HIGH-FREQUENCY POWER AMPLIFIER

摘要

PROBLEM TO BE SOLVED: To improve linearity in high output operation in a high-frequency power amplifier using a bipolar transistor. SOLUTION: A capacitor 111 is connected between the base and the ground of a transistor 104 for supplying bias, thus reducing variations in the base voltage of the transistor 104 for supplying bias when inputting a high-frequency signal and improving linearity in the power amplifier. In the power amplifier connected in multiple stages, a bias circuit can be made common, which is useful for miniaturization. COPYRIGHT: (C)2006,JPO&NCIPI