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:
Jan. 17, 1995
Filed:
Oct. 14, 1993
Shiro Sakiyama, Kadoma, JP;
Masakatsu Maruyama, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a direct type of finite impulse response (FIR) digital filter, direct type digital filters consisting a plurality of taps are used as a construction element of a digital filter. A pipeline structure is constructed between cascaded construction elements, and the sum and carry signals of the multi-input addition in the midst of the addition operation are transferred between cascaded construction elements. The number of gates, dissipation power, chip area and the like can be decreased as compared with a prior art inverted type digital filter. Further, a digital signal processing system such as a waveform equalizing system can be constructed using a direct type digital filter as mentioned above, and such a system includes a selector for selecting the output of the digital filter and an output in the midst of the delays in the digital filter.