公开(公告)号：US10833683B2

公开(公告)日：2020-11-10

申请号：US15984387

申请日：2018-05-20

Applicant: KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION

Inventor： Hyunsun Mo ,  Dae Jeong Kim

IPC: H03L7/085 ,  H03L7/107 ,  H03L7/16 ,  H03L7/093 ,  H03L7/08 ,  H03L7/089 ,  H03B29/00 ,  H03C3/09 ,  H04B15/04

Abstract: A clock generator including a phase frequency detector configured to compare a phase and a frequency of a reference clock signal with a phase and a frequency of a first output clock signal and generate a detection signal based on a difference in the phases and frequencies of the clock signals; a loop filter configured to generate a first control voltage signal based on the detection signal; a first voltage controlled oscillator configured to generate and output a first output clock signal based on the first control voltage signal, a modulation filter configured to generate a modulation voltage signal based on the reference clock signal and generate a second control voltage signal by combining the modulation voltage signal and the first control voltage signal, and a second voltage controlled oscillator configured to generate and output a second output clock signal based on the second control voltage signal is provided.

公开(公告)号：US20190058479A1

公开(公告)日：2019-02-21

申请号：US15984387

申请日：2018-05-20

Applicant: KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION

Inventor： Hyunsun Mo ,  Dae Jeong Kim

IPC: H03L7/085 ,  H03L7/107 ,  H03C3/09 ,  H03B29/00

Abstract: A clock generator including a phase frequency detector configured to compare a phase and a frequency of a reference clock signal with a phase and a frequency of a first output clock signal and generate a detection signal based on a difference in the phases and frequencies of the clock signals; a loop filter configured to generate a first control voltage signal based on the detection signal; a first voltage controlled oscillator configured to generate and output a first output clock signal based on the first control voltage signal, a modulation filter configured to generate a modulation voltage signal based on the reference clock signal and generate a second control voltage signal by combining the modulation voltage signal and the first control voltage signal, and a second voltage controlled oscillator configured to generate and output a second output clock signal based on the second control voltage signal is provided.