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    • 1. 发明授权
    • Stereo pickup with printed circuit coils mounted in a linear field
    • 具有安装在线性场中的印刷电路线圈的立体声拾取器
    • US4374433A
    • 1983-02-15
    • US122261
    • 1980-02-19
    • Hiroshi OgawaKazuhiro SatoNorio ShibataKatsuhiko OguriMasayoshi UtidaTsuyoshi Ono
    • Hiroshi OgawaKazuhiro SatoNorio ShibataKatsuhiko OguriMasayoshi UtidaTsuyoshi Ono
    • H04R9/16H04R9/04
    • H04R9/16
    • A moving-coil type stereo pickup cartridge comprises a vibration mechanism, including a stylus for tracing the groove of a sound track on a record disc, at least one coil plate provided in the vibration system and adapted to vibrate in response to vibrations of the stylus, and a structure for forming a magnetic field for the coil plate. The coil plate comprises a thin insulative substrate and a pair of left and right coils substantially symmetric with respect to a center line and formed by an electrically conductive thin film placed in a spirally wound pattern on at least one surface of the substrate. The magnetic field-forming construction comprises a permanent magnet and a pair of yokes adapted to clamp the permanent magnet. The pair of yokes have confronting surfaces for defining a gap in which the coil plate is interposed and a recessed substantially reverse V-shaped notch or cutout. The notch is defined by edge parts or facets. The configuration of the edge parts is such that the contour lines of the density of the leakage magnetic flux at least within the space confronting the coils and in the notch extend substantially at angles of plus and minus 45.degree. to the center line.
    • 动圈式立体拾音盒包括振动机构,其包括用于跟踪记录盘上的声轨的凹槽的触针,设置在振动系统中的至少一个线圈板,并且响应于触针的振动而振动 以及用于形成用于线圈板的磁场的结构。 线圈板包括薄绝缘基板和一对左右线圈,其相对于中心线基本对称,并且由在基板的至少一个表面上以螺旋卷绕的图案放置的导电薄膜形成。 磁场形成结构包括永磁体和适于夹紧永磁体的一对磁轭。 一对轭具有用于限定线圈板插入的间隙的面对面以及凹入的大致相反的V形凹口或切口。 凹口由边缘部分或小面定义。 边缘部分的构造使得至少在线圈和凹口内的空间内的泄漏磁通密度的轮廓线基本上以与中心线正+ 45度的角度延伸。
    • 3. 发明授权
    • Moving-coil type pickup cartridge
    • 动圈式皮卡
    • US4209670A
    • 1980-06-24
    • US953777
    • 1978-10-23
    • Tsuyoshi OnoNorio ShibataKatsuhiko OguriMasayoshi UchidaKazuhiro SatoHidetoshi Sato
    • Tsuyoshi OnoNorio ShibataKatsuhiko OguriMasayoshi UchidaKazuhiro SatoHidetoshi Sato
    • H04R9/16
    • H04R9/16
    • A moving-coil type pickup cartridge comprising a cantilever provided at the free end thereof with a stylus for tracing a sound groove of a record disc, a coil plate provided on the cantilever in a manner to vibrate in response to vibration of the stylus, and an arrangement for producing an effective magnetic field within a specific gap. The coil plate comprises a thin electrically insulating base plate and at least one coil which is formed from a thin film in a spirally-shaped pattern on at least one surface of the base plate. The coil plate has at least one upright part formed by bending the base plate together with a portion of the coil and interposed in a freely vibratory manner within said gap of the magnetic field producing arrangement and a mounting part integrally joined to the upright part and fixed to the cantilever.
