HIGH FREQUENCY POWER AMPLIFIER

摘要

PROBLEM TO BE SOLVED: To improve the linearity of a high frequency power amplifier employing a bipolar transistor in high output operation. SOLUTION: An impedance circuit 12 is connected with the base terminal of a bias supply transistor and a resistor 5 for suppressing current runaway is connected through the impedance circuit 12 thus supplying a base bias. Linearity of a power amplifier can be improved by regulating the high frequency current waveform being injected into the resistor 5 by the impedance circuit 12 and reducing voltage drop across the resistor 5. COPYRIGHT: (C)2006,JPO&NCIPI