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:
Aug. 06, 1991
Filed:
Apr. 26, 1990
Hitachi, Ltd., Tokyo, JP;
Abstract
In order to reduce undesirable output noise, an output circuit is provided which includes a first output MOSFET which is interposed between an output terminal and a first power source voltage, and a second output MOSFET which is interposed between the output terminal and a second power source voltage. In particular, in accordance with one aspect of the invention, a feedback circuit is interposed between the output terminal and the gate of the first output MOSFET or/and between the output terminal and the gate of the second output MOSFET to negatively feedback voltage to provide a gentle level change for the output voltage. In other embodiments, a short-circuit arrangement is provided which is interposed between the gate and source of the first output MOSFET or/and between the gate and source of the second output MOSFET. The short-circuit arrangement is temporarily held in a transferring state at the initial stage of a process in which the corresponding first or second output MOSFET is turned on to provide the desired gentle level change.