| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric circuit capable of preventing a noise generated in another electrical apparatus from continuously entering into electrical equipment through a power supply circuit, when a power supply switch is to be turned on. <P>SOLUTION: The electric circuit is provided with a main functional power supply circuit 4 to be opened/closed with a power supply switch 3 and a continuous power supply circuit 5 which is always energized, as power supply circuits for connecting a battery 1 as a power supply and a radio 2 to be driven with the battery 1. Another electrical apparatus 6 generating a noise is connected to the main functional power supply circuit 4, in a state where it works when the power supply switch 3 is turned on. On the condition that this circuit be provided, a coil 14 of a relay 13 is connected to the main functional power supply circuit 4, a relay contact point 15 is provided on the continuous power supply circuit 5, and the power supply circuit 5 is interrupted when the power supply switch 3 is turned on. <P>COPYRIGHT: (C)2008,JPO&INPIT |
