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:
Apr. 03, 2007
Filed:
Jul. 25, 2002
Applicant:
Thomas J. O'brien, East Stroudsburg, PA (US);
Inventor:
Thomas J. O'Brien, East Stroudsburg, PA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A digital modulator for driving a digital amplifier. The digital modulator has a subtractor which receives a digital input signal. A filter amplifier receives the output of the filter amplifier and is tuned to an idle frequency of the digital modulator. The digital modulator includes a delay element and a digital comparator. The digital comparator receives the output from the filter and applies it to the delay element. A feedback loop couples the output of the delay element to the subtractor.