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:
Dec. 27, 2011
Filed:
Nov. 24, 2009
Applicants:
John Jude O'donnell, Clare, IE;
Frederick Carnegie Thompson, Limerick, IE;
Inventors:
John Jude O'Donnell, Clare, IE;
Frederick Carnegie Thompson, Limerick, IE;
Assignee:
MediaTek Singapore Pte. Ltd., Singapore, SG;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/66 (2006.01);
U.S. Cl.
CPC ...
Abstract
Tri-level scrambling in a digital to analog converter system is achieved by, in response to a tri-level binary code input, disabling a negative data directed scrambler circuit when the input code is in the positive cycle portion, disabling a positive data directed scrambler circuit when the input code is in the negative cycle portion and disabling both scrambler circuits upon a zero input code for reducing low level distortion due to a reversal of current during crossover between those cycles.