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:
Aug. 29, 2000
Filed:
Aug. 11, 1998
Applicant:
Inventor:
Karl-Heinz Ideler, Spardorf, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
327588 ; 327108 ; 327423 ;
Abstract
A power amplifier has an amplifier module and a pole changer module connected to the amplifier module, and during the operation of the power amplifier an amplifier current flows in a single current direction between the amplifier module and the pole changer module. The pole changer module optionally provides the amplifier current with unchanged current direction or with reversed current direction, as output current of the power amplifier. A nuclear spin tomography apparatus contains at least one such power amplifier. Such a power amplifier exhibits the required efficiency quantitatively and qualitatively, with low outlay and low cost.