公开(公告)号：US20230291408A1

公开(公告)日：2023-09-14

申请号：US18181477

申请日：2023-03-09

Applicant: Microchip Technology Incorporated

Inventor： Siddhartha Hazra ,  Hormoz Djahanshahi

IPC: H03L7/099

CPC classification number: H03L7/0991

Abstract: One or more examples relate, generally to supply voltage based or temperature based fine control of a tunable oscillator of a PLL. An associated method includes: receiving one or more values indicative of temperature or supply voltage of a phase-locked loop (PLL); setting a digital fine-tuning control code to an initialization code, the initialization code at least partially based on the received one or more values indicative of temperature or supply voltage of the PLL, wherein the digital fine-tuning control code for setting a number of tuning-elements within a fine bank of a tunable oscillator; and starting, with the set digital fine-tuning control code, a process to set an initial frequency of the oscillator at or close to a target frequency. The process may be a calibration process performed before initially acquiring lock or re-acquiring lock.