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发明公开
CN102403990A 射频模块 有权

射频模块
摘要：
提供一种射频模块，所述射频模块可以实现高可靠性的省电模式。所述射频模块例如包括用于将发射节点耦合到天线的开关晶体管、用于将发射节点旁路到地电压的开关晶体管以及用于通过正电源电压和负电源电压实现晶体管的通断控制的电平移位电路。在发射操作模式中接收到睡眠指令时，电平移位电路首先转变到隔离操作模式，并且在经过一定时间周期后转变到睡眠模式，其中在发射操作模式中，用于将发射节点耦合到天线的晶体管导通并且用于将发射节点旁路到地电压的晶体管截止；在隔离操作模式中，用于将发射节点耦合到天线的晶体管截止并且用于将发射节点旁路到地电压的晶体管导通；在睡眠模式中，正电源电压和负电源电压被去激活。
摘要（英）：

A radio frequency module is configured to enter a power saving mode with high reliability. The radio frequency module includes, e.g., a first switch transistor for coupling a transmission node to an antenna, a second switch transistor for shunting the transmission node to a ground voltage, and a level shift circuit for performing on-off control of the first and second switch transistors by positive and negative power supply voltages. The level shift circuit, upon receiving a sleep instruction while the module is in a transmission operation mode in which the first switch transistor for coupling a transmission node to an antenna is turned on and the second switch transistor for shunting the transmission node to a ground voltage is turned off, first transitions to an isolation operation mode in which the first switch transistor for coupling a transmission node to an antenna is turned off and the second switch transistor for shunting the transmission node to a ground voltage is turned on for a first period of time, and then transitions to a sleep mode in which the positive and negative power supply voltages are deactivated.

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