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:
Mar. 26, 2013
Filed:
Aug. 19, 2011
Anders Jakobsson, Kista, SE;
Christian Grewing, Kista, SE;
Anders Emericks, Kista, SE;
Ola Pettersson, Kista, SE;
Bingxin LI, Kista, SE;
Anders Jakobsson, Kista, SE;
Christian Grewing, Kista, SE;
Anders Emericks, Kista, SE;
Ola Pettersson, Kista, SE;
Bingxin Li, Kista, SE;
Huawei Technologies Co., Ltd., Shenzhen, CN;
Abstract
A Digital Calibration System for a Phase Locked Loop includes a Tuning Voltage Controller configured to set the tuning voltage to a value; a Phase Difference Quantizer configured to output a phase difference after comparing a phase of the reference signal with a phase of the feedback signal; a Digital Controller configured to receive the phase difference of the PDQ and control a coarse tuning signal such that an average phase difference of the PDQ is 0; and a Frequency Calibration Logic configured to calibrate the feedback signal in response to the output of the DC.