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:
Sep. 04, 2001
Filed:
Oct. 21, 1998
Hiep V. Tran, Dallas, TX (US);
Richard X. Gu, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
In a fast adaptive filter unit, an update unit replaces the multiplier unit which generates a product of the filter constant, the error signal and data signal and adding this product to a previously generated coefficient with a reduced complexity unit. The reduced complexity unit determines the sign of the product and whether the product is zero or non-zero. As a result of this determination a two bit signal is generated which is used to either increment or decrement the count in a register in the counter unit. The count held by the register is the coefficient signal, the coefficient signal being updated by each additional operation. In order to prevent the register from over-flowing, a second counter applies a signal periodically to the counter unit which decrements the magnitude of coefficient signal stored in the register by one count.