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    • 4. 发明申请
    • High frequency power amplifier circuit and electric component for high frequency power amplifier
    • 高频功率放大器电路和高频功率放大器电气元件
    • US20060066398A1
    • 2006-03-30
    • US11227109
    • 2005-09-16
    • Hitoshi AkamineMasahiro TsuchiyaKyoichi TakahashiKazuhiro Koshio
    • Hitoshi AkamineMasahiro TsuchiyaKyoichi TakahashiKazuhiro Koshio
    • H03G3/20
    • H03F3/191H03F1/30H03F1/32H03G1/007H03G3/004H03G3/3047H03G2201/103H03G2201/206H03G2201/307H03G2201/40
    • In a high frequency power amplifier circuit in which bias voltages are applied to the transistors for amplification by current mirroring, this invention enables preventing waveform distortion near the peak output power level by allowing sufficient idle currents to flow through the transistors for amplification, while enhancing the power efficiency in a low output power region. The power amplifier includes a detection circuit comprising a transistor for detection which receives the AC component of an input signal to the last-stage transistor for amplification at its control terminal, a current mirror circuit which mirrors current flowing through that transistor, and a current-voltage conversion means which converts current flowing in the slave side of the current mirror circuit into a voltage. In the detection circuit, a voltage from a bias circuit for generating the bias voltages for the transistors for amplification is applied to the control terminal of the transistor for detection and output of the detection circuit is applied to the control terminal of the last-stage transistor for amplification.
    • 在通过电流镜像将偏置电压施加到晶体管以进行放大的高频功率放大器电路中,本发明能够通过允许足够的空闲电流流过晶体管进行放大,从而防止峰值输出功率电平附近的波形失真,同时增强 低输出功率区域的功率效率。 功率放大器包括检测电路,该检测电路包括用于检测的晶体管,其将用于在其控制端子处放大的最后级晶体管的输入信号的AC分量接收;反射电流流过该晶体管的电流镜电路, 电压转换装置,其将在电流镜电路的从侧中流动的电流转换成电压。 在检测电路中,用于产生用于放大的晶体管的偏置电压的偏置电路的电压被施加到用于检测的晶体管的控制端,并且检测电路的输出被施加到最后级晶体管的控制端 用于扩增。
    • 5. 发明授权
    • High frequency power amplifier electric parts and radio telecommunication system
    • 高频功率放大器电器零件和无线电通信系统
    • US06919762B2
    • 2005-07-19
    • US10722532
    • 2003-11-28
    • Hitoshi AkamineKyoichi TakahashiMasahiro Tsuchiya
    • Hitoshi AkamineKyoichi TakahashiMasahiro Tsuchiya
    • H03F3/68H03F1/02H03F1/32H03F3/24H03G3/30H03G5/16
    • H03G3/3047H03F1/0272H03F2200/294H03F2200/372
    • The present invention provides a high frequency power amplifier of a multi-stage configuration in which a plurality of transistors for power amplification are cascaded, with reduced distortion of a signal in a region where an output power level is low and improved power efficiency. In a high frequency power amplifier electric part in which a plurality of transistors for power amplification are cascaded, a transistor for output level detection is provided whose gate terminal receives a gate input of a transistor for power amplification in the final stage via a resistive element of which resistance value is 100 Ω or less. Current detected by the transistor is converted to voltage. The voltage is compared with output control voltage by an error amplifier. Voltage according to the potential difference is applied to the gate terminals of the transistors for power amplification in the amplification stages to thereby pass idle current.
    • 本发明提供一种多级配置的高频功率放大器,其中用于功率放大的多个晶体管级联,降低输出功率电平低的区域中的信号失真并提高功率效率。 在用于功率放大的多个晶体管级联的高频功率放大器电气部件中,提供用于输出电平检测的晶体管,其栅极端子经由电阻元件的电阻元件在最终级中接收用于功率放大的晶体管的栅极输入 该电阻值为100Ω以下。 由晶体管检测的电流转换为电压。 通过误差放大器将电压与输出控制电压进行比较。 根据电位差的电压被施加到放大级中用于功率放大的晶体管的栅极端子,从而使空闲电流通过。
    • 7. 发明授权
    • High frequency power amplifier circuit and electric component for high frequency power amplifier
    • 高频功率放大器电路和高频功率放大器电气元件
    • US07271662B2
    • 2007-09-18
    • US11227109
    • 2005-09-16
    • Hitoshi AkamineMasahiro TsuchiyaKyoichi TakahashiKazuhiro Koshio
    • Hitoshi AkamineMasahiro TsuchiyaKyoichi TakahashiKazuhiro Koshio
    • H03G5/16H03F3/68
    • H03F3/191H03F1/30H03F1/32H03G1/007H03G3/004H03G3/3047H03G2201/103H03G2201/206H03G2201/307H03G2201/40
    • In a high frequency power amplifier circuit in which bias voltages are applied to the transistors for amplification by current mirroring, this invention enables preventing waveform distortion near the peak output power level by allowing sufficient idle currents to flow through the transistors for amplification, while enhancing the power efficiency in a low output power region. The power amplifier includes a detection circuit comprising a transistor for detection which receives the AC component of an input signal to the last-stage transistor for amplification at its control terminal, a current mirror circuit which mirrors current flowing through that transistor, and a current-voltage conversion means which converts current flowing in the slave side of the current mirror circuit into a voltage. In the detection circuit, a voltage from a bias circuit for generating the bias voltages for the transistors for amplification is applied to the control terminal of the transistor for detection and output of the detection circuit is applied to the control terminal of the last-stage transistor for amplification.
    • 在通过电流镜像将偏置电压施加到晶体管以进行放大的高频功率放大器电路中,本发明能够通过允许足够的空闲电流流过晶体管进行放大,从而防止峰值输出功率电平附近的波形失真,同时增强 低输出功率区域的功率效率。 功率放大器包括检测电路,该检测电路包括用于检测的晶体管,其将用于在其控制端子处放大的最后级晶体管的输入信号的AC分量接收;反射电流流过该晶体管的电流镜电路, 电压转换装置,其将在电流镜电路的从侧中流动的电流转换成电压。 在检测电路中,用于产生用于放大的晶体管的偏置电压的偏置电路的电压被施加到用于检测的晶体管的控制端,并且检测电路的输出被施加到最后级晶体管的控制端 用于扩增。