| 摘要 |
PROBLEM TO BE SOLVED: To have the excellent controllability of a current control (limitation) of a power amplifier during low power, and to broadly improve the temperature characteristics of the power amplifier during the low power. SOLUTION: An emitter of a bipolar transistor 1 for supplying a bias is connected to a base of a bipolar transistor 2 for power via a resistor 5, and the emitter of the bipolar transistor 1 for supplying the bias is connected to a collector of a transistor 3 for controlling power. Also, the emitter of the transistor 3 for controlling power is grounded via a Schottky diode 19 for temperature compensation and a resistor 15, and a power control voltage 13 is applied to the base of the transistor 3 for controlling power via a resistor 14. COPYRIGHT: (C)2006,JPO&NCIPI
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