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:
Jun. 23, 2020
Filed:
Sep. 26, 2018
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Assignee:
HITACHI, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01P 15/125 (2006.01); G01P 15/13 (2006.01); G01P 15/08 (2006.01);
U.S. Cl.
CPC ...
G01P 15/125 (2013.01); G01P 15/0802 (2013.01); G01P 15/131 (2013.01);
Abstract
A servo control signal is binarized using a digital delta-sigma modulator. The digital delta-sigma modulator forms a feedback loop including a digital adder/subtractor, a digital integrator, and a one-bit quantizer to perform pulse-density modulation of the input servo control signal and output the signal as a binary value of +1 or −1.