Bias circuit for radio frequency switch and radio frequency communication device

The utility model discloses a biasing circuit for a radio frequency switch and a radio frequency communication device. The biasing circuit comprises a control circuit, an oscillator and a charge pump,the oscillator is set to output a clock signal to the charge pump; the charge pump is set to output a bias signal according to the clock signal so as to enable the radio frequency switch to work; andthe control circuit is set to control the oscillator to output a clock signal with frequency and/or voltage amplitude corresponding to a specified channel when detecting that the specified channel ofthe radio frequency switch is conducted, and/or control the charge pump to output a bias signal with voltage amplitude and/or current corresponding to the specified channel. 本实用新型公开了一种用于射频开关的偏置电路、及射频通信装置，该偏置电路包括控制电路、振荡器、及电荷泵；振荡器被设置为输出时钟信号至电荷泵；电荷泵被设置为根据时钟信号输出偏置信号，以供射频开关工作；控制电路被设置为检测到射频开关的指定通道导通时，控制振荡器输出与指定通道对应的频率和/或电压幅度的时钟信号，和/或，控制电荷泵输出与指定通道对应的电压幅度和/或电流的偏置信号。