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. 26, 2005
Filed:
Jan. 23, 2002
Koji Kato, Nagoya, JP;
Takayuki Aono, Toyoake, JP;
Koji Kato, Nagoya, JP;
Takayuki Aono, Toyoake, JP;
Denso Corporation, Kariya, JP;
Abstract
A calculator calculates an approximate value of a function Y=log (1+e) using input data x. In the calculator, a decoder outputs m-bit data that represents a value corresponding to the slope of a straight line, and further outputs intercept data of the straight line. The straight line interpolates the function Y=log (1+e) for an interval that includes the input data x as an X-value, and has a slope of −2. The intercept data represents Y-intercept of the straight line. A shifter shifts the input data x by |n| bits based on the m-bit data, and provides the resultant value as first term data. An adder generates the sum of the first term data and the intercept data, and outputs the generated sum as an approximate value of the function log Y=(1+e)