| 摘要 |
PROBLEM TO BE SOLVED: To prevent the deterioration in sound quality by correcting distortion in a switching circuit. SOLUTION: During correcting, correction is performed so that the center of a sampling period may coincide with power center. S4 having pulse width corresponding to double precision of S2 showing pulse width per 1/2 period of a sampling clock is generated, and S5 having H side signals or L side signals which continue before and after a point of time of 1/2 period of the sampling clock as a center is generated in accordance with S4. S2 is corrected by S9 at a rise that corresponds to a difference between S7 and S2 at a rise from a rise of S5 to a point of time of 1/2 period of the sampling clock to be S3 for generation of pulse width of a rise of the next S4. S2 is corrected by S9 at the rise that corresponds to the difference between S7 and S2 at a rise from a point of time of 1/2 period of the sampling clock to a fall of S5 to be S3 for generation of pulse width of a fall of the next S4. COPYRIGHT: (C)2008,JPO&INPIT
|
