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    • 7. 发明授权
    • Optical signal reproducing apparatus
    • 光信号重放装置
    • US4504934A
    • 1985-03-12
    • US305346
    • 1981-09-24
    • Shinichi TanakaIkuo MatsudaNamio HiroseKazutsugu Kobayashi
    • Shinichi TanakaIkuo MatsudaNamio HiroseKazutsugu Kobayashi
    • G11B11/18
    • G11B11/18
    • In an optical signal reproducing apparatus for a conventional disc phonograph record, the groove of said record is irradiated with the light beam from a direction that varies cyclically at a constant frequency in a plane. Said plane includes both the tangential velocity vector of the groove and a normal line to the surface of the groove. At the moment that the light beam irradiates the surface of the groove from a perpendicular direction, the reflected light beam traces back the same path as that of the irradiating light beam. When a photo-detector is limited by a slit to detect only the reflected light beam tracing back the same path as the irradiating light beam, the photo-detector detects light pulses which are pulse-phase-modulated by the slope angle of the surface of the groove. The recorded signal can be reproduced by demodulating said pulse-phase-modulated pulses.
    • 在用于常规唱盘唱片记录的光信号再现装置中,所述记录的凹槽用平面中恒定频率周期性变化的方向用光束照射。 所述平面包括凹槽的切向速度矢量和与凹槽表面的法线。 在光束从垂直方向照射槽的表面的那一刻起,反射光束跟踪与照射光束相同的路径。 当光检测器被狭缝限制以仅检测跟照射光束跟踪相同路径的反射光束时,光检测器检测由脉冲相位调制的光脉冲, 凹槽 可以通过对所述脉冲相位调制脉冲进行解调来再现所记录的信号。
    • 8. 发明授权
    • Electronic control apparatus
    • 电子控制装置
    • US4035700A
    • 1977-07-12
    • US640265
    • 1975-12-12
    • Itaru KawasakiKouichi YamaguchiYoshiaki IgarashiKazutsugu Kobayashi
    • Itaru KawasakiKouichi YamaguchiYoshiaki IgarashiKazutsugu Kobayashi
    • H02P6/16G05F1/56H02P6/14H02K29/00
    • H02M7/53875H02P6/14
    • An electronic control apparatus for controlling currents supplied to star-connected multiphase loads. The apparatus has two sets of switching means, a reference signal source, a voltage detector for detecting the voltage of the common terminal of the star-connection, a comparator for comparing the outputs of the voltage detector and the reference signal source, a feedback amplifier for amplifying the output of the comparator, a load current supplying means for supplying a current to the multiphase loads through one set of the two sets of the switching means according to a command signal, a feedback current draining means coupled to the feedback amplifier and the other set of the two sets of the switching means, and a timing signal generator for selectively switching the two sets of the switching means, wherein the feedback current draining means drains the current through said other set of switching means from the multiphase loads so as to keep the voltage at the common terminal of the star connection constant or substantially constant regardless of the mode of the timing signal generator.
    • 一种用于控制提供给星形连接的多相负载的电流的电子控制装置。 该装置具有两组开关装置,参考信号源,用于检测星形连接的公共端子的电压的电压检测器,用于比较电压检测器和参考信号源的输出的比较器,反馈放大器 用于放大比较器的输出;负载电流提供装置,用于根据命令信号,通过一组两组开关装置向多相负载提供电流;耦合到反馈放大器的反馈电流消耗装置和 两组开关装置中的另一组,以及用于选择性地切换两组开关装置的定时信号发生器,其中反馈电流消耗装置从多相负载中排出通过所述另一组开关装置的电流,以便 将恒星连接的公共端子处的电压保持恒定或基本恒定,而不管定时信号类型的模式如何 呃