| 摘要 |
PROBLEM TO BE SOLVED: To provide a power amplifier variable with respect to the operating bias point. SOLUTION: MMIC 110 has two stages of FETs 112, 113, three matching circuits 111, 113, 115 and two gate bias resistors 116, 117 integrated together. A drain bias circuit 101 and a gate bias circuit 102 are formed on a mounting board 100 and connected to drain voltage feed terminals 121, 122 and gate voltage feed terminals 123, 124, respectively. Signals are inputted to a signal input terminal 126 and outputted from a signal output terminal 127. The operating bias point is adjustable by applying a gate bias from a resistor divider utilizing a variable resistor in the gate bias circuit 102.
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