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发明公开
CN106603053A 具有改进偏置电路的射频开关电路 无效 - 驳回

具有改进偏置电路的射频开关电路
摘要：
本发明揭露了一种具有改进偏置电路的射频开关电路，其包括：第一射频端、第二射频端、第一电容、第二电容；射频开关，其包括源极、漏极、栅极以及体端，源极经过第一电容与第一射频端耦接，漏极经过第二电容与第二射频端耦接，偏置电路，其基于电池电压提供第一偏置电压、第二偏置电压和第三偏置电压，第一偏置电压大于第二偏置电压，第二偏置电压大于第三偏置电压，其中，第二偏置电压被耦接至射频开关的源极以及漏极，在需要控制射频开关导通时，第一偏置电压被耦接至射频开关的栅极，第二偏置电压被耦接至射频开关的体端，在需要控制射频开关截止时，第三偏置电压被耦接至射频开关的栅极和体端。这样可以节省芯片面积，降低成本。
摘要（英）：

The present invention discloses a radio frequency switching circuit with an improved bias circuit. The radio frequency switching circuit comprises a first radio frequency end, a second radio frequency end, a first capacitor, a second capacitor, a radio frequency switch and a bias circuit; the radio frequency switch includes a source, a drain, a gate and an end body, wherein the source is coupled to the first radio frequency end through the first capacitor, the drain is coupled to the second radio frequency end through the second capacitor; and the bias circuit provides first bias voltage, second bias voltage and third bias voltage based on battery voltage, wherein the first bias voltage is larger than the second bias voltage, the second bias voltage is larger than the third bias voltage, and the second bias voltage is coupled to the source and drain of the radio frequency switch; when the radio frequency switch is required to be controlled to be switched on, the first bias voltage is coupled to the gate of the radio frequency switch, and the second bias voltage is coupled to the end body end of the radio frequency switch; and when the radio frequency switch is required to be controlled to be switched off, the third bias voltage is coupled to the gate and end body of the radio frequency switch. Thus, the area of a chip can be decreased, and costs can be reduced.

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