公开(公告)号：US20230327677A1

公开(公告)日：2023-10-12

申请号：US18192285

申请日：2023-03-29

Applicant: STMicroelectronics S.r.I.

Inventor： Davide Nicolo Fortunato ,  Antonino Calcagno ,  Marco Vinciguerra ,  Angelo Scuderi ,  Gaetano Cosentino

IPC: H03L7/099

CPC classification number: H03L7/0992

Abstract: A voltage-controlled oscillator in a phase-locked loop circuit is calibrated via a dichotomous search in a set of candidate frequency bands via a sequence of subsequent halving steps that produce reduced subsets of the set of candidate frequency bands. The reduced subsets have respective upper bound values and lower bound values, as well as central values. The central value of the subset resulting from the halving step of index i in the sequence is a function of the average of the upper bound value and the lower bound value of the subset resulting from the halving step of index i−1 in the sequence.

公开(公告)号：US20230361727A1

公开(公告)日：2023-11-09

申请号：US18308850

申请日：2023-04-28

Applicant: STMicroelectronics S.r.I.

Inventor： Gaetano Cosentino

IPC: H03G3/30 ,  H03F3/19

CPC classification number: H03F3/19 ,  H03G3/30 ,  H03F2200/451 ,  H03G2201/103

Abstract: A circuit includes an amplifier and a feedback network coupled between the input and the output of the amplifier. The feedback network includes a plurality of parallel coupled branches, each branch having a first selection switch coupled to the input, a second selection switch coupled to the output, and an impedance between the first and second selection switches. Each branch includes a plurality of signal feedback paths coupled in parallel, each having a tuning switch coupled between the first selection switch and the second selection switch of that branch. A control unit is coupled to the feedback network and configured to vary a gain of the amplifier by selectively placing the first and second selection switches of each branch in a conductive state or a non-conductive state and selectively activating respective tuning switches of any branch having first and second selection switches in the conductive state.