利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

10 条记录 (耗时 0.02 秒)

    Electronic impedance circuit including a compensation arrangement for d.c. offset
    1.
    发明授权
    Electronic impedance circuit including a compensation arrangement for d.c. offset 失效
    电子阻抗电路包括直流补偿装置。 抵消

    公开(公告)号：US4520282A

    公开(公告)日：1985-05-28

    申请号：US411997

    申请日：1982-08-27

    申请人： Kazuo Watanabe ,  Yuichi Ohkubo ,  Akira Haeno ,  Fumihiko Yokogawa

    发明人： Kazuo Watanabe ,  Yuichi Ohkubo ,  Akira Haeno ,  Fumihiko Yokogawa

    IPC分类号： H03G3/10 ,  H03F3/45 ,  H03H11/02 ,  H03H11/46 ,  H03K3/023 ,  H03H11/00

    CPC分类号： H03F3/45479 ,  H03H11/46

    摘要： An electronic impedance circuit is constructed of a voltage-current converter and a variable gain current amplifier. The voltage-current converter includes first and second transistors of the PNP-type differentially connected. The variable gain current amplifier includes third and fourth transistors of the NPN-type differentially connected, and fifth and sixth transistors of the PNP-type as load means. The bases of the third and fourth transistors are respectively driven by collector signals of the first and second transistors, and a collector signal of the third transistor is fed back to the base of the second transistor. In order to reduce a d.c. offset attributed to a current flowing between the base of the second transistor and the collector of the third transistor, a compensation circuit is connected to the variable gain amplifier. This compensation circuit can provide compensation by producing a compensation current for cancelling the current between the base of the second transistor and the collector of the third transistor.

    摘要翻译： 电子阻抗电路由电压 - 电流转换器和可变增益电流放大器构成。 电压 - 电流转换器包括PNP型差分连接的第一和第二晶体管。 可变增益电流放大器包括NPN型差分连接的第三和第四晶体管，以及PNP型作为负载装置的第五和第六晶体管。 第三和第四晶体管的基极分别由第一和第二晶体管的集电极信号驱动，第三晶体管的集电极信号被反馈到第二晶体管的基极。 为了减少直流 归因于在第二晶体管的基极和第三晶体管的集电极之间流动的电流的补偿，补偿电路连接到可变增益放大器。 该补偿电路可以通过产生用于消除第二晶体管的基极和第三晶体管的集电极之间的电流的补偿电流来提供补偿。

    Automatic loading disc player
    3.
    发明授权
    Automatic loading disc player 失效
    自动加载光盘播放器

    公开(公告)号：US4879705A

    公开(公告)日：1989-11-07

    申请号：US244641

    申请日：1988-09-12

    申请人： Yoshio Aoyagi ,  Hiroyuki Hirano ,  Toshiyuki Kimura ,  Susumu Niinuma ,  Minoru Yoshioka ,  Akira Haeno ,  Takashi Sato ,  Yoshiro Nishi ,  Yoshihiko Watanabe ,  Fumihiko Yokogawa ,  Keiichi Matsumoto ,  Youichi Ogawa

    发明人： Yoshio Aoyagi ,  Hiroyuki Hirano ,  Toshiyuki Kimura ,  Susumu Niinuma ,  Minoru Yoshioka ,  Akira Haeno ,  Takashi Sato ,  Yoshiro Nishi ,  Yoshihiko Watanabe ,  Fumihiko Yokogawa ,  Keiichi Matsumoto ,  Youichi Ogawa

    IPC分类号： G11B7/09 ,  G11B17/04 ,  G11B21/08 ,  G11B27/10

    CPC分类号： G11B17/051 ,  G11B21/085 ,  G11B27/105 ,  G11B7/0946

    摘要： A disc player comprising a signal pickup unit to read information from a disc on which program information including address information is recorded, the signal pickup unit being movable with respect to the disc, pickup drive means to drive the pickup unit for movement with respect to the disc, and a control circuit including an address memory for storing the newest one of the addresses read from the disc, a counter operative to count addresses at predetermined time intervals for producing a signal representative of an expected address indicative of the position to which the pickup unit is expected to move in the next, the expected address being updated at predetermined time intervals, a detector circuit to produce a signal each time a discrepancy is found to exist between the newest address and the expected address. In response to the signal from the detector circuit, the pickup drive means is actuated to drive the pickup unit for movement to the position dictated by the newest address or the expected address.

    摘要翻译： 一种光盘播放器，包括信号拾取单元，用于从盘上读取包含地址信息的节目信息的信息，信号拾取单元可相对于盘移动;拾取驱动装置，用于驱动拾取单元相对于 盘，以及包括用于存储从盘读取的最新地址的地址存储器的控制电路，用于以预定时间间隔对地址进行计数的计数器，用于产生代表指示拾取器的位置的预期地址的信号 预期单元在下一个移动，预期地址以预定的时间间隔更新，检测器电路每当在最新地址和预期地址之间存在差异时产生信号。 响应于来自检测器电路的信号，拾取器驱动装置被致动以驱动拾取单元移动到由最新地址或预期地址指定的位置。

    Noise reduction system
    5.
    发明授权
    Noise reduction system 失效
    降噪系统

    公开(公告)号：US4476502A

    公开(公告)日：1984-10-09

    申请号：US411996

    申请日：1982-08-27

    申请人： Kazuo Watanabe ,  Yasuo Kominami ,  Yoshiyuki Takizawa ,  Akira Haeno

    发明人： Kazuo Watanabe ,  Yasuo Kominami ,  Yoshiyuki Takizawa ,  Akira Haeno

    IPC分类号： H04B1/62 ,  G11B20/04 ,  H03G9/02 ,  H04B1/64 ,  G11B5/45 ,  G11B5/02

    CPC分类号： H03G9/025

    摘要： A noise reduction system is provided which can operate as either a Dolby B-type or C-type system. In either case, an input signal is applied to the variable impedance of a high-level side chain through an identical shared filter circuit network. The high-level side chain has two voltage-current converters for controlling the variable impedance. By substantially inhibiting the operation of one of the two converters, the system operates as a C-type Dolby system. On the other hand, when the system operates as a B-type Dolby system, a bias current is applied to each of the two converters during periods of no input signal. This bias current is about half of a minute bias control current which is applied during no signal periods to the single converter used when the system operates as the C-type Dolby system.

