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:
Mar. 18, 2008
Filed:
Jan. 18, 2005
Derk Reefman, Eindhoven, NL;
Adrianus Johannes Maria Van Tuijl, Eindhoven, NL;
Derk Reefman, Eindhoven, NL;
Adrianus Johannes Maria Van Tuijl, Eindhoven, NL;
NXP B.V., Eindhoven, NL;
Abstract
Consistent with an example embodiment a, DA-converter system comprises the cascade of a multi-bit sigma-delta modulator and a DA-converter. The quantization noise of the sigma-delta modulator is isolated; the isolated quantization noise is word-length reduced in a second noise shaper with frequency independent signal transfer function and the isolated word-length reduced quantization noise is subtracted from the quantization noise of said cascade. In another embodiment, the isolated quantization noise is amplified before and attenuated after the second noise shaper.