| 摘要 |
PURPOSE:To change easily the frequency in excellent way by repeating a sinusoidal wave oscillating routine so as to oscillate a sinusoidal wave, allowing the 1st and 2nd coefficients to be stored in a read only memory at each desired frequency and allowing the 1st substracting value to be brought into the vicinity of a desired value at a desired time. CONSTITUTION:A prescribed initial value is stored in memory addresses 11, 12, a coefficient K is multiplied 17 with a value of an adder 15 and the result is outputted 16. That is, the value of a specific coefficient is calculated at each desired frequency in advance, stored in the read only memory together with the value of frequency as a table, and the values are read at a desired time so that a sinusoidal wave having a desired frequency and a constant amplitude is obtained easily. |
