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:
May. 16, 2017
Filed:
Sep. 16, 2016
Huawei Technologies Co., Ltd., Shenzhen, CN;
Bingzhao Zhang, Shanghai, CN;
Yongwang Liu, Shanghai, CN;
Huawei Technologies Co., Ltd., Shenzhen, CN;
Abstract
A phase-locked loop circuit, which includes a phase frequency detector, a charge pump, a loop low-pass filter, a first voltage-current converter, a second voltage-current converter, a current-controlled oscillator, a frequency divider, a comparator, and a mode controller, where the mode controller is configured to control the switches SSand Sincluded in the loop low-pass filter to connect or disconnect. Using the phase-locked loop circuit, a voltage value of a second control voltage signal VCprovided for the first voltage-current converter can reach, in a relatively short time, a voltage value of a first control voltage signal VCprovided for the second voltage-current converter, thereby increasing a speed of establishing the phase-locked loop circuit and implementing a quick response of the phase-locked loop circuit.