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, 2007
Filed:
Feb. 18, 2005
Hirofumi Yuki, Kyoto, JP;
Yasunori Kawamura, Kyoto, JP;
Hirofumi Yuki, Kyoto, JP;
Yasunori Kawamura, Kyoto, JP;
Rohm Co., Ltd., , JP;
Abstract
A comparator is provided, which compares an input voltage and a reference voltage by using a plurality of inverting circuits connected in series. The comparator includes a first inverting circuit, a second inverting circuit, a feedback path, and a capacitor arranged on the feedback path. The first inverting circuit inverts a difference between the input voltage and the reference voltage for output. The second inverting circuit further inverts the output of the first inverting circuit for output. The feedback path feeds back the output of the second inverting circuit to the input side of the first inverting circuit. The capacitor causes hysteresis such that an increasing threshold and a decreasing threshold of the second inverting circuit corresponding to an increase and a decrease of the input voltage have a difference therebetween.