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:
Dec. 16, 2008
Filed:
Jun. 06, 2007
Chih-min Liu, Taipei, TW;
Chih-Min Liu, Taipei, TW;
Via Technologies, Inc., Taipei, TW;
Abstract
Supply voltage level detectors are disclosed. The supply voltage level detector comprises a voltage source divider dividing a voltage source to generate a detection voltage, a bandgap reference voltage generator, a comparator comparing the detection voltage with a bandgap reference voltage generated by the bandgap reference voltage generator to determine if the voltage source is ready, a control circuit, and a forcing circuit. To ensure reliability of the comparison result, the control circuit disables the comparing device until the bandgap reference voltage is available. The forcing circuit is coupled to the output terminal of the comparing device and is controlled by the control circuit. When the comparing device is disabled, the forcing circuit forces the voltage level of the output terminal of the comparing device to a specific value indicating the voltage source is unready.