Patent ID: 8649741
Filing Date: 2014-02-11
Classification: H03K

Abstract:
1. A radio frequency module comprising: a power amplifier circuit for amplifying a transmission radio frequency signal and outputting an amplified signal to a transmission node; a first transistor for coupling the transmission node to an antenna; a second transistor for shunting the transmission node to a first power supply voltage; and first control circuitry which generates a second power supply voltage higher than the first power supply voltage and a third power supply voltage lower than the first power supply voltage and performs on-off control of the first and second transistors by applying a control signal having a value of the second power supply voltage or the third power supply voltage to the first and second transistors, wherein: when a transmission operation mode is designated, the first control circuitry turns on the first transistor and turns off the second transistor, and when a power saving operation mode is designated after the transmission operation mode, the first control circuitry turns off the first transistor and turns on the second transistor for a first time period and then stops generation of the second and third power supply voltages.