Multistage audio amplifier for amplifying audio signals in e.g. super audio compact disk player, has source selector switch with signal switching function for transferring input signals that are transferred to impedance converter stage

摘要

The amplifier has a source selector switch comprising a signal switching function for transferring input signals with low signal level over an amplifier stage. The input signals are amplified to a high intermediate signal level. The source selector switch comprises another signal switching function for transferring the input signals with high signal level. The input signals are transferred to an impedance converter stage in the latter signal switching function in an unamplified manner. A sound level potentiometer is arranged between the switch and the converter stage.