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:
May. 22, 2001
Filed:
Apr. 26, 1999
Applicant:
Inventors:
Birru M. Dagnachew, Sleepy Hollow, NY (US);
Engel Roza, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 3/00 ;
U.S. Cl.
CPC ...
H03M 3/00 ;
Abstract
A D/A converter (DAC) is described having interpolation means (,) and filter means. Further the D/A converter comprises a noise shaper (,) implemented as a reduced sample rate (RSR) sigma delta modulator, and controlled by clock means. To further improve the operation of the D/A converter in an advantageous embodiment of the invention the filter means are implemented as polyphase FIR filter means.