LOW-COST ACOUSTIC-APPARATUS SYSTEM, AND DESIGN METHOD THEREFOR

摘要

A low cost sound instrument system is disclosed, which includes a non-insulation rectification unit which rectifies an AC input voltage into a DC voltage in a non-insulated state; an am¬ plification block which amplifies an audio signal and outputs to a speaker by using a DC voltage rectified by the non-insulation rectification unit as an amplification voltage source; a sub-power unit which voltage-insulates the AC input voltage using an insulation transformer; an audio block which is driven by a voltage provided from the sub-power unit for thereby generating an audio signal; an audio signal transfer unit which insulates the audio signal generated from the audio block and transfers to the amplification block; and an insulation transformation unit of a previous block of the speaker.