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:
Oct. 20, 1998
Filed:
Jan. 24, 1997
Hiroshi Takase, Kasugai, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
An improved output circuit that provides an output signal having a predetermined high voltage level regardless of the voltage of a high-potential power supply is described. In one embodiment, the invention includes a first transistor and a second transistor connected in series between a high-potential power supply and a low-potential power supply, and a third transistor connected in parallel to the first transistor between the high-potential power supply and the node between the first and second transistors. The first and second transistors are n-type MOS transistors and the third transistor is a p-type MOS transistor. In another embodiment, the invention further includes a supply voltage detector for detecting a voltage of the high-potential power supply and supplying a voltage signal to the first and third transistors for selectively enabling one of the first and third transistors based on the voltage detected.