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    • 8. 发明授权
    • Semiconductor integrated circuit and high frequency module with the same
    • 半导体集成电路与高频模块相同
    • US08159282B2
    • 2012-04-17
    • US12615525
    • 2009-11-10
    • Kaoru KatohShigeki KoyaShinichiro TakataniYasushi ShigenoAkishige NakajimaTakashi Ogawa
    • Kaoru KatohShigeki KoyaShinichiro TakataniYasushi ShigenoAkishige NakajimaTakashi Ogawa
    • H03K17/687
    • H03K17/693H03K17/063
    • The present invention is directed to reduce increase in the level of a harmonic signal of an RF (transmission) Tx output signal at the time of supplying an RF Tx signal to a bias generation circuit of an antenna switch. A semiconductor integrated circuit includes an antenna switch having a bias generation circuit, a Tx switch, and an antenna switch having a bias generation circuit, a transmitter switch, and a receiver (Rx) switch. The on/off state of a transistor of a Tx switch coupled between a Tx port and an I/O port is controlled by a Tx control bias. The on/off state of the transistors of the Rx switch coupled between the I/O port and a receiver (Rx) port is controlled by an RX control bias. A radio frequency (RF) signal input port of the bias generation circuit is coupled to the Tx port, and a negative DC output bias generated from a DC output port can be supplied to a gate control port of transistors of the Rx switch.
    • 本发明旨在减少在将RF Tx信号提供给天线开关的偏置产生电路时的RF(发送)Tx输出信号的谐波信号的电平的增加。 半导体集成电路包括具有偏置产生电路,Tx开关和具有偏置产生电路,发射器开关和接收器(Rx))开关的天线开关的天线开关。 耦合在Tx端口和I / O端口之间的Tx开关的晶体管的导通/截止状态由Tx控制偏置来控制。 耦合在I / O端口和接收器(Rx)端口之间的Rx开关的晶体管的开/关状态由RX控制偏置来控制。 偏置产生电路的射频(RF)信号输入端口耦合到Tx端口,并且可以将从DC输出端口产生的负DC输出偏压提供给Rx开关的晶体管的栅极控制端口。