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:
Jun. 13, 2006
Filed:
Dec. 18, 2000
Nobuhiko Kenmochi, Shiojisi, JP;
Nobuhiko Kenmochi, Shiojisi, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
In accordance with the invention, in a nonrecursive digital filter, the number of times each bit of input data passes through a shift register is reduced to save power. Despreading data is sent to a first shift register and a second shift register, each having a number of stages obtained by dividing the usual number of stages by two, and both shift registers alternately perform a shift operation at both edges of a shift clock. Multiplexers are provided for selecting the odd-numbered codes of reference codes stored in a reference-code register when the shift clock is in an OFF state and for selecting the even-numbered codes when the shift clock is in an ON state, and multiplexers are provided that perform the selections analogous to the above. The exclusive-OR output of the output of each stage of the first shift register and the outputs of the multiplexers, and the exclusive-OR output of the output of each stage of the second shift register, and the outputs of the multiplexers are added by the adder to obtain a correlation-strength output.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile