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:
Dec. 26, 2000
Filed:
Dec. 17, 1998
Masahumi Miyawaki, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A power supply circuit comprising a reference voltage generating circuit and an internal voltage generating circuit, whereby a stable internal voltage can be supplied. The reference voltage generating circuit comprises a resistor, of which one end is coupled to a power supply terminal, and a first NMOSFET, of which the drain electrode is coupled to the other end of the resistor, the source electrode is coupled to an earth terminal, and the gate electrode is coupled to the drain electrode. The internal voltage generating circuit comprises a second NMOSFET, of which the gate electrode is coupled to the drain electrode of the first NMOSFET and the source electrode is coupled to the earth terminal, and a constant voltage generating circuit, coupled between the drain electrode of the second NMOSFET and the power supply terminal, which outputs a constant voltage. The gate length of the first NMOSFET is formed longer than the gate length of the second NMOSFET.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile