Low Noise Amplifier and Integrated Circuit Device for Low Noise Amplifier

摘要

PURPOSE: A low noise amplifier and low noise amplifier integrated circuit device are provided to control the amplification degree of a low noise amplifier integrated circuit device by using an external device. CONSTITUTION: A low noise amplifier integrated circuit device(200) includes a plurality of capacitors and a plurality of inductors. The inductor performs a function for blocking the inflow of a radio frequency signal to a bias input unit(218). The bias input unit inputs the bias voltage from the outside. The inputted bias voltage is applied to an amplification module, a first switching module, and a second switching module. The second switching module conducts an electrical path between an RF out port(216) and a second outer port(212). The first switching module conducts the electrical path between a bypass line and an RF input port. The bias input part is connected to the anode of the first diode. One end of the bypass line is connected to the cathode of the second diode.