PURPOSE: To limit a relative error of each integral number section to a prescribed maximum value by using a conventional microprocessor and calculating an integral number of power in high speed so as to calculate an approximated value of an integral power by means of a small sized hardware.
CONSTITUTION: An integral number (x) is stored in a shift register SR1 and a counter CT2 is set initially to zero. Then the content of the SR1 is shifted by one bit to the low-order in response to the first pulse of a command signal C. Whether or not the content of the SR1 is zero is discriminated (3) and when not zero, the CT2 is advanced. When the content of the SR1 reaches zero through the repetition of the operation above, the approximated value of a power (a) to the integral number (x) is operated. The operation is calculated by using a memory 4 storing mj in advance while using each count (j) of the CT2 as an address, a memory 5 storing in advance (lj) while using each count value (j) of the CT2 as an address, a multiplier 6 multiplying the value mj and the integral number (x), and an adder 7 between the values lj and mjx. As a result, the approximated value of the power xa to the integral number is calculated.
NISHIMOTO KATSUSHI
AKITA TADASHI
| JP43013112A | ||||
| JPS519348A | 1976-01-26 |