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:
Aug. 27, 2019
Filed:
Jan. 31, 2017
Seiko Epson Corporation, Tokyo, JP;
Masuhide Ikeda, Matsumoto, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
This electrostatic protection circuit enables a trigger voltage to be set arbitrarily and enables a high hold voltage to be set, without providing an RC timer having a large circuit area. This electrostatic protection circuit is connected to a first terminal via a first node and is connected to a second terminal via a second node. The electrostatic protection circuit is provided with a plurality of circuit blocks that are connected in series between the first node and the second node, and at least one circuit block out of the plurality of circuit blocks includes a zener diode for setting a trigger voltage. The electrostatic protection circuit enters a conduction state when the potential of the first node becomes higher than the potential of the second node and the voltage between both ends of the circuit block including the zener diode reaches the breakdown voltage of the zener diode.