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:
Oct. 03, 2017
Filed:
Feb. 24, 2015
Rohm Co., Ltd., Kyoto, JP;
Yoshinori Sato, Kyoto, JP;
Manabu Oyama, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A discharge circuit has a voltage divider arranged to divide an alternating-current input voltage to produce a divided voltage, a high-pass filter arranged to pass a high-frequency component of the divided voltage to produce a monitoring voltage, a comparator arranged to compare the monitoring voltage with a threshold voltage to produce a comparison signal, a timer arranged to generate a timer signal indicating whether or not the comparison signal has been kept at the same logic level for a mask period, a controller arranged to generate a discharge control signal according to the timer signal, and a discharger arranged to discharge, according to the discharge control signal, an X capacitor connected to a node to which the alternating-current input voltage is applied.