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:
Aug. 23, 1988
Filed:
Oct. 08, 1985
Applicant:
Inventor:
Yoshiji Fujimoto, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G01R / ;
U.S. Cl.
CPC ...
364724 ; 364728 ;
Abstract
A digital filter for obtaining the power of a filtered signal passing through a particular frequency band for each frame (short time division) includes an auto-correlation circuit for calculating the auto-correlation function of the input signal, and a sum of products calculator for obtaining the power of the signal by multiplying a linear coefficient with the auto-correlation function for the frame and summing the products together to get the power of the filtered signal.