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:
Aug. 27, 2019
Filed:
Nov. 29, 2017
Applicant:
National Chung Shan Institute of Science and Technology, Taoyuan, TW;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 5/12 (2006.01); H03L 7/093 (2006.01); H03D 7/14 (2006.01); H04L 27/00 (2006.01); H03B 27/00 (2006.01);
U.S. Cl.
CPC ...
H03B 5/1212 (2013.01); H03B 5/1218 (2013.01); H03B 5/1228 (2013.01); H03B 5/1265 (2013.01); H03B 5/1296 (2013.01); H03B 27/00 (2013.01); H03D 7/1425 (2013.01); H03L 7/093 (2013.01); H04L 27/0014 (2013.01); H03B 2200/009 (2013.01); H03B 2200/0074 (2013.01); H03B 2200/0078 (2013.01); H04L 2027/0016 (2013.01);
Abstract
A transformer feed-back quadrature voltage controlled oscillator (QVCO) includes a first VCO; a second VCO; and a dynamic phase error correction circuit, having a plurality of coupling capacitors connected between the first and second VCOs, wherein the capacitances of the coupling capacitors are varied according to a digital control signal to correct a phase error of local oscillating (LO) signals of quadrature phases output by the first and second VCOs.