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:
May. 02, 1995
Filed:
Oct. 20, 1992
Applicant:
Inventors:
Michael V Cordoba, Colorado Springs, CO (US);
Kim C Hardee, Colorado Springs, CO (US);
Assignees:
United Memories, Inc., Colorado Springs, CO (US);
Nippon Steel Semiconductor Corp., Chiba, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
327536 ; 327537 ; 327534 ;
Abstract
A high efficiency charge pump for low and wide voltage ranges. The charge pump includes main and secondary charge pumps, the secondary charge pump is employed to avoid the Vt.sub.N drop that the main charge pump exhibits. The secondary charge pump allows the main charge pump to pump to a theoretical maximum of 2 VCC, while maintaining an efficiency close to 40%.