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:
Jun. 04, 1996
Filed:
Apr. 20, 1995
Masahiko Hashimoto, Toyonaka, JP;
Yoshio Tomigashi, Neyagawa, JP;
Yoshitoshi Morita, Kawanishi, JP;
Michio Kunimitsu, Hirakata, JP;
Akira Sakaguchi, Kobe, JP;
Tomomi Yamaguchi, Kyoto, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Advanced Software Technology & Mechatronics Research Institute of Kyoto, Kyoto, JP;
Abstract
In an external force measuring system comprising a piezoelectric element 61 or producing a charge when acted on by an external force, and a charge amplifier 7 chargeable with a variation in the charge produced by the piezoelectric element to output a voltage signal, the charge amplifier 7 comprises a feedback loop having an on-off controllable switch 8 connected in parallel therewith. The switch 8 is on-off controlled by a comparator 81 for comparing the output voltage with a reference value and is closed while no external force acts on the element.