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:
Jul. 14, 1998
Filed:
Sep. 19, 1995
Kazuya Yamanaka, Itami, JP;
Sumitaka Takeuchi, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
It is an object of the present invention to simplify a multiplier so as to reduce the circuit scale of a digital filter which uses a large number of multipliers. Outputs of a Booth decoder 4 are stored in registers 5.sub.1 -5.sub.(n+1)/2 provided corresponding to partial product generating circuits 106.sub.1 -106.sub.(n+1)2. By providing control signals from the registers 5.sub.1 -5.sub.(n+1)/2 to the partial product generating circuits 106.sub.1 -106.sub.(n+1)/2, the Booth decoder 4 is made common. The number of Booth decoders which have conventionally been provided in a one-to-one correspondence with the partial product generating circuits can be reduced to one and the multiplier can be simplified.