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:
Sep. 04, 2001
Filed:
Jan. 07, 1999
Osamu Kitade, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A /POR circuit which can detect a power-on of a power supply voltage without fail even in a case where a potential of the power supply rises gently and which produces a /POR signal having a waveform sufficient for initializing internal circuits, as well as a semiconductor device having the /POR circuit. In a power-on reset circuit, a first line potential monitoring circuit and a second line potential monitoring circuit detect a line potential, and there is provided in a /POR signal waveform generation circuit a setting circuit which outputs a pulse signal in response to the results of such detection and operates in response to the pulse signal. Even when the potential of a power-on reset signal rises gently at power-on, the power-on reset signal can be brought to an activation potential without fail, thereby initializing internal circuits.