| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To attain reduction in distortion when a minute signal is inputted in a class-D amplifier circuit. <P>SOLUTION: An up-down counter 70 outputs such a signal that a delay amount in a delay amount variable circuit 50 becomes large, and such a signal that the delay amount becomes small. Output of the both signals is usually performed alternatively or complementarily. More specifically, the delay amount is gradually increased by the former, and the delay amount is gradually reduced by the latter. Thus, widths of output pulses OutP, OutM gradually increase or gradually decrease. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
