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:
Feb. 25, 2003
Filed:
Jun. 28, 2001
Kimiaki Ando, Kanagawa, JP;
Hiroki Shinde, Kanagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An amplitude detecting circuit ( ) includes a simple digital filter ( ) having a structure corresponding to a part where the energy is concentrated in the full impulse response of a signal processing digital filter ( ). Concretely, for example, the amplitude detecting circuit ( ) (simple digital filter ( )) includes only four central taps having coefficients of large absolute values and considerably affecting on the output amplitude among sixteen taps of the signal processing digital filter ( ). By the amplitude detecting circuit ( ), the amplitude of an output signal of the signal processing digital filter ( ) can approximately be detected.