an oscillating signal.

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