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:
May. 27, 2014
Filed:
Dec. 16, 2009
Changhua Mou, Beijing, CN;
Di Zhao, Beijing, CN;
Changhua Mou, Beijing, CN;
Di Zhao, Beijing, CN;
Beijing Sevenstar Electronics Co., Ltd., Beijing, CN;
Abstract
A flow meter is disclosed, which composes an operational amplifier, a digital potentiometer, a sensor coil, and fixed resistors R, Rand R. One end of the coil is connected to the non-inverting input terminal of the amplifier, the other end is grounded. The Ris connected between the non-inverting input terminal and the output terminal of the amplifier, the inverting input terminal of the amplifier is connected to one end of Rand R, the other end of Ris connected to the output terminal of the amplifier, and the other end of Ris grounded. The connecting end of Rand the output terminal of the amplifier is connected to the high side of the potentiometer, the grounded end of Ris connected to the low side of the potentiometer, and the inverting input terminal of the amplifier is also connected to the sliding end of the potentiometer.