公开(公告)号：US4789976A

公开(公告)日：1988-12-06

申请号：US30159

申请日：1987-03-25

申请人： Masakazu Fujishima

发明人： Masakazu Fujishima

IPC分类号： G11B7/005 ,  G11B7/09 ,  G11B20/00 ,  G11B20/10 ,  H03D3/06 ,  H03D3/18 ,  H03K5/00 ,  H03K5/13 ,  H03K5/133 ,  H03K5/134 ,  H03K9/06 ,  H03K19/003 ,  H04N5/922 ,  H04N9/802 ,  H04N9/88 ,  G11B7/00

CPC分类号： G11B20/10009 ,  G11B20/00007 ,  G11B7/005 ,  G11B7/0946 ,  H03D3/18 ,  H03K19/00323 ,  H03K19/00369 ,  H03K5/133 ,  H04N9/802 ,  H04N9/88 ,  H03K2005/00097 ,  H03K2005/00104 ,  H03K2005/00195

摘要： A circuit for compensating change in delay time of a delay circuit due to variation in temperature employs, as a phase shifter of a pulse FM detection circuit, a delay circuit whose delay time is subject to change due to variation in temperature and can be controlled in response to a control signal. A dc component in an output of this pulse FM detection circuit is compared with a preset reference value and a resulting comparison output is used for controlling the delay time of the delay circuit and thereby compensating the temperature characteristic of the delay time. In a device using plural delay circuits, these delay circuits can be disposed on the same substrate and the delay times of these delay circuits can be controlled by the same comparison output. Since a signal which is handled by a delay circuit is utilized for the temperature compensation, an accurate temperature compensation can be realized with a simple circuit construction.

摘要翻译： 用于补偿由于温度变化引起的延迟电路的延迟时间变化的电路，作为脉冲FM检测电路的移相器，采用延迟电路，其延迟时间由于温度变化而变化，并且可以控制在 对控制信号的响应。 将该脉冲FM检测电路的输出中的直流分量与预先设定的基准值进行比较，得到的比较输出用于控制延迟电路的延迟时间，从而补偿延迟时间的温度特性。 在使用多个延迟电路的装置中，这些延迟电路可以设置在相同的基板上，并且可以通过相同的比较输出来控制这些延迟电路的延迟时间。 由于由延迟电路处理的信号用于温度补偿，所以可以用简单的电路结构实现精确的温度补偿。

公开(公告)号：US07141733B2

公开(公告)日：2006-11-28

申请号：US09968818

申请日：2001-10-02

申请人： Masakazu Fujishima ,  Minoru Ogita ,  Shingo Kamiya

发明人： Masakazu Fujishima ,  Minoru Ogita ,  Shingo Kamiya

IPC分类号： A63H5/00 ,  G04B13/00 ,  G10H7/00

CPC分类号： G10H1/365 ,  G06Q20/3829

摘要： Music piece data of so-called managed music pieces, each of which requires allowance of performance for each karaoke apparatus are stored in a hard disk in the same manner as music piece data of other karaoke music pieces. A ROM (20), which has stored therein key data for allowing performance of a managed music piece, is produced for each of the managed music pieces and for each of karaoke apparatuses. Performance of a managed music piece is allowed by setting a corresponding ROM (20) into a karaoke apparatus. Accordingly, a karaoke apparatus is not required to have a medium such as a CD-ROM for each of managed music pieces, and the copyright holder of a managed music piece can physically manage the number of allowed performances by way of the ROM (20).

