POWER AMPLIFIER DEVICE

摘要

PURPOSE: A power amplifying apparatus is provided to acquire high stability by adding resistors connected to bases of transistors. CONSTITUTION: A cutoff part(10) is connected between a signal input terminal(1b) and an amplification adjusting part(20). The cutoff part includes a plurality of capacitors(C1-Cn). The cutoff part intercepts a DC component supplied from the signal input terminal. The amplification adjusting part is connected between a bias input terminal(1a) and a circuit protecting part(30). The amplification adjusting part includes a plurality of resistors(R31-R3n). The amplification adjusting part transfers a DC bias voltage from the bias terminal to the circuit protecting part. The circuit protecting part is connected to the cutoff part, the amplification adjusting part and an amplifier(40). The amplifier amplifies the signal transferred from the circuit protecting part.