| 摘要 |
PURPOSE:To give an output of the same power to a load, without requiring changeover even if the load impedance is changed into two kinds, by connecting a specific impedance element in series with an output terminal. CONSTITUTION:An output circuit where loads such as two kinds of headphones 9 having different impedance are selectively connected to an output terminal 12, is provided. Further, an element 13 having an impedance corresponding to the root of product between R1 and R2, where R1 and R2 are impedances of the loads 9, is connected in series with the output terminal 12. Thus, an output voltage is divided with the element 13 and the loads 9 so that the same output power can be applied to the loads 9 independently of the impedances R1 and R2, allowing to eliminate a changeover switch for the loads and to obtain excellent performance. |
