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6 条记录 (耗时 0.026 秒)

    Servo circuit for a signal reproducing apparatus
    1.
    发明授权
    Servo circuit for a signal reproducing apparatus 失效
    用于信号再现装置的伺服电路

    公开(公告)号：US4580255A

    公开(公告)日：1986-04-01

    申请号：US499245

    申请日：1983-05-31

    申请人： Shigeki Inoue ,  Takao Arai ,  Yukio Fukui ,  Takashi Takeuchi ,  Harushige Nakagaki ,  Masafumi Nakamura ,  Tatsuo Baba

    发明人： Shigeki Inoue ,  Takao Arai ,  Yukio Fukui ,  Takashi Takeuchi ,  Harushige Nakagaki ,  Masafumi Nakamura ,  Tatsuo Baba

    IPC分类号： G11B7/09 ,  G11B19/04 ,  G11B20/10 ,  G11B21/10 ,  G11B7/00

    CPC分类号： G11B21/106 ,  G11B19/04 ,  G11B20/10 ,  G11B7/0941 ,  G11B7/0945 ,  G11B7/0948

    摘要： A servo circuit for a signal reproducing apparatus for reproducing signals from a record medium such as a disc utilizing an optical pickup, wherein a variable gain amplifier is arranged in a servo loop between a pickup and an actuator so that the pickup is caused to track a signal track in accordance with a servo error signal produced by the variable gain amplifier. A playback condition of a disc is discriminated by detecting the number of errors in a signal reproduced from a recorded signal on the disc by the pickup, and a gain of the variable gain amplifier is controlled by the discrimination output so that the variation of the servo error signal caused by a difference in reflectance between individual discs is eliminated and a loop gain appropriate to an individual disc is automatically set.

    摘要翻译： 一种用于信号再现装置的伺服电路，用于使用光学拾取器从诸如盘的记录介质再现信号，其中可变增益放大器布置在拾取器和致动器之间的伺服环路中，使得拾取器跟踪 根据由可变增益放大器产生的伺服误差信号的信号轨迹。 通过由拾取器检测从盘上的记录信号再现的信号中的错误数来识别盘的重放条件，并且通过鉴别输出来控制可变增益放大器的增益，使得伺服 消除由各个光盘之间的反射率差引起的误差信号，并且自动设置适合于单个光盘的环路增益。

    Audio frequency power amplifier
    2.
    发明授权
    Audio frequency power amplifier 失效
    音频功率放大器

    公开(公告)号：US4100501A

    公开(公告)日：1978-07-11

    申请号：US767963

    申请日：1977-02-11

    申请人： Harushige Nakagaki ,  Tohru Sampei ,  Nobutaka Amada ,  Tatsuo Baba

    发明人： Harushige Nakagaki ,  Tohru Sampei ,  Nobutaka Amada ,  Tatsuo Baba

    IPC分类号： H03F1/02 ,  H03F3/30 ,  H03F3/26

    CPC分类号： H03F1/0244 ,  H03F3/3076

    摘要： An audio frequency power amplifier wherein an input signal is applied to respective input electrodes of a pair of transistors of the same conductivity type to produce an output signal at an output electrode of one of the pair of transistors. A common electrode of the one transistor is connected with an output electrode of the other transistor and a power from a first D.C. power supply is supplied to the junction thereof through a diode while a power is supplied to a common electrode of the other transistor from a second D.C. power supply having a higher voltage than that of the first D.C. power supply. The other transistor and the diode are alternately rendered conductive and non-conductive in response to the signal level of the input signal, a capacitor is connected to the input electrode of the other transistor, which capacitor is charged during the turn-off of the other transistor whereby the charge is supplied to the other transistor upon turning on of the other transistor to shorten the rise time.

    摘要翻译： 一种音频功率放大器，其中输入信号被施加到相同导电类型的一对晶体管的相应输入电极，以在该对晶体管之一的输出电极处产生输出信号。 一个晶体管的公共电极与另一个晶体管的输出电极连接，并且来自第一直流电源的功率通过二极管被提供给其结，同时从另一个晶体管的公共电极向 第二直流电源的电压高于第一直流电源的电压。 另一个晶体管和二极管响应于输入信号的信号电平交替地导通和不导通，电容器连接到另一个晶体管的输入电极，该电容器在另一个晶体管的截止期间被充电 晶体管，由此在另一晶体管导通时将电荷提供给另一晶体管以缩短上升时间。

    Read-only memory and method of manufacturing the same
    4.
    发明授权
    Read-only memory and method of manufacturing the same 失效
    只读存储器及其制造方法

