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:
Oct. 16, 2001
Filed:
Dec. 23, 1999
Applicant:
Inventors:
Stuart W. Pullen, Raleigh, NC (US);
John Ulrick, Woodland Hills, CA (US);
Michael M. Walters, Apex, NC (US);
Assignee:
Red Chip Company Limited, Tortola, VG;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 3/38 ; H03F 2/100 ; H03F 3/217 ; H02M 1/12 ;
U.S. Cl.
CPC ...
H03F 3/38 ; H03F 2/100 ; H03F 3/217 ; H02M 1/12 ;
Abstract
An output stage for a class D amplifier reduces distortion and EMI, and greatly improves the efficiency. The output stage employs a combination of techniques including a soft switching network, multiple output inductors and beads to achieve, a high power full range class D amplifier that is complies with all FCC and CE specifications with greater than 90% efficiency at ⅓ power.