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. 09, 1999
Filed:
Jun. 06, 1997
Takaaki Hoshi, Ibaraki, JP;
Matsushita Electric Iddustrial Co., Ltd., Osaka, JP;
Abstract
A circuit prevents continuation of a runaway condition in a micro-controller. When the output terminal in a C-MOS push-pull structure of the micro-controller becomes uncontrollable as a result of runaway of the micro-controller, the usually low potential of the output terminal elevates, and is used as detection signal. The detection signal is applied to the base of a detection transistor to conduct the detection transistor, resulting in the voltage of the reset terminal of the micro-controller, which is connected to the collector of the detection transistor, to become a 'LOW' level to stop the runaway condition. The port terminal voltage is set to a 'LOW' level based on the change of the reset terminal voltage which conducts the diode connected between the port terminal and the base of the detection transistor, thereby lowering the base potential of the transistor and hence the control transistor is cut off. As a result, the reset terminal of the micro-controller is returned to the normal high potential, thereby resetting the micro-controller.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile