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207 条记录 (耗时 0.013 秒)

    Mode-switching low-noise amplifier and wide-band RF receiver
    1.
    发明授权
    Mode-switching low-noise amplifier and wide-band RF receiver 有权
    模式切换低噪声放大器和宽带射频接收器

    公开(公告)号：US08447259B2

    公开(公告)日：2013-05-21

    申请号：US12358372

    申请日：2009-01-23

    申请人： Jae-Hong Chang ,  Hyung-Ki Ahn ,  Hui-Jung Kim

    发明人： Jae-Hong Chang ,  Hyung-Ki Ahn ,  Hui-Jung Kim

    IPC分类号： H03D11/02

    CPC分类号： H04B1/18 ,  H03F3/45179

    摘要： A mode-switching LNA generally includes an input unit, an output unit and a bias voltage generator. The input unit amplifies an input signal to generate an amplified signal. The output unit receives the amplified signal from the input unit and operates either in an oscillation mode or in an amplification mode in response to a control signal to generate an output signal having a center frequency equal to a target frequency. The control signal indicates whether the center frequency of the output signal is the same as the target frequency. The bias voltage generator provides an input bias voltage to the input unit in response to the control signal, where the input bias voltage includes a first bias voltage in the amplification mode and a second bias voltage in the oscillation mode.

    摘要翻译： 模式切换LNA一般包括输入单元，输出单元和偏置电压发生器。 输入单元放大输入信号以产生放大信号。 输出单元从输入单元接收放大的信号，并响应于控制信号以振荡模式或放大模式操作，以产生具有等于目标频率的中心频率的输出信号。 控制信号表示输出信号的中心频率是否与目标频率相同。 偏置电压发生器响应于控制信号向输入单元提供输入偏置电压，其中输入偏置电压包括放大模式中的第一偏置电压和振荡模式中的第二偏置电压。

    Tuneless narrow-band super-regenerative receiver
    2.
    发明授权
    Tuneless narrow-band super-regenerative receiver 失效
    无带窄带超再生接收机

    公开(公告)号：US06904101B1

    公开(公告)日：2005-06-07

    申请号：US09506043

    申请日：2000-02-17

    申请人： Qingfeng Tang

    发明人： Qingfeng Tang

    IPC分类号： H03D11/02 ,  H03D11/06 ,  H04B1/30 ,  H04B1/16

    CPC分类号： H03D11/06 ,  H03D11/02 ,  H04B1/30

    摘要： A super-regenerative receiver is provided with a regenerative oscillator controlled by a frequency sweep circuit to control the bandwidth at which the receiver can receive a signal. A quench control circuit controls both the regenerative oscillator and the frequency sweeping circuit to “turn on” at the same time. The frequency sweep circuit forces the regenerative oscillator to function as a center frequency movable bandpass filter allowing the receiver to automatically tune to the actual transmitter frequency ftx to provide the best reception. This allows the receiver/filter bandwidth to be very narrow. The receiver operates as an amplitude detector, as well as a frequency or phase detector, thereby allowing the same receiver to detect AM (ASK) signals and FM or FSK signals without adding a frequency discriminator.

    摘要翻译： 超再生接收机设置有由频率扫描电路控制的再生振荡器，以控制接收机可以接收信号的带宽。 淬火控制电路同时控制再生振荡器和扫频电路“同时”。 频率扫描电路迫使再生振荡器用作中心频率可移动带通滤波器，允许接收机自动调谐到实际的发射机频率f x tx，以提供最佳的接收。 这允许接收器/滤波器带宽非常窄。 接收器作为幅度检测器以及频率或相位检测器工作，从而允许相同的接收机在不添加鉴频器的情况下检测AM（ASK）信号和FM或FSK信号。