| 摘要 |
PROBLEM TO BE SOLVED: To lengthen a mute time when a digital amplifier continuously detects an overcurrent.SOLUTION: A counter circuit 3, connected with an overcurrent detection terminal OUT, counts the number of voltage outputs from a digital amplifier 100. When the number of counts reaches a predetermined number, a potential outputs a high-level voltage. A variation circuit 4, connected with an output of a counter circuit 3, increases a current consumption between the floating ground FGND and a negative power supply -V, depending on whether a potential output by the counter 3 is a high-level voltage. |
