| 摘要 |
PURPOSE:To function a player body as a radio receiver without providing a control signal output terminal by connecting a +B line and an antenna line by a DC passing element, and fetching a control signal. CONSTITUTION:A+B line supplies a +B voltage applied to a +B input terminal 3a, to an FM front end 1 and IF detecting and MPX circuit 2. Also, an antenna line supplies an FM radio signal from an antenna terminal 3f, to the FM front end 1. Also, the +B line and the antenna line are connected through a coil 14 being a DC passing element, and a control signal is fetched from the antenna terminal 3f. A radio tuner adaptor 30 is formed in this way, therefore, a player body can be functioned as a radio receiver without providing a control signal output terminal. |
