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. 04, 2025
Filed:
Nov. 28, 2022
Seiko Epson Corporation, Tokyo, JP;
Masayoshi Todorokihara, Suwa, JP;
SEIKO EPSON CORPORATION, , JP;
Abstract
A vibration rectification error correction device includes a reference signal generation circuit configured to output a reference signal, a frequency delta-sigma modulation circuit configured to perform a frequency delta-sigma modulation on the reference signal using a measurement target signal to generate a frequency delta-sigma modulation signal, a first filter which is disposed in a posterior stage of the frequency delta-sigma modulation circuit, and operates in sync with the measurement target signal, and a second filter which is disposed in a posterior stage of the first filter, and operates in sync with a first frequency signal asynchronous with the reference signal.