| 摘要 |
PURPOSE:To receive a specified frequency signal by only a switching operation by providing a tuning circuit whose tuning frequency is variable and fixed, on a receiver, so that a transmission to the variable or fixed tuning circuit of an input signal can be switched. CONSTITUTION:A selecting changeover switch 13 is placed so that one end is connected to an antenna 1 through a coil L, and the other end is connected to one of a variable coil 3, a tuning coil 23 having constant inductance for receiving a traffic information, and a tuning coil 25 having constant inductance for receiving an emergency information. In a state that the selecting changeover switch 13 is connected to the variable coil 3, and commercial broad-casting, etc. are received, in case of receiving traffic information or emergency information, the selecting changeover switch 13 is operated so as to be connected to the tuning coil 23 or 25. |
