公开(公告)号：US20240120927A1

公开(公告)日：2024-04-11

申请号：US18142939

申请日：2023-05-03

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jusung LEE ,  Wonsik YU ,  Youngwoo JO ,  Wooseok KIM

IPC: H03L7/091 ,  H03L7/089

CPC classification number: H03L7/091 ,  H03L7/089

Abstract: A phase-locked loop device and its operating method are provided. The phase-locked loop device includes a voltage controlled oscillator configured to generate an output clock signal, a divider configured to divide the output clock signal into first and second phase division signals having a constant phase difference, a sampling phase frequency detector configured to sample a sampling voltage based on the first phase division signal and output any one of the sampling voltage, a first supply voltage, and a second supply voltage based on the second phase division signal, a transconductance circuit configured to output a conversion current based on a hold voltage, and a loop filter configured to generate a voltage control signal based on the conversion current and output the voltage control signal to the voltage controlled oscillator.