    • 一种动圈式拾取盒,包括悬臂,其在其自由端设置有用于跟踪记录盘的声槽的触笔,以响应于触针振动的方式设置在悬臂上的线圈板,以及 用于在特定间隙内产生有效磁场的装置。 线圈板包括薄的电绝缘基板和至少一个线圈,其由基板的至少一个表面上的螺旋形图案的薄膜形成。 线圈板具有至少一个直立部,其通过将基板与线圈的一部分一起弯曲而形成,并且以自由振动的方式插入到所述磁场产生装置的所述间隙内;以及安装部,其一体地连接到直立部并固定 到悬臂
    • 7. 发明授权
    • Bit clock signal generator for use in a digital signal demodulator
    • 位时钟信号发生器用于数字信号解调器
    • US4777452A
    • 1988-10-11
    • US102997
    • 1987-09-30
    • Atsushi HayamiTsuyoshi OnoKazuo HikawaTakeshi Shimizu
    • Atsushi HayamiTsuyoshi OnoKazuo HikawaTakeshi Shimizu
    • H03K5/00G11B20/10G11B20/14H03K5/135H04L7/027H04L25/40H04B1/16
    • G11B20/1403G11B20/10
    • This invention relates to a digital audio tape recorder using a rotary magnetic head. On the tape which has been recorded using R-DAT, signals forming to the industry standards are recorded at a standard tape speed. The tape is caused to run at a speed faster than the standard tape speed and the recording signal is subjected to high speed reproducing while maintaining the rotational frequency of the head at a rotational speed at the time of recording. For realizing this, a bit clock signal generator for use in a digital signal demodulator is provided, which comprises means for generating a detection window pulse having a predetermined pulse width shorter than a period of a bit clock signal from either of time points of rise and fall of the waveform of a signal to be demodulated, or from both the time points thereof, said signal to be demodulated being a digital signal modulated in accordance with a modulation system such as a system constituted with a periodical signal intermittently including a phase information of the bit clock signal to deliver the detection window pulse to a phase locked loop including a phase comparison circuit and a voltage controlled oscillator as a comparison wave, thus allowing the voltage controlled oscillator in the phase locked loop to generate a bit clock signal, characterized by the provision of means for changing the pulse width of the detection window pulse in correspondence with changes in a bit rate of the demodulated signal.
    • 本发明涉及使用旋转磁头的数字音频磁带录像机。 在使用R-DAT记录的磁带上,以标准磁带速度记录形成行业标准的信号。 使磁带以比标准磁带速度更快的速度运行,并且记录信号经受高速再现,同时在记录时将磁头的旋转频率保持在转速。 为了实现这一点,提供了一种用于数字信号解调器的位时钟信号发生器,其包括用于产生具有比来自时间点上升的位时钟信号的周期短的预定脉冲宽度的检测窗脉冲的装置,以及 要解调的信号的波形的下降,或者从它们的两个时间点起,要被解调的信号是根据诸如由周期性信号构成的系统调制的数字信号,周期性信号间歇地包括相位信息 该位时钟信号用于将检测窗脉冲传送到包括相位比较电路和压控振荡器作为比较波的锁相环,从而允许锁相环中的压控振荡器产生位时钟信号,其特征在于 提供用于根据位老鼠的变化改变检测窗脉冲的脉冲宽度的装置 e的解调信号。
    • 8. 发明授权
    • Separation band detecting circuit in an automatic program selection
record player
    • 自动程序选择记录播放器中的分离带检测电路
    • US4464740A
    • 1984-08-07
    • US377846
    • 1982-05-13
    • Tsuyoshi OnoFumiaki Ohno
    • Tsuyoshi OnoFumiaki Ohno
    • G11B3/085G11B3/095G11B3/38G11B17/06
    • G11B3/0957G11B3/08512
    • A separation band detecting circuit is used in an automatic program selection record player which has a photodetector which moves together with a tone arm and comprises a light-emitting element for emitting light against the surface of the record and a photosensitive element for receiving the light reflected at the record surface and producing an output in accordance with the light quantity of the received reflected light. The detecting circuit comprises an operational amplifier supplied with the output of the photodetector to its one input terminal, and a time constant circuit connected to the other input terminal of said operational amplifier, for giving a threshold level with respect to the operational amplifier and giving a time constant with respect to the level fluctuation in the threshold value. The time constant circuit varies the threshold level with a time constant, according to an input signal level to the one input terminal of the operational amplifier. The operational amplifier inverts its output when the relationship between amplitudes of the input signal level and the threshold level reverses.
    • 分离带检测电路用于具有与色调臂一起移动的光电检测器的自动程序选择记录播放器,并且包括用于向记录表面发射光的发光元件和用于接收光反射的光敏元件 在记录表面上并根据所接收的反射光的光量产生输出。 检测电路包括一个运算放大器,该放大器提供有光电探测器的输出到其一个输入端,以及时间常数电路,连接到所述运算放大器的另一个输入端,用于给予运算放大器的阈值电平, 相对于阈值的电平波动的时间常数。 根据对运算放大器的一个输入端的输入信号电平,时间常数电路根据时间常数改变阈值电平。 当输入信号电平和阈值电平的幅度之间的关系反转时,运算放大器反相其输出。