| 摘要 |
PURPOSE:To prevent flowing of an excess current in the case of grounding or battery short-circuit with respect to the feeding system applying a power supply voltage from a ground potential side of an amplifier to a battery potential side or from the battery potential side to the ground potential side at a prescribed level in a sliding state. CONSTITUTION:When an amplifier receives a power supply voltage from a ground potential side to a battery potential side at a prescribed level in a slide state, a potential change due to grounding of an output side of the amplifier is detected and the power supply voltage fed to the amplifier is subjected to slide control to the a ground potential side based on the detection of a change in the potential, and when the amplifier receives the power supply voltage from the battery potential side to the ground potential side at a prescribed level in a sliding state, a change in the potential due to battery short-circuit of the output side of the amplifier is detected and the power supply voltage fed to the amplifier is subjected to slide control to the battery potential side based on the detection of the change in the potential. |
