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. 17, 2016
Filed:
Mar. 14, 2013
Qualcomm Incorporated, San Diego, CA (US);
Li Liu, San Diego, CA (US);
Praveen-Kumar Sampath, San Diego, CA (US);
Lai Kan Leung, San Marcos, CA (US);
Chiewcharn Narathong, Laguna Nigel, CA (US);
Soon-Seng Lau, San Diego, CA (US);
Ketan Humnabadkar, San Diego, CA (US);
Raghu Narayan Challa, San Diego, CA (US);
Devavrata Vasant Godbole, Carlsbad, CA (US);
QUALCOMM INCORPORATED, San Diego, CA (US);
Abstract
Techniques for detecting and correcting phase discontinuity of a local oscillator (LO) signal are disclosed. In one design, a wireless device includes an LO generator and a phase detector. The LO generator generates an LO signal used for frequency conversion and is periodically powered on and off. The phase detector detects the phase of the LO signal when the LO generator is powered on. The detected phase of the LO signal is used to identify phase discontinuity of the LO signal. The wireless device may further include (i) a single-tone generator that generates a single-tone signal used to detect the phase of the LO signal, (ii) a downconverter that downconverts the single-tone signal with the LO signal and provides a downconverted signal used by the phase detector to detect the phase of LO signal, and (iii) phase corrector that corrects phase discontinuity of the LO signal in the analog domain or digital domain.