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. 09, 2003
Filed:
Mar. 18, 2002
Thomas L. Botker, Tucson, AZ (US);
Haoran Zhang, Tucson, AZ (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A charge pump circuit is configured for continuous control of the output of the charge pump circuit through continuous use of at least one charge pump capacitor coupled with a servo amplifier. During and between both phases of operation of the charge pump circuit, the output current from the servo amplifier can be set equal to the load current through a continuous path. This servo amplifier configuration facilitates the continuous regulation of the load current, during both phases of operation, as well as in between the phases, and as a result no load current is drawn from the output capacitor, thus requiring no recharge of the output capacitor. In addition, an exemplary charge pump circuit can be configured with level-shifting capabilities, the ability to facilitate the use of lower voltage processes, and the ability to provide a large DC open loop gain and high stability. In addition, an exemplary charge pump circuit can be configured with capabilities for buck/boost operation.