| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve efficiency not only during middle power operation but also during maximum output power operation, to suppress power consumption to extend a real use time, to reduce limitations for miniaturization of a mobile radio communication terminal, and to reduce constraints in a casing design or structure. <P>SOLUTION: If a requested transmission power is near a maximum transmission power, both first and second path changeover switches 21 and 27 are switched to the side of contacts a, a to be switched. Thus, a first path whereon a first reception band block filter 25 is disposed, is formed between a first amplifier 23 and a second amplifier 29. If the requested transmission power is a middle power or less, both the first and second path changeover switches 21 and 27 are switched to the side of contacts b, b to be switched. Thus, a second path to which a second reception band block filter 26 and the second amplifier 29 are connected, is formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
