Arithmetic method and function arithmetic circuit for a fast...

Details Arithmetic method and function arithmetic circuit for a fast... Arithmetic method and function arithmetic circuit for a fast...

2004-04-14

2009-12-15

Bullock, Jr., Lewis A (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S276000, C708S400000, C708S403000, C708S404000

Reexamination Certificate

active

07634524

ABSTRACT:
A cyclic equation setting unit transforms and sets a Taylor series equation for calculating a sine function into a single cyclic equation common to terms of the Taylor series equation, the single cyclic equation having a new known number Q that is defined by multiplying a known number Q and the square of a variable X, shifting the result by a shift number S and then adding a constant K thereto. An adjustment unit adjusts and prepares the shift number S such that within a variation range of the variable X the variable X has a maximum value 1 with the constant K being not greater than 1. A cyclic equation executing unit inputs and converts angle information i to the variable X, and executing the cyclic equation in sequence from higher order term to lower order term for the number of terms of the Taylor series equation to derive a sine function of the angle information i.

REFERENCES:
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patent: 4905177 (1990-02-01), Weaver et al.
patent: 6363405 (2002-03-01), Loginov
patent: 6-19955 (1994-01-01), None
patent: 10-214176 (1998-08-01), None
patent: WO 8906838 (1989-07-01), None

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