AMPLIFIER, RADIO COMMUNICATION DEVICE, AND LOAD CHANGER

摘要

PROBLEM TO BE SOLVED: To provide a new load changer.SOLUTION: An amplification circuit comprises: an amplifier for amplifying a signal; and a load changer 5001 connecting to an output side of the amplifier. The load changer 5001 comprises: a plurality of transmission lines 5011, 5012 connected in parallel; and a first shunt circuit 5030 connected to some midpoint of one or more of a plurality of the transmission lines connected in parallel. One or more of a plurality of control elements 5021 in which an element condition is changed due to a control signal, is provided. The first shunt circuit 5030 comprises a control element 5021 in which an element condition is changed due to a control signal. The control element 5021 changes an impedance of the load changer 5001 due to a change of the element condition.