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:
Jun. 12, 1990
Filed:
Aug. 31, 1989
Applicant:
Inventors:
Klaus Halbach, Berkeley, CA (US);
Paul Remillard, Acton, MA (US);
Assignee:
Field Effects, Acton, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323280 ; 323356 ; 330 85 ; 324309 ;
Abstract
Techniques for operating a power amplifier in driving a highly inductive load are provided. More particularly, the voltage across a coil load is integrated to obtain a signal representative of the flux and this signal is fed back as an error signal to the power amplifier to conform the instantaneous flux to the input voltage of the power amplifier. Since the power amplifier is operated in a voltage output mode and the flux is forced to conform to the input voltage, the effects of eddy currents are automatically compensated for while the power amplifier displays maximum bandwidth for pulse and sinusoidal input sequences.