Device for amplifying audio signal by digital circuit amplifier and reproduction by one or multiple loudspeaker elements, has digital circuit amplifier whose regulating notch is provided with rectified unstabilized supply voltage

摘要

The device has a digital circuit amplifier whose circuit stage (6) is provided with a rectified unstabilized supply voltage (9). A pulse modulator (5) is inserted in the circuit amplifier, which integrates a differential input. The differential input is obtained from the unamplified audio signal and a reference signal. A control signal (15) is produced by a hysteresis element for controlling the circuit stage. The reference signal is derived from an amplified switch signal.