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:
Mar. 11, 2008
Filed:
Sep. 21, 2005
Kuang-feng Sung, Taichung County, TW;
Yueh-hsiu Liu, Taipei, TW;
Wei-ta Chiu, Taipei, TW;
Novatek Microelectronics Corp., Hsinchu, TW;
Abstract
A control circuit for an operational amplifier and a method thereof are provided to dynamically modulate the operational amplifier for strong driving capability and power saving. The control circuit comprises a bias unit coupled to the operational amplifier and a control unit coupled to the bias unit. The bias unit normally outputs a bias signal to bias the operational amplifier so that the operational amplifier has a first driving capability. However, when the driving capability of the operational amplifier needs to be adjusted, the control unit receives a modulating signal and outputs a control signal according to the modulating signal. When the bias unit receives the control signal, the bias unit dynamically modulates the bias signal according to the control signal, and hence the driving capability of the operational amplifier is dynamically modulated in an indirect manner.