Patent ID: 9083402
Filing Date: 2015-07-14
Classification: H03F,H04B,H04L

Abstract:
1. A high frequency circuit comprising: a power amplifier circuit configured to amplify a signal received by a signal transmission terminal and output it as a transmission signal; a low noise amplifier circuit configured to amplify a reception signal received by an antenna terminal and output said reception signal after amplification to a reception terminal; a connection switching circuit configured to switch a connection between said antenna terminal and said power amplifier circuit and a connection between said antenna terminal and said low noise amplifier circuit in response to a first control signal; a bypass circuit configured to form a bypass between said connection switching circuit and said reception terminal to bypass said low noise amplifier circuit in response to a second control signal; and an attenuation unit provided on a transfer line for transferring said reception signal, said attenuation unit including a plurality of attenuation circuits, said plurality of attenuation circuits including said second attenuation circuit attenuating said branch signal together with said first attenuation circuit in response to said second control signal in the case where said antenna terminal is electrically connected to said power amplifier circuit by said connection switching circuit.