Patent ID: 8154351
Filing Date: 2012-04-10
Classification: H03J,H03L

Abstract:
1. A method for measuring the gain of a voltage-controlled oscillator (VCO) in a phase-locked loop (PLL) configured to apply a two-point modulation scheme, the method comprising: opening a feedback loop of the PLL; directing the VCO via a first input to produce a desired output frequency; applying a first control signal to a second input of the VCO; configuring an array of capacitors in the VCO; measuring the output frequency of the VCO responsive to the first control signal; applying a second control signal to the second input of the VCO; measuring the output frequency of the VCO responsive to the second control signal; and determining the gain of the VCO as a function of output frequencies responsive to voltage values applied at the second input of the VCO.