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    Apparatus for receiving signals in plural frequency bands
    1.
    发明授权
    Apparatus for receiving signals in plural frequency bands 失效
    用于在多个频带中接收信号的装置

    公开(公告)号：US4181890A

    公开(公告)日：1980-01-01

    申请号：US923621

    申请日：1978-07-11

    申请人： Kenji Yamamoto

    发明人： Kenji Yamamoto

    IPC分类号： B60J7/10 ,  B60J7/04 ,  B60J7/08 ,  B60J7/185 ,  H03D5/00 ,  H03J3/08 ,  H03J5/00 ,  H03J5/02 ,  H03J5/26 ,  H03J7/18 ,  H04B1/16 ,  H04B1/26 ,  H04B1/28

    CPC分类号： H03D5/00 ,  H03J3/08 ,  H03J5/0272 ,  H03J5/26 ,  H04B1/16

    摘要： Radio receiving apparatus for receiving signals in plural frequency bands. Plural signal processing channels are provided, each channel being associated with a respective frequency band and each being tunable to different frequencies within its associated band to derive information signals when tuned to broadcast frequencies. Depending upon which of the signal processing channels is tuned to a broadcast frequency, a controllable switch connects that channel to an output circuit so as to supply the derived information signals thereto. A pulse generator generates intermittent pulse signals when the tuning condition of at least one of the signal processing channels is changed. These pulse signals are used to sample the tuning condition of that signal processing channel to determine if that channel is tuned to a broadcast frequency. A switch control circuit controls the switch to connect to the output circuit the particular signal processing channel which is tuned to a broadcast frequency.

    摘要翻译： 用于在多个频带中接收信号的无线电接收装置。 提供了多个信号处理信道，每个信道与相应的频带相关联，并且每个信道可调谐到其相关频带内的不同频率，以在调谐到广播频率时导出信息信号。 根据哪个信号处理通道调谐到广播频率，可控开关将该通道连接到输出电路，以便将导出的信息信号提供给输出电路。 当信号处理通道中的至少一个的调谐条件改变时，脉冲发生器产生间歇脉冲信号。 这些脉冲信号用于对该信号处理通道的调谐条件进行采样，以确定该通道是否被调谐到广播频率。 开关控制电路控制开关以将调谐到广播频率的特定信号处理信道连接到输出电路。

    Comb data generation
    4.
    发明授权
    Comb data generation 失效
    梳数据生成

    公开(公告)号：US5369373A

    公开(公告)日：1994-11-29

    申请号：US961986

    申请日：1992-10-16

    申请人： George F. Nelson ,  David P. Andersen

    发明人： George F. Nelson ,  David P. Andersen

    IPC分类号： G01R31/28 ,  H03B19/16 ,  H03J5/26 ,  H03H19/00

    CPC分类号： H03J5/26 ,  G01R31/2841 ,  H03B19/16

    摘要： A sine wave oscillator provides an input signal to a step-recovery diode (SRD). The SRD produces a wideband series of harmonics of the frequency of the sine wave oscillator that are represented as "lines" in a power r.f. frequency plot. The output of the SRD is supplied to one or more bandpass filters or lowpass filters which provide selection windows so that only a specified number of harmonic lines are passed within a selection window. These specified harmonic lines are then coupled to one or more high speed input switches which are coupled to one or more high speed selection switches. The high speed selection switches are each coupled to a separate bandpass filter that is tuned to a different bandpass frequency range. Each bandpass filter corresponds to one or to several adjacent lines of the selection windows. The selection switches are connected so that various ones of them may be turned on to form either selective parallel or serial combinations, or even simultaneous parallel/serial compositions, of the frequency line components under the control of a digital switch controller. The output of the bandpass channel filters are coupled to a broadband output r.f. amplifier so chat transmission of the desired output signal may be made from the amplifier either over a wire or by wireless transmission. An amplitude level controller for limiting the amplitudes of selected frequency lines and a phase modulator for phase-modulating the output frequency line components are optional features.

    摘要翻译： 正弦波振荡器向步进恢复二极管（SRD）提供输入信号。 SRD产生在功率r.f中表示为“线”的正弦波振荡器的频率的宽带系列谐波。 频率图。 SRD的输出被提供给提供选择窗口的一个或多个带通滤波器或低通滤波器，使得在选择窗口内仅传递指定数量的谐波线。 这些指定的谐波线然后被耦合到耦合到一个或多个高速选择开关的一个或多个高速输入开关。 高速选择开关各自耦合到单独的带通滤波器，其被调谐到不同的带通频率范围。 每个带通滤波器对应于选择窗口的一个或多个相邻行。 选择开关被连接，使得它们中的各个可以被接通以形成在数字开关控制器的控制下的频率线组件的选择性并行或串联组合，或甚至同时并行/串联组合。 带通信道滤波器的输出耦合到宽带输出r.f。 放大器可以通过线路或通过无线传输从放大器进行期望的输出信号的聊天传输。 用于限制所选频率线的幅度的幅度电平控制器和用于相位调制输出频率线分量的相位调制器是可选特征。