公开(公告)号：US5917921A

公开(公告)日：1999-06-29

申请号：US424581

申请日：1995-04-17

申请人： Tooru Sasaki ,  Masashi Ohkubo

发明人： Tooru Sasaki ,  Masashi Ohkubo

IPC分类号： H04R1/40 ,  H04R3/00 ,  H04R3/04 ,  H04B15/00

CPC分类号： H04R1/406 ,  H04R3/005 ,  H04R2410/07

摘要： A noise reducing microphone apparatus having an adaptive noise canceller which has a primary input and a reference input and in which the reference input is subtracted from the primary input through an adaptive filter and the adaptive filter is adaptively controlled by an output signal resulted from the subtraction, comprises. The apparatus includes a pair of microphone units disposed in proximate locations; and subtracting means for performing subtraction of outputs from the pair of microphone units. An output from one of the microphone units is supplied as the primary input of the adaptive noise canceller. A differential output from the subtracting means is supplied as the reference input of the adaptive noise canceller.

摘要翻译： 具有自适应噪声消除器的降噪麦克风装置具有初级输入和参考输入，其中通过自适应滤波器从初级输入中减去参考输入，并且自适应滤波器由减法产生的输出信号自适应地控制 ， 包含。 该装置包括设置在邻近位置的一对麦克风单元; 以及减法装置，用于执行从该对麦克风单元的输出的相减。 来自一个麦克风单元的输出被提供作为自适应噪声消除器的主要输入。 来自减法装置的差分输出被提供作为自适应噪声消除器的参考输入。

公开(公告)号：US5073886A

公开(公告)日：1991-12-17

申请号：US321821

申请日：1989-03-10

申请人： Tooru Sasaki ,  Nobukazu Hosoya

发明人： Tooru Sasaki ,  Nobukazu Hosoya

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B7/135 ,  H04N9/793 ,  H04N9/82 ,  H04N9/835

CPC分类号： H04N9/793 ,  G11B7/005 ,  H04N9/8216 ,  H04N9/835

摘要： Provided is a signal reproducing circuit for an optical disc player including a multidivisional photodetector with photoelectric converting elements in a preceding side and photoelectric converting elements in a succeeding side relative to a proceeding direction of pits of an optical disc, a variable delay circuit for delaying outputs from the photoelectric converting elements in the preceding side, a circuit for detecting a time difference between an output from the photo electric converting elements in the succeeding side and an output from the variable delay circuit, and a circuit responsive to an output from the time difference detecting circuit for changing a delay time of the variable delaying circuit. The signal reproducing circuit further includes a circuit for amplifying and correcting high frequency components of signals reproduced by the photo detector in response to the output from the time difference detecting circuit. This structure extends a reproduced frequency band, improves a high frequency characteristic of the video signals reproduced from the optical disc and supplies video signals having superior frequency characteristics.

公开(公告)号：US5541909A

公开(公告)日：1996-07-30

申请号：US137969

申请日：1993-10-19

申请人： Junji Nakajima ,  Kunikazu Ohnishi ,  Tooru Sasaki ,  Makoto Miyamoto ,  Masaaki Kurebayashi ,  Yoshio Suzuki ,  Masayuki Inoue ,  Hisamitsu Tanaka ,  Motoyuki Suzuki ,  Yukio Fukui

发明人： Junji Nakajima ,  Kunikazu Ohnishi ,  Tooru Sasaki ,  Makoto Miyamoto ,  Masaaki Kurebayashi ,  Yoshio Suzuki ,  Masayuki Inoue ,  Hisamitsu Tanaka ,  Motoyuki Suzuki ,  Yukio Fukui

IPC分类号： G11B7/0037 ,  G11B7/005 ,  G11B7/013 ,  G11B7/09 ,  G11B7/135 ,  G11B7/24 ,  G11B7/243

CPC分类号： G11B7/24 ,  G11B7/0051 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/0941 ,  G11B7/1365 ,  G11B7/1398 ,  G11B7/0945 ,  G11B7/24085 ,  G11B7/243

摘要： A masking type light control layer for decreasing its reflection factor in a high-temperature region is formed on phase pits of an optical disc, and the phase pit depth is set to a predetermined value. A light spot for reproduction is shaped to an elliptical form and two sub-flux beams on the optical disc are spaced by 5/4 track pitch from a principal flux beam in the radial direction of the optical disc. The kind of optical disc is discriminated and reproduction laser power and characteristics of an equalizer circuit are switched in accordance with the type of an optical disc. Through this, a stable servo signal detection can be ensured and repetitive reproduction characteristics can be improved.