    公开(公告)号：US4630237A

    公开(公告)日：1986-12-16

    申请号：US759009

    申请日：1985-07-24

    申请人： Kenji Miura ,  Shigeru Nakajima ,  Kazushige Minegishi ,  Toshifumi Somatani ,  Takashi Morie ,  Tatsuo Baba

    发明人： Kenji Miura ,  Shigeru Nakajima ,  Kazushige Minegishi ,  Toshifumi Somatani ,  Takashi Morie ,  Tatsuo Baba

    IPC分类号： G11C17/08 ,  H01L21/8246 ,  H01L21/8247 ,  H01L27/10 ,  H01L27/112 ,  H01L27/115 ,  H01L29/78 ,  G11C11/40 ,  G11C13/00

    CPC分类号： H01L29/7827 ,  H01L2924/0002 ,  Y10S257/903

    摘要： A read-only memory has memory cells each with a vertical metal oxide semiconductor field effect transistor and a bit line. The vertical metal oxide semiconductor field effect transistor has a gate electrode serving as a word line, a source, a drain, and a vertical channel region between the source and drain constituted by first and second diffusion layers. The gate electrode is formed on a side wall of a trench, which has a pair of side walls substantially perpendicular to a major surface of a semiconductor substrate of a first conductivity type and an interconnecting bottom surface substantially perpendicular to the side wall surfaces. The first and second diffusion layers of a second conductivity type are formed in an upper portion of the semiconductor substrate and in a bottom of the trench, respectively. The bit lines are formed in a predetermined pattern. One of the first and second diffusion layers is connected to the bit line through a contact hole and the other of the first and second diffusion layers is used as a common current line. A method of manufacturing the read-only memory is also proposed.

    摘要翻译： 只读存储器具有各自具有垂直金属氧化物半导体场效应晶体管和位线的存储单元。 垂直金属氧化物半导体场效应晶体管具有用作由第一和第二扩散层构成的源极和漏极之间的字线，源极，漏极和垂直沟道区的栅电极。 栅电极形成在沟槽的侧壁上，沟槽的侧壁具有基本上垂直于第一导电类型的半导体衬底的主表面的一对侧壁和基本上垂直于侧壁表面的互连底表面。 第二导电类型的第一和第二扩散层分别形成在半导体衬底的上部和沟槽的底部。 位线以预定图案形成。 第一和第二扩散层中的一个通过接触孔连接到位线，并且第一和第二扩散层中的另一个用作公共电流线。 还提出了制造只读存储器的方法。

    Protective circuit for electroacoustic transducer with hall element and voice coil temperature rise time constant circuit
    5.
    发明授权
    Protective circuit for electroacoustic transducer with hall element and voice coil temperature rise time constant circuit 失效
    具有霍尔元件和音圈温升时间恒定电路的电声换能器保护电路

    公开(公告)号：US4163119A

    公开(公告)日：1979-07-31

    申请号：US834901

    申请日：1977-09-20

    申请人： Tatsuo Baba ,  Yoshito Ohmura ,  Hiroshi Fukushima ,  Hideo Fukuma

    发明人： Tatsuo Baba ,  Yoshito Ohmura ,  Hiroshi Fukushima ,  Hideo Fukuma

    IPC分类号： H03F1/52 ,  H02H1/00 ,  H03F1/42 ,  H04R3/00

    CPC分类号： H02H1/0007 ,  H04R3/007

    摘要： The output signal of an l-f (low-frequency) power amplifier is supplied to an electroacoustic transducer, through an inductive element for preventing parasitic oscillation, to cause the inductive element to generate a magnetic flux whose density depends on the output current signal of the power amplifier while a current according to the magnitude of the output voltage signal of the power amplifier is supplied to the current input terminals of a Hall-effect element disposed in the magnetic field induced by the inductive element, so that a voltage according to the output power of the l-f power amplifier is taken out of the output terminals of the Hall-effect element. When the voltage exceeds a predetermined level, the l-f signal supplied to the electroacoustic transducer is attenuated by a signal attenuating circuit so that the transducer is prevented from being damaged.

    摘要翻译： lf（低频）功率放大器的输出信号通过用于防止寄生振荡的电感元件提供给电声换能器，使感应元件产生一个磁通量，其密度取决于功率的输出电流信号 放大器，而根据功率放大器的输出电压信号的大小的电流被提供给设置在由感应元件感应的磁场中的霍尔效应元件的电流输入端，使得根据输出功率的电压 的功率放大器从霍尔效应元件的输出端子中取出。 当电压超过预定值时，提供给电声换能器的l-f信号被信号衰减电路衰减，从而防止换能器被损坏。