| 摘要 |
PROBLEM TO BE SOLVED: To provide an amplifier capable of increasing inductance without increasing a circuit area, and to provide a radio device. SOLUTION: The amplifier includes: a substrate; first-fourth amplifying units arranged on the substrate and amplifying an input signal and for output of the amplified signal; first-fourth inductive lines arranged on the substrate, connecting the output of the first amplifying unit to the output of the second amplifying unit, the output of the second amplifying unit to the output of the third amplifying unit, the output of the third amplifying unit to the output of the fourth amplifying unit and the output of the fourth amplifying unit to the output of the first amplifying unit, respectively, and having at least one meandering part; and a fifth inductive line which is magnetic-field coupled to the first-fourth inductive lines. COPYRIGHT: (C)2010,JPO&INPIT
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