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:
Oct. 27, 2009
Filed:
May. 28, 2008
Applicants:
Wenbo Tian, Beijing, CN;
Hang Yin, Beijing, CN;
Wang Zhao, Beijing, CN;
Inventors:
Assignee:
Vimicro Corporation, Beijing, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 19/00 (2006.01); G01R 31/08 (2006.01); G01R 27/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A scan mode is used in a voltage detection circuit. An oscillator in the circuit is always on and a system including the voltage detection circuit detects various abnormal conditions, such as overcharging, overdischarging and overcurrent one by one for some clocks. To reduce the power consumption, the voltage detection circuit is turned on only once for several clocks. The on-time is very short and lasts about only one tenth of a clock cycle time. In other times, the voltage detection circuit is turned off to save power consumption.