| 摘要 |
PURPOSE:To save a wasteful power consumption by connecting a capacitive loudspeaker with an output circuit for driving said capacitive loudspeaker through the serial circuit of a switching element and an inductance and connecting the capacitive loudspeaker with a power source by the second inductance tightly connected to the inductance. CONSTITUTION:Between the inversion input terminal 1c of an operation amplifier 1 and an output terminal 1e, a resistor 10 is connected and to the output terminal 1c, the base of a transistor 12 as the switching element is connected through a resistor 11. The collector of the transistor 12 is connected to appositive power source 2 and the base is also connected to the positive power source 2 through a resistor 13. The emitter of the transistor 12 is connected to the negative pole of a capacity load 8 through an inductance 14. The negative pole of the capacity load 8 is connected to the positive power source 2 through the serial circuit of the second backward wound inductance 15 tightly connected to the inductance 14 and a diode 16. In the transistor 12, only an on state and a floating state are permitted by the output of the operation amplifier 1. |
