High frequency amplifier and control
    2.
    发明公开
    High frequency amplifier and control 失效
    Hochfrequenzverstärkerund Steuerung

    公开(公告)号:EP0789451A1

    公开(公告)日:1997-08-13

    申请号:EP97101439.4

    申请日:1997-01-30

    IPC分类号: H03F1/30 H03F1/52

    CPC分类号: H03F1/523 H03F1/305

    摘要: A monolithic RF amplifier circuit (10) suitable for use in the 0.8-2 GHz frequency range comprises, on-chip (12'), a gateable oscillator (24) running at about 2-5 times the amplifier input frequency or higher, coupled to a rectifier (30) and a low pass filter (34) for producing a DC signal which is fed via a bias/gain control circuit (46) to a bias / gain inputs (56, 58) of one or more amplification stages (60, 62) (e.g. GaAs FET) to provide bias therefore to ensure safe operation, and a priority control circuit (42) responsive to the bias. The priority control circuit (42) operates a power switch (18) that couples the amplification stages (60, 62) to a power supply, only when bias is present on their bias/gain inputs (56, 58) This protects the amplification stages (60, 62) against overcurrent operation. A separate external port (68) to the bias / gain control circuit (46) adjusts the magnitude of the bias to permit amplifier gain and power output to be adjusted. By gating the oscillator ON and OFF, high speed burst mode operation of the amplifier is achieved.

    摘要翻译: 适用于0.8-2GHz频率范围的单片RF放大器电路(10)包括片上(12'),以大约2-5倍放大器输入频率或更高频率运行的可选择振荡器(24),耦合 用于产生经由偏置/增益控制电路(46)馈送到一个或多个放大级的偏置/增益输入(56,58)的DC信号的整流器(30)和低通滤波器(34) (例如GaAs FET),以提供偏置以确保安全操作,以及响应偏压的优先控制电路(42)。 优先级控制电路(42)只有在偏置/偏置存在于它们的偏置/增益输入(56,58)上时才将功率开关18连接到电源上。这保护了放大级 (60,62)防过电流操作。 与偏置/增益控制电路(46)的单独的外部端口(68)调整偏置的大小以允许调整放大器增益和功率输出。 通过选通振荡器的ON和OFF,实现了放大器的高速脉冲串模式操作。