Programmed timer for VTR
    3.
    发明授权
    Programmed timer for VTR 失效
    VTR编程定时器

    公开(公告)号:US4325081A

    公开(公告)日:1982-04-13

    申请号:US163297

    申请日:1980-06-26

    摘要: A programmed timer for presetting a video tape recorder for the time and reception channel when the video tape recorder starts and ends, comprising a processor circuit for processing the type of the data entered for reservation in a predetermined order, and means for sequentially displaying a procedure to be next entered each time data are entered. The operator is required to enter the necessary data simply according to the displayed procedure in order to set the desired reservation data for the programmed timer.

    摘要翻译: 一种编程定时器,用于在磁带录像机启动和结束时预设用于时间和接收通道的录像机,包括处理器电路,用于以预定顺序处理输入的数据类型,以及用于顺序显示程序的装置 每次输入数据时都要输入。 要求操作员根据显示的程序输入必要的数据,以便设定所编程定时器的预期数据。

    Relay control circuit
    4.
    发明授权
    Relay control circuit 失效
    继电器控制电路

    公开(公告)号:US4153922A

    公开(公告)日:1979-05-08

    申请号:US856978

    申请日:1977-12-02

    IPC分类号: H01H9/56 H02H7/22

    CPC分类号: H01H9/56 Y10T307/931

    摘要: A relay control circuit is disclosed in which a timer circuit is actuated by a reference clock pulse in synchronism with an AC voltage supplied by a commercial power supply. An output signal of the timer circuit causes current to flow in the coil of the relay thereby to close the contact of a relay. The invention further comprises a polarity-reversing device for reversing the polarity in accordance with the variations in the output signal of the timer circuit. The reference clock pulse is applied to the timer circuit through the polarity-reversing device.

    摘要翻译: 公开了一种继电器控制电路,其中定时器电路由与商用电源提供的AC电压同步的参考时钟脉冲驱动。 定时器电路的输出信号使电流在继电器的线圈中流动,从而闭合继电器的接触。 本发明还包括根据定时器电路的输出信号的变化使极性反转的极性反转装置。 参考时钟脉冲通过极性反转装置施加到定时器电路。

    Method and apparatus for detecting a phase or frequency error of a signal
    5.
    发明授权
    Method and apparatus for detecting a phase or frequency error of a signal 失效
    用于检测信号的相位或频率误差的方法和装置

    公开(公告)号:US4599569A

    公开(公告)日:1986-07-08

    申请号:US579593

    申请日:1984-02-13

    CPC分类号: H02P23/186

    摘要: A detector circuit for detecting a phase or frequency error of an input signal. One mode of at least two detection modes is selected according to a phase or a frequency of the input signal with each mode having a reference value of a phase or a frequency of the input signal and reference values of the detection modes being different from each other. A pulse signal having a phase corresponding to a difference between an actual phase or frequency of the input signal and the reference value of the phase or the frequency is generated, and a predetermined carrier signal is pulse width modulated with a predetermined modulation factor in response to the pulse signal, the modulation factor being different for each detection mode.

    摘要翻译: 用于检测输入信号的相位或频率误差的检测器电路。 根据输入信号的相位或频率来选择至少两个检测模式的一个模式,每个模式具有输入信号的相位或频率的参考值,并且检测模式的参考值彼此不同 。 产生具有对应于输入信号的实际相位或频率与相位或频率的参考值之间的差的相位的脉冲信号,并且响应于预定的调制因子而对预定载波信号进行脉冲宽度调制 脉冲信号,每个检测模式的调制因数不同。