| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital audio signal processing device that performs appropriate mute control in a simple configuration.SOLUTION: A time constant circuit 15 receives an input of Data (a digital audio signal) supplied from an audio reproduction section 11 and moderates waveform rises/falls. A NOT gate 16 supplies an inversion of voltage logic (Hi/Low) at a junction p of the time constant circuit 15 to an AMP 13 as a mute signal. An AND gate 17 performs an AND operation on the value of the NOT gate 16 and the value of Data and supplies a signal representing a result of the AND operation as a control signal to a switch 18. The switch 18 turns on/off a connection between the time constant circuit 15 and a power supply DVDD according to the control signal from the AND gate 17. |
