ELECTRONIC DEVICE

The present invention improves power supply efficiency during power line communication. This electronic device, comprising at least a portion of a constant current circuit connected to a predeterminedload, has a circuit unit K that controls the voltage to be applied to the predetermined load on the basis of a state related to the predetermined load. The circuit unit K has: a path (a path from endK1 to end K3 via a constant voltage diode D1) in which at least a portion of the voltage to be applied to the predetermined load is generated when a constant current flowing in the constant current circuit flows therein; and a field effect transistor Q1 serving as a switch unit for switching between short-circuiting the path and undoing the same. A control unit CT controls the voltage to be applied to the predetermined load by switching the state of the switch unit. 本发明提供一种在进行电力线通信的情况下使电源效率提高的电子设备。本发明涉及的电子设备包括与规定负载连接的恒定电流电路网的至少一部分，具有：电路部(K)，其基于所述规定负载相关的状态控制对该规定负载的施加电压。电路部(K)具有：路径(从端(K1)经由恒定电压二极管(D1)到达端(K3)的路径)，当在所述恒定电