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:
Nov. 28, 2006
Filed:
Apr. 16, 2003
Thomas L. Gradishar, Boynton Beach, FL (US);
Robert Stengel, Pompano Beach, FL (US);
Thomas L. Gradishar, Boynton Beach, FL (US);
Robert Stengel, Pompano Beach, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A direct digital synthesizer () with noise shaping circuitry can comprise a ROM-less direct digital synthesizer having a quantizer () and a noise shaping loop incorporating the quantizer for shaping a quantization noise due to noise from the quantizer. The noise shaping loop can comprise a noise shaping filter () and the noise shaping loop can feed back to the noise shaping filter a difference between an input signal () to the quantizer and an output signal () from the quantizer. The ROM-less direct digital synthesizer can further include a dither () combined at an input of the quantizer.