公开(公告)号：EP4262091A1

公开(公告)日：2023-10-18

申请号：EP23161535.2

申请日：2023-03-13

Applicant: STMicroelectronics S.r.l.

Inventor： FORTUNATO, Davide Nicolo ,  CALCAGNO, Antonino ,  VINCIGUERRA, Marco ,  SCUDERI, Angelo ,  COSENTINO, Gaetano

IPC: H03L7/087 ,  H03L7/099 ,  H03L7/113

Abstract: A voltage-controlled oscillator, VCO in a PLL circuit is calibrated via a dichotomous search in a set of candidate frequency bands (0, 31) via a sequence of subsequent halving steps (that produce reduced subsets (0, 15; 7, 15; 11, 15; 13, 15; 12, 14; 12, 13) of the set of candidate frequency bands (0, 31). The reduced subsets (0, 15; 7, 15; 11, 15; 13, 15; 12, 14; 12, 13) have respective upper bound values (max; 15, 15, 15, 15, 14, 13), lower bound values (min; 0, 7, 11, 13, 12, 12) as well as central values (center; 7, 11, 13, 14, 13, 12). The central value of the subset resulting from the halving step of index i in the sequence is a function of the average ((max + min/2)) of the upper bound value (max) and the lower bound (min) value of the subset resulting from the halving step of index i-1 in the sequence.