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. 19, 1999
Filed:
Feb. 17, 1998
Applicant:
Inventor:
Hilmer Irvin Swanson, Quincy, IL (US);
Assignee:
Harris Corporation, Melbourne, FL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330 10 ; 330149 ;
Abstract
A pulse duration modulation (PDM) amplifier system having a plurality of PDM carrier signals of like frequency but unlike phase. A first pair of PDM amplifiers responds to a common modulating input signal. Each amplifier pulse duration modulates a corresponding one of the PDM carrier signals. Each PDM amplifier has an output circuit. A common filter is associated with each pair of PDM amplifiers for filtering the corresponding signals obtained from the output circuits of the pair of PDM amplifiers and providing output signals on a filter output line. The output circuit of each PDM amplifier is coupled to the common filter.