Digital amplifier, three-value signal output method and speaker

摘要

Noise is reduced when three-value output is performed. In a digital amplifier 1, a three-value driver 18a associated with a positive electrode and a three-value driver 18b output three-value signals which are inverted to each other, and execute an output of three values on the basis of a differential output of the positive electrode and a negative electrode.

主权项

1. An audio device comprising:
a speaker main body; a plurality of digital amplifiers each of which corresponds to respective channel; and a plurality of coils, wherein each of the plurality of digital amplifiers comprises:
a positive electrode signal output circuit that is associated with a positive electrode and that outputs three-value positive signals; anda negative electrode signal output circuit that is associated with a negative electrode and that outputs negative signal which is inverted from the positive signal to be output from the positive electrode signal output circuit and which maintains in signal amplitude of the positive signal, the negative electrode signal output circuit outputting the inverted signal at a same timing as a timing of the positive signal,wherein the positive electrode signal output circuit and the negative electrode signal output circuit are connected to each of the plurality of coils, and the three-value signals that are inverted each other and that have the same amplitude are input at the same timing to each of the plurality of coils.