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. 10, 2020
Filed:
May. 30, 2017
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Yoshihiro Yamaguchi, Nagaokakyo, JP;
MURATA MANUFACTURING CO., LTD., Nagaokakyo, JP;
Abstract
A detection circuit includes a charge amplifier, a calculation unit, and first and second paths. The charge amplifier converts the amount of electric charge generated by a sensor element into a voltage. The first path and the second path each connect the charge amplifier and the calculation unit. The amplification factor of the first path is higher than the amplification factor of the second path. When a voltage output from the first path is lower than a threshold voltage, the calculation unit detects a pressing force by using the output voltage. When the output voltage is equal to or higher than the threshold voltage, the calculation unit detects a pressing force by using a voltage output through the second path.