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:
Nov. 03, 2020
Filed:
Jan. 16, 2019
Sanken Electric Co., Ltd., Niiza, JP;
Osamu Ohtake, Saitama, JP;
SANKEN ELECTRIC CO., LTD., Niiza, JP;
Abstract
An alternating-current voltage detection circuit for detecting an alternating-current voltage from an alternating-current power source according to one or more embodiments may include: a rectification circuit that performs full-wave rectification on an alternating-current voltage from the alternating-current power source and supplies a rectified output to a load; a series circuit comprising a first capacitor and a second capacitor electrically connected in series between one end of the alternating-current power source and the ground terminal of the rectification element; a discharge circuit that causes the second capacitor to discharge such that an absolute value of dv/dt voltage does not reach a predetermined voltage, wherein the second capacitor is electrically connected to the ground terminal side of the rectification element; and a predetermined period generator that outputs a signal after an elapse of a predetermined period of time from stoppage of a discharge operation of the discharge circuit.