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:
Jan. 21, 2020
Filed:
Jun. 29, 2017
Applicant:
Rambus Inc., Sunnyvale, CA (US);
Inventors:
Mohammad Hekmat, Mountain View, CA (US);
Reza Navid, San Jose, CA (US);
Assignee:
Rambus Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 27/00 (2006.01); H03L 7/06 (2006.01); H03L 7/23 (2006.01); H03L 7/099 (2006.01); H03L 7/089 (2006.01);
U.S. Cl.
CPC ...
H03B 27/00 (2013.01); H03L 7/06 (2013.01); H03L 7/089 (2013.01); H03L 7/099 (2013.01); H03L 7/23 (2013.01);
Abstract
A phase-locked loop circuit comprises a multi-phase oscillator having a plurality of coupled oscillators. A calibration module detects mismatches between frequency characteristics of the different oscillators in the phase-locked loop circuit during a calibration process. The calibration module then calibrates the various oscillators to compensate for the detected mismatch. Once calibrated, the phase-locked loop circuit can operate with little or no performance degradation despite the mismatch in frequency characteristics between the different oscillators.