Circuit arrangement for adding two signals in exact mutual phase position
    3.
    发明授权
    Circuit arrangement for adding two signals in exact mutual phase position 失效
    用于在精确相位位置添加两个信号的电路设置

    公开(公告)号:US3681648A

    公开(公告)日:1972-08-01

    申请号:US3681648D

    申请日:1969-06-12

    Applicant: TESLA NP

    Inventor: MACK ZDENEK

    CPC classification number: H04H20/48

    Abstract: A first signal is supplied to a first resonance amplifier and the second harmonic of the first signal is supplied to a second resonance amplifier. The first resonance amplifier is coupled to the vertical deflection plate system of a cathode ray oscilloscope and to an input of a summing device. The second resonance amplifier is coupled to the horizontal deflection plate system of the oscilloscope and to another input of the summing device.

    Apparatus and method for detecting phase deviation of a pilot subcarrier in stereophonic multiplex broadcasting
    4.
    发明授权
    Apparatus and method for detecting phase deviation of a pilot subcarrier in stereophonic multiplex broadcasting 失效
    用于检测STEREOPHONIC MULTIPLEX广播中的PILOT SUBCARRIER相位偏差的装置和方法

    公开(公告)号:US3660607A

    公开(公告)日:1972-05-02

    申请号:US3660607D

    申请日:1970-04-01

    Applicant: TESLA NP

    Inventor: MACK ZDENEK

    CPC classification number: H04H20/48

    Abstract: Method and apparatus for detecting both the magnitude and direction of any deviation in the pilot-subcarrier wave by conventionally separating the pilot carrier, regenerating and shifting its resultant signal by 90* and comparing it with a signal derived from the multiplex signal to produce a signal indicative of the magnitude of deviation. Simultaneously a reference signal is obtained from the original multiplex signal which is in phase with the comparison signal. The deviation signal and the reference signal are then demodulated to produce a directional voltage.

    Abstract translation: 通过传统分离导频载波来检测导频子载波波中的任何偏差的幅度和方向,通过将其合成信号再生并将其移位90°并将其与从多路复用信号导出的信号进行比较,以产生信号 指示偏差的大小。 同时,从与比较信号同相的原始多路复用信号获得参考信号。 然后解调偏差信号和参考信号以产生定向电压。

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