Patent ID: 8198944
Filing Date: 2012-06-12
Classification: H03B,H03J,H03L,H03M

Abstract:
1. A method of calibrating a digitally controlled oscillator (DCO) with a coarse frequency tuning bank with multiple coarse frequency tuning segments, an auxiliary frequency tuning bank, and a fine frequency tuning bank, comprising: determining an initial set of DCO tuning codes for operating the DCO utilizing the multiple coarse frequency tuning segments, the auxiliary frequency tuning bank and the fine frequency tuning bank, wherein each DCO tuning code has a coarse frequency tuning segment tuning code portion and a fine frequency tuning bank tuning code portion, wherein the fine frequency tuning bank tuning code portion controls the fine frequency tuning bank and the auxiliary frequency tuning bank; identifying a range of output frequencies produced for each coarse frequency tuning segment when the auxiliary frequency tuning bank is set at mid-scale, wherein the range for each coarse frequency tuning segment corresponds to an associated set of DCO tuning codes; identifying a gap between the ranges of two consecutive coarse frequency tuning segments; and adjusting the setting of the auxiliary frequency tuning bank of at least one of the DCO codes of the set of DCO codes corresponding to at least one of the two coarse frequency tuning segments thereby generating a revised set.