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:
Feb. 01, 2005
Filed:
Jan. 15, 2003
Koji Takeshita, Tokyo, JP;
Koji Takeshita, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
An output buffer circuit of the invention comprises a first output transistor connected between a power supply potential node and an output node, a second output transistor connected between a ground potential node and the output node, a first control circuit for controlling a conductive state of the first output transistor, a first clamp circuit for supplying a given potential to a first node to which the first control circuit is connected, a control circuit for controlling a conductive state of the second output transistor, and a second clamp circuit for supplying a given potential to a second node to which the second control circuit is connected. The first clamp circuit supplies a given potential to the first node when the first control circuit is inactivated, and stops the supply of the given potential when the first control circuit is activated. The second clamp circuit supplies a given potential to the second node when the second control circuit is inactivated, and stops the supply of the given potential when the second control circuit is activated.