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:
Mar. 06, 2012
Filed:
Dec. 20, 2006
Applicants:
Frank Hagemeyer, Wedemark, DE;
Peter Himmelreich, Burgwedel, DE;
Inventors:
Frank Hagemeyer, Wedemark, DE;
Peter Himmelreich, Burgwedel, DE;
Assignee:
Sennheiser electronic GmbH & Co. KG, Wedemark, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/40 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a DC to DC converter comprising a DC to DC converter unit (DCW), a first field effect transistor (FET) for the voltage conversion, a bipolar transistor (BP) as a starting aid, and a second field effect transistor (FET) for switching-off the bipolar transistor (BP). Said bipolar transistor (BP) is mounted in parallel with the first field effect transistor (FET), and the second field effect transistor (FET) is mounted upstream of the bipolar transistor (BP).