摘要翻译： 在光盘的相位凹坑上形成用于降低高温区域的反射系数的掩模型光控制层，将相位深度设定为规定值。 用于再现的光斑被成形为椭圆形，并且光盘上的两个子光束在光盘的径向方向上从主通量束间隔开+ E，fra 5/4 + EE轨道间距。 根据光盘的类型，鉴别出光盘的种类和再现激光功率和均衡器电路的特性。 由此，能够确保稳定的伺服信号检测，能够提高重复再生特性。

公开(公告)号：US5471538A

公开(公告)日：1995-11-28

申请号：US57821

申请日：1993-05-07

申请人： Tooru Sasaki ,  Kaoru Gyotoku

发明人： Tooru Sasaki ,  Kaoru Gyotoku

IPC分类号： H03H21/00 ,  H04B3/04 ,  H04R1/40 ,  H04R3/00

CPC分类号： H04R3/005

摘要： A microphone apparatus having a first microphone for picking up a desired sound and a second microphone with directionality in which sensitivity is low to the desired sound arrival direction. A sound signal from the second microphone is supplied to a subtracting circuit through an adaptive filter. The subtracting circuit subtracts an output signal of the adaptive filter from the sound signal coming from the first microphone. A circuit is provided to adjust the adaptive filter so that the output power of the subtracting circuit is minimized. The setup implements a microphone system which is compact in size and easily provides desired directionality.

摘要翻译： 麦克风装置具有用于拾取所需声音的第一麦克风和具有灵敏度低到期望声音到达方向的方向性的第二麦克风。 来自第二麦克风的声音信号通过自适应滤波器提供给减法电路。 减法电路从来自第一麦克风的声音信号中减去自适应滤波器的输出信号。 提供电路来调整自适应滤波器，使得减法电路的输出功率最小化。 该设置实现了尺寸紧凑且容易提供所需方向性的麦克风系统。

公开(公告)号：US5428455A

公开(公告)日：1995-06-27

申请号：US467076

申请日：1990-01-18

申请人： Nobukazu Hosoya ,  Tooru Sasaki

发明人： Nobukazu Hosoya ,  Tooru Sasaki

IPC分类号： G11B20/06 ,  H04N9/79 ,  H04N9/793 ,  H04N5/76

CPC分类号： H04N9/7912 ,  H04N9/7908 ,  H04N9/7933

摘要： An apparatus for reducing noise in the high-frequency band is provided in the preceding stage of a limiter (8) with a high-frequency band correcting filter (12) for reducing a high-frequency band component of a reproduced RF signal from an optical disc. The reproduced RF signal has its high-frequency component lowered before entered into the limiter (18), reducing noise and beat components. As a result, a signal which is less influenced by the noise and beat and has good S/N can be obtained.

摘要翻译： 在具有高频带校正滤波器（12）的限幅器（8）的前级中提供用于降低来自光学器件的再现RF信号的高频带分量的用于降低高频带中的噪声的装置 光盘。 再现的RF信号在进入限幅器（18）之前具有降低的高频分量，从而降低噪声和拍频分量。 结果，可以获得受噪声和拍子影响较小并具有良好S / N的信号。

公开(公告)号：US4942314A

公开(公告)日：1990-07-17

申请号：US245179

申请日：1988-09-16

申请人： Nobukazu Hosoya ,  Kazunori Nohara ,  Yasuyuki Ikeguchi ,  Tooru Sasaki ,  Yoshichika Hirao

