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:
Jun. 30, 2009
Filed:
Nov. 22, 2006
Cheng-sung Chen, Dadu Township, Taichung County, TW;
Wei-hsuan Huang, Taoyuan, TW;
Cheng-Sung Chen, Dadu Township, Taichung County, TW;
Wei-Hsuan Huang, Taoyuan, TW;
System General Corp., Taipei Hsien, TW;
Abstract
The present invention provides a driving circuit. It includes a plurality of current mirrors to generate a first charge current and a second charge current in response to a reference current. A switch circuit generates a driving signal in response to an input signal. A driving switch is coupled between the first charge current and the switch circuit. Once the driving switch is turned on and the level of the input signal is in high level, the switch circuit generates the driving signal, the level of the driving signal-being in high level, in response to the first charge current and the second charge current. A detection circuit generates a control signal to turn on/off the driving switch. The detection circuit turns off the driving switch to disable the first charge current after a period of delay time when the level of the driving signal is in high level.