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    • 3. 发明公开
    • RF switch gate control
    • HF-Schaltergateansteuerung
    • EP2775622A1
    • 2014-09-10
    • EP14157558.9
    • 2014-03-04
    • International Rectifier Corporation
    • Briere, Michael A.
    • H03K17/693H04B1/48H03K17/06
    • H03K17/162H03K17/693H03K2017/066H03K2217/0054
    • In one implementation, a switching circuit 300 includes a pass switch 306a, 306b, including group III-V, for example III-Nitride, transistors coupled between an input 302a, 302b, of the switching circuit and an output 304 of the switching circuit. The switching circuit further includes a shunt switch 326a, 326b,configured to ground the input of the switching circuit while the pass switch is disabled. The switching circuit also includes a gate control transistor 310a, 310b, 340a, 340b configured to reduce resistance between a control terminal of the pass switch and/or the shunt switch and gate of the group III-V transistor of the pass switch and/or the shunt switch so as to enable and disable the pass switch and/or shunt switch. The gate control transistor can be coupled across a gate resistor 312a, 312b, 31c, 312d of the pass switch and/or the shunt switch. The gate control transistor can reduce the resistance in order to lower the OFF state impedance of the pass switch and/or the shunt switch.
    • 在一个实现中,开关电路300包括通过开关306a,306b,其包括III-V族,例如III-Nitride,耦合在开关电路的输入端302a,302b和开关电路的输出端304之间的晶体管。 开关电路还包括分路开关326a,326b,其配置成在通路开关被禁用时将开关电路的输入接地。 开关电路还包括栅极控制晶体管310a,310b,340a,340b,其被配置为降低通路开关的控制端和/或并联开关与通过开关的III-V晶体管的栅极之间的电阻和/或 分流开关,以便启用和禁用通过开关和/或并联开关。 栅极控制晶体管可以跨过通路开关和/或并联开关的栅极电阻器312a,312b,31c,312d耦合。 栅极控制晶体管可以减小电阻以降低通路开关和/或并联开关的截止状态阻抗。