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. 02, 2003
Filed:
Jul. 16, 2002
Applicant:
Inventors:
James S. Zeng, Cupertino, CA (US);
Lajos Burgyan, Mountain View, CA (US);
Rendon A. Holloway, Cupertino, CA (US);
Assignee:
Fairchild Semiconductor Corporation, South Portland, ME (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/18 ; G05F 1/10 ;
U.S. Cl.
CPC ...
H02M 3/18 ; G05F 1/10 ;
Abstract
A charge pumping system capable of a forward operation mode and a reverse operation mode is provided. In forward operation mode the charge pumping system can step-up an input voltage at a ratio of ½:1 and can step-down the input voltage at a ratio of at east one of 1:1, 3:2, 2:1 and 3:1. In reverse operation mode the charge pumping system can step-down the input voltage at a ratio of 1:½and 1:1 and can step-up the input voltage at a ratio of at least one of 2:3, 1:2 and 1:3.