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. 15, 2001
Filed:
Apr. 26, 1999
Paul D. Hendricks, Coopersburg, PA (US);
Lane A. Smith, Easton, PA (US);
Lucent Technologies, Inc., Murray Hill, NJ (US);
Abstract
A 2,order digital filter requiring only one sigma delta modulator is created by implementing (1) a 2,order feedforward term created by the cascade of two 1,order elements; (2) a 2,order feedback term created by the cascade of two 1,order elements; and (3) another 2,order feedback term created by the cascade of two more 1,order elements to eliminate the need for another sigma delta modulator to provide a 2,order filter. Thus, for the mere 'cost' of additional feedback loops, which are small in comparison with the size and complexity of another sigma delta modulator, a second sigma delta modulator is not necessary to implement a 2,order digital filter in accordance with the principles with the present invention.