Patent ID: 6046645
Filing Date: 2000-04-04
Classification: H03L

Abstract:
A method for the digital control of a phase-locked loop, comprising a voltage controlled oscillator (VCO), characterized in that the following steps are provided:calculating a first difference pe(t) between a phase of an input signal ps(t) and a local phase pl(t) of the signal produced by said voltage controlled oscillator (VCO);calculating digital estimates of both phase spe(t) and frequency sfe(t) errors of said first difference pe(t);carrying out a separate adaptive digital filtering of said digital estimates of phase spe(t) and frequency sfe(t) errors, obtaining respective phase fpe(t) and frequency ffe(t) filtered digital signals;calculating a command signal com(t) for said voltage controlled oscillator (VCO) constituted by a combination of the contributions by said phase fpe(t) and frequency ffe(t) filtered digital signals.