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:
Sep. 22, 2015
Filed:
Mar. 18, 2014
Seiko Epson Corporation, Tokyo, JP;
Motoaki Nishimura, Chino, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
An amplification circuit that can reduce an area without using transistors with a high withstand voltage. The amplification circuit () includes: an operational amplifier with a first input terminal connected to a reference node; a first capacitor (CA) provided between a first node and the reference node; a second capacitor (CA) provided between a second node and the reference node; a switch element (SW) provided between the first node and an input node of an input voltage; a switch element (SW) provided between the first node and a supply node of a first analog reference voltage; a switch element (SW) provided between the second node and an output node of an output voltage; a switch element (SW) provided between the second node and a supply node of a second analog reference voltage; and a switch element (SW) provided between the output node of the output voltage and the reference node.