    摘要翻译： 提供了可以作为杜比B型或C型系统工作的降噪系统。 在任一情况下，通过相同的共享滤波器电路网络将输入信号施加到高级侧链的可变阻抗。 高级侧链具有两个用于控制可变阻抗的电压 - 电流转换器。 通过基本上禁止两个转换器之一的操作，该系统作为C型杜比系统工作。 另一方面，当系统作为B型杜比系统工作时，在没有输入信号的周期期间，将两个转换器中的每一个施加偏置电流。 该偏置电流是当系统作为C型杜比系统工作时，在无信号周期期间施加到单个转换器的一分钟偏置控制电流的大约一半。

    Pickup level control device for a system for reading out recorded information
    8.
    发明授权
    Pickup level control device for a system for reading out recorded information 失效
    用于读出记录信息的系统的拾取液位控制装置

    公开(公告)号：US4558213A

    公开(公告)日：1985-12-10

    申请号：US499357

    申请日：1983-05-31

    申请人： Koki Aizawa ,  Yoshiyuki Takizawa ,  Akira Haeno ,  Akira Motoyama

    发明人： Koki Aizawa ,  Yoshiyuki Takizawa ,  Akira Haeno ,  Akira Motoyama

    IPC分类号： G11B7/13 ,  G11B7/12 ,  G11B20/10 ,  H03G3/20 ,  H01J40/14

    CPC分类号： H03G3/3084 ,  G11B20/10527 ,  H03G3/3015

    摘要： A pickup level control device for a system for reading out recorded information which has a pickup element producing a pickup output signal. The device detects a dc component of the pickup output signal and produces a level control signal. A voltage level of the pickup output signal is controlled in response to the level control signal produced by the dc level detection operation. The control of the voltage level of the pickup output signal is performed by a variable impedance element connected to a terminal of the pickup element, so that a peak level of an ac component of the pickup output signal is controlled below a predetermined level.

    摘要翻译： 一种用于读出具有产生拾取输出信号的拾取元件的记录信息的系统的拾取液位控制装置。 该装置检测拾取器输出信号的直流分量并产生电平控制信号。 响应于由直流电平检测操作产生的电平控制信号来控制拾取器输出信号的电压电平。 拾取器输出信号的电压电平的控制由连接到拾取元件的端子的可变阻抗元件执行，使得拾取输出信号的交流分量的峰值电平被控制在预定水平以下。

    Level shifting circuit
    9.
    发明授权
    Level shifting circuit 失效
    电平转换电路

    公开(公告)号：US4551642A

    公开(公告)日：1985-11-05

    申请号：US472331

    申请日：1983-03-04

    申请人： Koki Aizawa ,  Akira Haeno

    发明人： Koki Aizawa ,  Akira Haeno

    IPC分类号： H03F3/50 ,  H03F1/30 ,  H03F3/34 ,  H03F3/343 ,  H03K5/003 ,  H03K5/08 ,  H03G3/20

    CPC分类号： H03F3/343 ,  H03F1/302

    摘要： A level-shifting circuit is arranged such that the amount of level-shifting is controlled so that the DC requirement of a succeeding circuit may be satisfied. In particular, negative feedback control of the amount of level shift results in a constant zero DC potential being maintained at the circuit output.

    摘要翻译： 电平移动电路被布置成使得电平移位量被控制，使得可以满足后续电路的DC要求。 特别地，电平偏移量的负反馈控制导致在电路输出端保持恒定的零直流电位。

    Amplifier circuit
    10.
    发明授权
    Amplifier circuit 失效
    放大器电路

    公开(公告)号：US4510458A

    公开(公告)日：1985-04-09

    申请号：US409051

    申请日：1982-08-18

    申请人： Tetsuo Sato ,  Yasuo Kominami ,  Yoshiyuki Takizawa ,  Akira Haeno

    发明人： Tetsuo Sato ,  Yasuo Kominami ,  Yoshiyuki Takizawa ,  Akira Haeno

    IPC分类号： H03F1/34 ,  H03F1/32 ,  H03F3/45

    CPC分类号： H03F1/3223

    摘要： An amplifier circuit has an operational amplifier and a negative feedback circuit. An input signal is applied to the non-inverting input terminal of the operational amplifier, whereby a first output signal is provided from the output terminal of the operational amplifier. The first output signal is fed back to the inverting input terminal of the operational amplifier through the negative feedback circuit. The negative feedback signal of the negative feedback circuit is fed back to the inverting input terminal through an impedance converter. Thus, a second output signal of low distortion factor is derived from the output terminal of the impedance converter.

    摘要翻译： 放大器电路具有运算放大器和负反馈电路。 输入信号被施加到运算放大器的非反相输入端，由此从运算放大器的输出端提供第一输出信号。 第一输出信号通过负反馈电路反馈到运算放大器的反相输入端。 负反馈电路的负反馈信号通过阻抗转换器反馈到反相输入端。 因此，从阻抗转换器的输出端导出低失真因子的第二输出信号。