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:
Sep. 09, 2003
Filed:
Jul. 22, 2002
Haoran Zhang, Tucson, AZ (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A charge pump circuit is configured for suitably controlling the charging current in the charge pump capacitors. The charge pump circuit comprises an input current controlling circuit comprising a current limiting device for controlling the inrush current, and thus the charging current in the charge pump capacitors. The input current controlling circuit is configured to regulate the average voltage at the output of the current limiting device to correspond to the average voltage at the output of a pass device configured for regulating the output current. Accordingly, the total input current, and thus the charging current in the charge pump capacitors, can be suitably controlled at all times to significantly reduce the impact of any instantaneous charging currents.