| 摘要 |
PROBLEM TO BE SOLVED: To provide an amplifying circuit which is capable of enhancing current efficiency and will not cause input signal band to be restricted. SOLUTION: The amplifying circuit 20 comprises an operational amplifier 22, of which a non-inverted input is connected to the input of the amplifying circuit, and an inverted input is connected to an output of the amplification circuit; and a resistor Rsense is connected between the output of the operational amplifier 22 and the output of the amplifying circuit 20. A switch mode power supply circuit 24, of which the first and second inputs are connected to the output of the operational amplifier 22 and to the output of the amplification circuit 20, respectively, is connected to the output of the amplifying circuit via an inductor. COPYRIGHT: (C)2008,JPO&INPIT |
