The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 2019
Filed:
Jul. 05, 2018
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Takeshi Endo, Saitama, JP;
NIHON DEMPA KOGYO CO., LTD., Tokyo, JP;
Abstract
A PLL circuit includes a voltage control oscillator, a frequency difference detector, a phase difference detector, and an outputter. The frequency difference detector detects a frequency difference between a reference signal and the oscillation signal and outputs a first control value based on the detected frequency difference. The phase difference detector detects a phase difference between the reference signal and the oscillation signal, and outputs a second control value based on the detected phase difference. The outputter outputs the control voltage based on the first control value and the second control value to the voltage control oscillator while the second control value does not exceed a predetermined range, and outputs the control voltage based on a corrected value obtained by correcting the first control value and the second control value to the voltage control oscillator while the second control value exceeds a predetermined range.