| 摘要 |
<p>PURPOSE:To prevent the interruption of signal receiving and so on in the middle of the receiving of radio broadcasting and the like, even when an engine is just started to drive. CONSTITUTION:An operational power source input circuit 54, one terminal of which is connected to an accessory circuit 70, and the other of which is connected to an operational power source input terminal 56A of an audio equipment 56 (radio), and a memory backup power source circuit 57, one terminal of which is connected to a battery circuit 60, and the other terminal of which is connected to a memory backup power source terminal 56B of the audio system 56, are provided, while a circuit switch means 1 for alternatively switching and connecting the operational power source input terminal 56A to the accessory circuit 70 or to the memory backup power source circuit 57 according to the external operation, is intermediately interposed into a part of the operational power source input circuit 54.</p> |
