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. 01, 2019
Filed:
Nov. 08, 2017
Azbil Corporation, Chiyoda-ku, JP;
Osamu Momose, Chiyoda-ku, JP;
AZBIL CORPORATION, Chiyoda-ku, JP;
Abstract
An electromagnetic flowmeter includes a board having a preamplifier circuit and a shield case mounted thereon. The preamplifier circuit amplifies an electromotive force generated between first and second electrodes disposed to be perpendicular to a magnetic field generated by an exciting coil on a measurement pipe. The preamplifier circuit includes first and second operational amplifiers, a first wiring connecting the first electrode and a non-inverting input terminal of the first operational amplifier, a second wiring connecting the second electrode and a non-inverting input terminal of the second operational amplifier, a first resistor connecting an output terminal and an inverting input terminal of the first operational amplifier, a second resistor connecting an output terminal and an inverting input terminal of the second operational amplifier, and a third resistor connecting the inverting terminals of the first and second operational amplifiers.