发明人： Nobukazu Hosoya ,  Kazunori Nohara ,  Yasuyuki Ikeguchi ,  Tooru Sasaki ,  Yoshichika Hirao

IPC分类号： G11C27/02 ,  H04N9/68 ,  H04N9/72

CPC分类号： H04N9/68 ,  G11C27/026 ,  H04N9/72

摘要： A peak holding circuit comprises a capacitor for holding signal charges corresponding to a peak level of an input signal, and a current amplifier circuit comprising transistors connected in a triple darlington manner for supplying an output current corresponding to the held charges. An emitter of a transistor in the first stage out of the transistors connected in a darlington manner is connected to a collector of another transistor through which a collector cut-off current flows which is approximately equal to a collector cut-off current flowing through the transistor in the first stage. The other transistor has its emitter connected to ground. Therefore, the collector cut-off current flowing through the transistor in the first stage is cancelled, so that fluctuations in output current can be prevented even if a large reactive current is not allowed to flow through a transistor in the final stage out of the transistors connected in a darlington manner.

摘要翻译： 峰值保持电路包括用于保持与输入信号的峰值电平对应的信号电荷的电容器，以及包括以三重达赖顿方式连接的晶体管的电流放大器电路，用于提供与所保持的电荷相对应的输出电流。 在达赖顿方式连接的晶体管中的第一级晶体管的发射极连接到集电极截止电流流过的另一晶体管的集电极，其大约等于流过晶体管的集电极截止电流 在第一阶段 另一个晶体管的发射极连接到地。 因此，在第一级中流过晶体管的集电极截止电流被消除，从而即使无法大的无功电流不能通过最终级的晶体管流出晶体管，也可以防止输出电流的波动 以达林顿方式连接。

公开(公告)号：US4352295A

公开(公告)日：1982-10-05

申请号：US48493

申请日：1979-06-14

申请人： Osamu Maehara ,  Tooru Sasaki

发明人： Osamu Maehara ,  Tooru Sasaki

IPC分类号： G01L3/10

CPC分类号： G01L3/109

摘要： An instantaneous torque determining apparatus for obtaining the instantaneous torque value continuously of a shaft rotating at a high speed. The apparatus includes a pair of spaced gears mounted on the shaft, a torque detector having a pickup for each gear, a set of voltage comparators, a gate control circuit, an AND circuit, and a clock pulse generator. Further, the apparatus also includes a delay circuit for receiving pulses from a voltage comparator, a subtraction counter which receives a delayed pulse as a subtractor starting instruction, and a set of first and second ratio multipliers forming a counting circuit loop with the counter. First and second latch circuits store the counted value outputs and apply such outputs as an input to another counter and to a Digital-Analogue transducer. The pick-ups of the torque detectors are respectively arranged to face the gear to provide voltage signals in pulse form when the shaft rotates and each tooth of the gear passes in front of its respective pick-up. The phase difference in each period of the voltage signals is proportional to the instantaneous value of torque applied to the shaft and an inverse value of the period of these voltage signals is proportional to the instantaneous rotating speed of the shaft.

摘要翻译： 一种用于获得以高速旋转的轴连续的瞬时扭矩值的瞬时扭矩确定装置。 该装置包括安装在轴上的一对间隔齿轮，具有用于每个齿轮的拾取器的扭矩检测器，一组电压比较器，门控制电路，AND电路和时钟脉冲发生器。 此外，该装置还包括用于从电压比较器接收脉冲的延迟电路，接收延迟脉冲作为减法器启动指令的减法计数器，以及与计数器形成计数电路回路的一组第一和第二比例乘法器。 第一和第二锁存电路存储计数值输出，并将这样的输出作为输入施加到另一个计数器和数字模拟换能器。 扭矩检测器的拾取器分别布置成面向齿轮以在轴旋转时提供脉冲形式的电压信号，并且齿轮的每个齿通过其各自的拾取器前面。 电压信号的每个周期的相位差与施加到轴的转矩的瞬时值成比例，并且这些电压信号的周期的反相值与轴的瞬时转速成比例。