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. 06, 2015
Filed:
May. 07, 2012
Applicant:
David Canard, Demouville, FR;
Inventor:
David Canard, Demouville, FR;
Assignee:
Asahi Kasei Microdevices Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L 7/00 (2006.01); H03L 7/085 (2006.01); H03L 7/089 (2006.01);
U.S. Cl.
CPC ...
H03L 7/085 (2013.01); H03L 7/089 (2013.01); H03L 7/0893 (2013.01); H03L 7/0891 (2013.01);
Abstract
A phase frequency detector realizes a highly linear conversion from noise-shaped ΣΔ modulation into charge quantities without degradation of phase-locked loop (PLL) phase noise. The phase frequency detector may feature a construction of an Up signal output and a Down signal output, in which the Up signal rises when a divided VCO input rises, an Up signal falls when the divided VCO input falls, a Down signal rises when the divided VCO input rises, and a Down signal falls when a reference input rises. A mode selection input may be utilized for a fast lock-up PLL.