| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor amplifying device capable of extending a band of operating frequency and miniaturizing an area of an impedance matching circuit. SOLUTION: The semiconductor amplifying device is provided with a plurality of semiconductor amplifying elements, an impedance matching circuit inserted among the semiconductor amplifying elements and connected the semiconductor amplifying elements in multi-stages, and a power source circuit for supplying a bias voltage to the respective semiconductor amplifying elements. The power supply circuit supplies higher bias voltage to a post-stage semiconductor amplifying element than the pre-stage semiconductor amplifying element. COPYRIGHT: (C)2008,JPO&INPIT
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