| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To control the output power of an amplification circuit without changing the input power of the amplifier in the amplification circuit having the amplifier, and to expand the adjustment range of the output power. <P>SOLUTION: A plurality of amplifiers 40m, 40n are connected in parallel for composing the amplification circuit 10. One of the amplifiers 40m, 40n connected in parallel is stopped for reducing the output power of the amplification circuit 10. Variable control is performed to a DC bias point of the operating amplifier 40m, thus further reducing the output power. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
