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:
Jun. 16, 1992
Filed:
Dec. 24, 1990
Applicant:
Inventors:
Robert C Ledzius, Austin, TX (US);
James S Irwin, Paige, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341143 ; 341145 ;
Abstract
A digital signal having a plurality of bits is apportioned by the DAC into a plurality of words, at least one of which has a plurality of bits. Each of the plurality of words is then processed in an energy signal producing means, such as a .SIGMA.-.DELTA. modulator, to produce an output energy signal whose time average represents the input digital word portion. The energy output signals are then summed to provide the analog signal.