| 摘要 |
PURPOSE:To obtain easily a digital signal equivalent to an A/D-converted sine wave, by dividing one period of the sine wave into (n) equally and by writing one-period components of the crest value into a ROM and by reading out binary numbers from the ROM synchronously with the sampling frequency. CONSTITUTION:One period of the sine wave having relation 1/n to sampling frequency fs is divided into (n) equally, and the crest value of the sine wave at each of n-number time points is written as a binary number into ROM2 by one-period components. Contents of ROM2 are read out successively by the output of counter 3 which counts clocks of frequency fs. As the output of ROM2, an output is obtained which is equivalent to binary 16 bits of B1(MSB)-B16(LSB) obtained by sampling sine wave sin(2pift) of frequency (f) by frequency fs and subjecting the result to A/D conversion. |
