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:
Jan. 27, 2009
Filed:
Jul. 05, 2005
Applicant:
Matthew Blaha, Holmdel, NJ (US);
Inventor:
Matthew Blaha, Holmdel, NJ (US);
Assignee:
Agere Systems Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J 1/00 (2006.01); H02J 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A series pass transistor voltage regulator is described having a main power source and an auxiliary power source. When the main power source voltage falls to a level the regulator can no longer use, the regulator seamlessly draws power from the auxiliary source. A voltage dropping circuit of two series-coupled diodes allows for a single feedback control amplifier to control the regulator's pass transistors in series with the main and auxiliary power sources.