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. 10, 2023
Filed:
Jun. 16, 2021
Applicant:
University College Dublin, Dublin, IE;
Inventors:
Dawei Mai, Wuhan, CN;
Michael Peter Kennedy, Dublin, IE;
Assignee:
University College Dublin, Dublin, IE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03L 7/197 (2006.01); H03M 3/00 (2006.01);
U.S. Cl.
CPC ...
H03L 7/1976 (2013.01); H03M 3/404 (2013.01); H03M 3/436 (2013.01); H03M 3/438 (2013.01); H03L 2207/05 (2013.01);
Abstract
The present invention provides a fractional-N frequency synthesizer comprising a divider controller comprising a multistage noise Shaping (MASH) digital delta-sigma modulator comprising L error feedback modulator (EFM) stages, wherein the jth EFM stage is configured to receive as an input the sum of the error of the preceding EFM stage and a high amplitude dither signal derived from the error of the kth EFM stage, where 1≤j≤k≤L.