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. 28, 2017
Filed:
Dec. 03, 2013
Qualcomm Incorporated, San Diego, CA (US);
Qing Shi, Shanghai, CN;
Yahuan Liu, Shanghai, CN;
Robert Yongli Wen, San Diego, CA (US);
James Qian Zhang, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
A method and apparatus of clock recovery is disclosed. A communications device matches the frequency of a local clock signal with the frequency of a transmit clock signal of a transmitting device based on a first set of signals received from the transmitting device during a low-speed information exchange. The low-speed information exchange may correspond to an autonegotiation operation, wherein each of the transmitting device and the communications device declares its communication capabilities to the other device. The communications device then determines a frequency offset to be applied to the local clock signal during a high-speed data communication with the transmitting device. During the high-speed communication, the communications device may apply the frequency offset to the local clock signal and match the phase of the receive clock signal with the phase of the transmit clock signal based on a second set of signals received from the transmitting device.