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. 19, 2007
Filed:
Dec. 20, 2005
Yasuaki Makino, Okazaki, JP;
Norikazu Ohta, Aichi-gun, JP;
Yoshie Ohira, Nagoya, JP;
Hirofumi Funabashi, Nagoya, JP;
Yasuaki Makino, Okazaki, JP;
Norikazu Ohta, Aichi-gun, JP;
Yoshie Ohira, Nagoya, JP;
Hirofumi Funabashi, Nagoya, JP;
Denso Corporation, Kariya, JP;
Abstract
A reference voltage circuit includes an operational amplifier, a first fixed resistance resistor, a second fixed resistance resistor, a third fixed resistance resistor, a first diode and a second diode. The reference voltage circuit further includes a fourth fixed resistance resistor having an end connected to a non-inverting input terminal of the operational amplifier and the other end connected to the first diode. The reference voltage circuit is characterized by a value of the resistance of the fourth resistor being less than the resistance of the first resistor and a temperature coefficient of the fourth resistor being greater than any of the temperature coefficients of the first, second and third resistors.