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. 31, 2020
Filed:
Jun. 29, 2017
Applicant:
Qualcomm Incorporated, San Diego, CA (US);
Inventors:
Mazhareddin Taghivand, Santa Clara, CA (US);
Alireza Khalili, Sunnyvale, CA (US);
Mohammad Emadi, San Jose, CA (US);
Yashar Rajavi, San Jose, CA (US);
Assignee:
QUALCOMM Incorporated, San Diego, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03B 1/04 (2006.01); H03B 5/12 (2006.01); H03B 27/00 (2006.01);
U.S. Cl.
CPC ...
H03B 1/04 (2013.01); H03B 5/124 (2013.01); H03B 5/1212 (2013.01); H03B 5/1228 (2013.01); H03B 27/00 (2013.01); H03B 2200/007 (2013.01); H03B 2200/009 (2013.01); H03B 2200/0054 (2013.01);
Abstract
Certain aspects of the present disclosure provide methods and apparatus for reducing phase noise in voltage-controlled oscillators (VCOs). One example VCO generally includes a first resonant circuit comprising an inductor and a first variable capacitive element coupled in parallel with the inductor; and a second variable capacitive element coupled to a center tap of the inductor and further coupled to a reference voltage, wherein the center tap of the inductor is further coupled to a voltage source.