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:
Jul. 01, 2003
Filed:
Jan. 30, 2002
Chih-Sheng Lee, Junghe, TW;
Meng-Feng Chen, Junghe, TW;
Chien-Chi Hsu, Junghe, TW;
Chien-Fa Chuang, Junghe, TW;
Micro-Star Int'l Co., Ltd., Taipei, TW;
Abstract
A power-off protection device. The device outputs operating power according to a first level signal and a second level signal, and comprises a processor, a modulating circuit, a power generating circuit, and a reference-voltage maintenance device. The processor outputs a voltage modulating signal. The circuit is coupled to the processor and the first level signal to output a voltage control signal responding to the voltage modulating signal. The power generating circuit is coupled to the second level signal and the modulating circuit for generating operating power from the second level signal according to the voltage control signal. The reference -voltage maintenance device is coupled to the first level signal and the modulating circuit to delay the drop time of the first level signal to confirm that the first level signal is higher than the second level signal when the first level signal and the second level signal are turned off.