Analog/digital device for reproducing sound signal, has control circuit for closing one of switches before closing another switch, and opening former switch when reproduction device processes audio signal

摘要

The device has an analog part comprising an output stage (20) with a switch (SW1) connected in series with a power supply of the output stage. Another switch (SW2) acts on the control of the output stage for inhibiting the output stage. A control circuit (24) maintains the former switch in an open position until all the power supply voltages of the device exceed thresholds, closes the latter switch before closing the former switch, and opens the latter switch when the device processes the audio signal. An independent claim is also included for a method for powering an analog/digital device to reproduce sound signal.