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:
Mar. 27, 2001
Filed:
Nov. 10, 1998
Ryuji Tohyama, Tokyo, JP;
Naruki Suetake, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A heat-sensitive type flow sensor which can be manufactured by using discrete parts at low cost in a miniature size with high accuracy and reliability includes a correcting circuitry capable of compensating for a detected current indicating a flow rate of a fluid of concern and outputted from a flow rate detecting circuit. In the heat-sensitive type flow sensor, an arithmetic processing circuit (,) for processing a detection voltage (V,) supplied from a flow rate detecting circuit (,) and indicating the flow rate includes a voltage-to-current conversion circuitry (,) for converting the detection voltage (V,) into a current (I,) and capable of performing gain adjustment, a correcting circuitry (,) for correcting a level of a current signal (I,) outputted from the voltage-to-current conversion circuit (,), and a detection current signal output circuit (,) for outputting the current signal (I,) corrected by the correcting circuitry (,) as a detection output current signal of the heat-sensitive type flow sensor. The correcting circuitry (,) includes diodes implemented as discrete parts which need not exhibit identical characteristic.