摘要翻译： 所谓管理音乐片段的音乐作品数据，其中每个音乐片段需要每个卡拉OK装置的性能要求被保存在与其他卡拉OK乐曲的乐曲数据相同的硬盘中。 为每个管理乐曲和卡拉OK装置产生一个存储有用于允许演奏管理乐曲的键数据的ROM（20）。 通过将相应的ROM（20）设置为卡拉OK装置，允许管理的乐曲的演奏。 因此，卡拉OK装置不需要具有用于每个管理乐曲的CD-ROM的介质，并且管理乐曲的版权所有者可以通过ROM（20）物理地管理允许的表演的数量， 。

公开(公告)号：US4232394A

公开(公告)日：1980-11-04

申请号：US49788

申请日：1979-06-18

申请人： Masakazu Fujishima

发明人： Masakazu Fujishima

IPC分类号： G01R23/10 ,  H03J1/04 ,  H04B1/16 ,  G01R21/10

CPC分类号： G01R23/10 ,  H03J1/04 ,  H04B1/16

摘要： A station-signal frequency indicating system for a radio receiver, in which the content in a counter counting an output of a local oscillator in the receiver is temporarily retained by a latching circuit and in turn is displayed by an indicator, and in which a control circuit inhibits the retained content in the latching circuit from being changed, immediately after the receiver is tuned exactly to a station signal until the receiver is detuned from this station signal.

摘要翻译： 一种用于无线电接收机的站信号频率指示系统，其中计数接收机中的本地振荡器的输出的计数器中的内容由锁存电路暂时保持，并且由指示符显示，并且其中控制 在接收机精确调谐到站信号之后，直到接收机与该站信号失谐之前，电路才能阻止锁存电路中保留的内容被改变。

公开(公告)号：US4835758A

公开(公告)日：1989-05-30

申请号：US028758

申请日：1987-03-23

申请人： Masakazu Fujishima

发明人： Masakazu Fujishima

IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/09 ,  G11B20/18

CPC分类号： G11B20/18 ,  G11B7/00375

摘要： A dropout detection device for use in a device for playing back an optical disc such as a video disc and a Compact Disc comprises a four-split photodetector receiving laser beam through a disc on which information is recorded, a sum signal generation circuit for generating sum signals of output signals of two detectors positioned on diagonals of the four-split photodetector, and a dropout detection circuit for detecting difference in the waveform between two output sum signals of the sum signal generation circuit. A dropout in a reproduced signal is detected directly on the basis of result of detection by the dropout detection circuit without subjecting the reproduced signal to other signal processings so that a simplified circuit design can be realized.

摘要翻译： 用于再现诸如视频光盘和光盘的光盘的设备中使用的压差检测装置包括四分割光电检测器，其通过记录有信息的盘接收激光束，用于产生和的和信号产生电路 位于四分割光电检测器的对角线上的两个检测器的输出信号的信号，以及用于检测和信号发生电路的两个输出和信号之间的波形差异的压差检测电路。 基于通过压差检测电路的检测结果直接检测再生信号的压差，而不对再生信号进行其他信号处理，从而可以实现简化的电路设计。

公开(公告)号：US4435618A

公开(公告)日：1984-03-06

申请号：US341080

申请日：1982-01-20

申请人： Masakazu Fujishima

发明人： Masakazu Fujishima

IPC分类号： H04B1/10 ,  H04B1/12 ,  H04H5/00

CPC分类号： H04B1/123

摘要： A circuit for eliminating a beat signal resulting from interference between a broadcast signal of a received station and a broadcast signal of an adjacent station during the reception of an AM broadcast. A cancel signal generating circuit for forming a cancel signal synchronized to the beat signal contained in an AM detected output signal is connected to the output of an AM detector. The cancel signal is combined with the AM detected output signal in a mixing circuit connected to the AM detector, to eliminate the beat signal. Such a beat signal cancelling circuit may be served by a pilot signal cancelling circuit in an FM receiver.

摘要翻译： 一种用于在接收AM广播期间消除由接收站的广播信号与相邻站的广播信号之间的干扰产生的节拍信号的电路。 用于形成与AM检测输出信号中包含的拍频信号同步的消除信号的消除信号发生电路连接到AM检测器的输出端。 在与AM检测器连接的混合电路中，消除信号与AM检测到的输出信号组合，以消除拍频信号。 这样的拍频信号消除电路可以由FM接收机中的导频信号消除电路服务。