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. 22, 2005
Filed:
May. 19, 2004
Takafumi Matsumura, Hitachinaka, JP;
Noboru Sugiura, Mito, JP;
Kenichi Katagishi, Hitachinaka, JP;
Masahiro Matsumoto, Hitachi, JP;
Keiji Hanzawa, Mito, JP;
Takafumi Matsumura, Hitachinaka, JP;
Noboru Sugiura, Mito, JP;
Kenichi Katagishi, Hitachinaka, JP;
Masahiro Matsumoto, Hitachi, JP;
Keiji Hanzawa, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Car Engineering Co., Ltd., Hitachinaka, JP;
Abstract
A gas flow meter having a gas flow detection circuit for detecting a current flowing through a resistor installed in a gas passage and a voltage generated across the resistor and outputting a voltage signal representing a gas flow passing through the gas passage; a noise reduction circuit for reducing external noise; and a digital adjusting circuit for digitally adjusting a signal representing the detected gas flow and outputting the adjusted signal; wherein a voltage signal based on the signal adjusted by the digital adjusting circuit is output.