| 摘要 |
PROBLEM TO BE SOLVED: To prevent noise in a control circuit system in the electronic device from being penetrating to a high frequency circuit (radio system). SOLUTION: A light-emitting diode (L) is provided to a printed circuit board of a data transmitter side and a photosensor (S) is provided to a printed circuit board of a data receiver side, so that they are opposed to each other when the respective printed circuit boards have a prescribed relation of position, in order to make optical communication for data transmission reception between a plurality of the printed circuit boards. Furthermore, the device is provided with a battery 12 and battery terminals that are in simultaneous contact with the two printed circuit boards, when the two printed circuit boards are assembled at a prescribed relation of position, the AF printed circuit board on which control system components are mainly mounted receives power through an inductor 20 for further supply of the power to each section, so that a noise generated from the AF printed circuit board resulting from the interrupt of a power supply line in terms of AC is prevented from being penetrated to the RF printed board on which radio system components are mainly mounted. |
