| 摘要 |
PROBLEM TO BE SOLVED: To decrease the number of connection wires to be connected to the speaker equipment by sending a synthesis signal between an audio signal and a power supply DC voltage signal from the processing unit main body and allowing the speaker equipment to separate the synthesis signal into the DC voltage signal and the audio signal so as to use them. SOLUTION: An AC power is received by the information processing unit main body 1 through an AC line 11, a conversion circuit 30 converts the AC power into a DC power and it is fed to each required section via a DC line 31. An audio signal produced by an audio circuit 20 is separated from a power supply circuit by an inductor L of a synthesis circuit 40 and synthesized with a DC voltage and the synthesized signal is fed to a speaker equipment 9 via a synthesis signal line 41. A separator circuit 50 separates the audio signal by the inductor L and the separated audio signal is fed to an amplifier circuit 70 via an audio line 51. The DC power part passes through the inductor L and given to a voltage stabilizing circuit 60 via a DC line 52 and the voltage is stabilized into a regulated voltage required for the amplifier circuit 70 and an output circuit 80. The amplifier circuit 70 and the output circuit 80 amplify and output the audio signal. |
