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. 29, 2002
Filed:
Oct. 26, 1999
Applicant:
Inventor:
Stephen F. Ulbrich, Anaheim Hills, CA (US);
Assignee:
Integrated Power Technologies, Ltd., Anaheim Hills, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/38 ; H03F 3/217 ;
U.S. Cl.
CPC ...
H03F 3/38 ; H03F 3/217 ;
Abstract
A switch mode power amplifier circuit apparatus comprises a fixed gain amplifier, modulator and a filter circuit electrically configured so as to direct a feedback signal for reducing clock ripple and improving signal fidelity at an output takeoff point in the amplifier circuit. An amplifier output is directed to the modulator and a modulator output is directed into an inductor of the filter circuit. The feedback signal is directed from the filter circuit to an amplifier input.