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. 23, 1991
Filed:
Jan. 09, 1990
Sumitaka Takeuchi, Hyogo, JP;
Hiroyuki Kouno, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A multiplication processing circuit requiring no digital-analog converter includes a circuit for multiplying a digital multiplication coefficient by a digital multiplicand and outputting the result of multiplication as an analog current signal. The multiplication processing circuit includes a circuit for decoding the digital multiplication coefficient to generate one or a plurality of control signals, a circuit responsive to the digital multiplicand and to the generated control signal for generating a signal indicating, in decimal notation, the result of multiplication of the digital multiplication coefficient by the digital multiplicand, and a circuit for converting the signal indicating the result of multiplication into an analog current signal of a corresponding magnitude. Each of the control signals indicates at least one digital multiplication coefficient in decimal notation. The circuit for generating the signal indicative of the result of multiplication includes a circuit for logically processing, by logic gates, the control signal and the digital multiplicand. The logic gate circuit includes a circuit for detecting coincidence/non-coincidence between a pattern of the generated control signal and a bit pattern of the digital multiplicand, and a circuit responsive to the output of the detecting circuit for activating one of a plurality of possible signals indicating the results of multiplication.