公开(公告)号：US20250088343A1

公开(公告)日：2025-03-13

申请号：US18793128

申请日：2024-08-02

Applicant: STMicroelectronics International N.V.

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

IPC: H04L7/033

Abstract: In a PLL, a VCO is controlled by a control voltage and produces an output periodic signal. A comparator compares the control voltage to a comparison signal, and asserts/de-asserts a detection signal if the control voltage is higher/lower than the comparison signal. A digital logic circuit receives the detection signal, produces the comparison signal, and produces a compensation signal to control the VCO. During a VCO compensation procedure first phase, the digital logic circuit determines and stores a value of the comparison signal that corresponds to a current value of the control voltage, and compares the stored value of the comparison signal to a target value to determine whether the control voltage needs to be increased or decreased. During a VCO compensation procedure second phase, the digital logic circuit iteratively changes the value of the compensation signal until the control voltage reaches a desired value.