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. 27, 2003
Filed:
Dec. 27, 2001
William G. J. Schofield, North Andover, MA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
A multistage scrambler for a digital to analog converter having a non-ideal transfer function resulting from an error function which causes harmonic distortion includes a first shuffling network having a first input for receiving digital data and a first output, the first shuffling network including a first set of data switches; a first sequence generator for selectively interconnecting the first set of data switches to reorder at the first output the digital data received at the first input to reduce the harmonic distortion to lower magnitude colored noise; a second shuffling network having a second input for receiving the reordered digital data from the first output and a second output, the second shuffling network including a second set of data switches; and a second sequence generator for selectively interconnecting the second set of data switches to reorder at the second output the digital data received at the second input to transform the colored noise toward lower power white noise.