知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

74 条记录 (耗时 0.015 秒)

    Self switching head damping
    2.
    发明授权
    Self switching head damping 失效
    自动开关头阻尼

    公开(公告)号：US5363249A

    公开(公告)日：1994-11-08

    申请号：US839351

    申请日：1992-02-20

    申请人： Michael Fitzmorris

    发明人： Michael Fitzmorris

    IPC分类号： G11B5/027 ,  G11B5/00 ,  G11B5/02 ,  G11B5/09 ,  G11B19/02 ,  G11B20/10 ,  H03K17/16 ,  H03K17/66 ,  G11B15/12

    CPC分类号： G11B5/022 ,  G11B19/02 ,  G11B20/10009 ,  G11B5/02 ,  H03K17/16 ,  H03K17/662 ,  G11B2005/0013

    摘要： An apparatus for damping the ringing effects across the output terminals of a read/write circuit during write operation is described. The present invention introduces a first continuous damping resistance across the inductive load of the read/write head during the write operation, and automatically removes the damping resistance during the read operation. The circuit of the present invention also allows for a second damping resistance suitable for read mode attenuation to be placed directly across the output terminals. The equivalent damping resistance during the write mode is then the resistance of the second damping resistor in parallel with the resistance of the first damping resistor. The damping resistance causes exponential damping of the ringing signal elements, thereby reducing the settling time of the circuit and increasing the operating frequency range.

    摘要翻译： 描述了一种用于在写入操作期间阻止读/写电路的输出端子上的振铃效应的装置。 本发明在写入操作期间在读/写头的电感负载上引入第一连续阻尼电阻，并且在读取操作期间自动消除阻尼电阻。 本发明的电路还允许适于读取模式衰减的第二阻尼电阻直接放置在输出端子两端。 在写入模式期间的等效阻尼电阻是第二阻尼电阻器与第一阻尼电阻器的电阻并联的电阻。 阻尼电阻引起振铃信号元件的指数衰减，从而减少电路的稳定时间并增加工作频率范围。

    Bipolar H write driver
    3.
    发明授权
    Bipolar H write driver 失效
    双极H写驱动

    公开(公告)号：US5291069A

    公开(公告)日：1994-03-01

    申请号：US991864

    申请日：1992-12-15

    申请人： Gary F. Gooding ,  Larry L. Tretter

    发明人： Gary F. Gooding ,  Larry L. Tretter

    IPC分类号： H03K17/00 ,  H03K17/66 ,  H03K17/687 ,  H03K17/60 ,  H03K3/01

    CPC分类号： H03K17/662 ,  H03K17/6874 ,  H03K2217/0036

    摘要： An improved driver design including a plurality of NPN bipolar driver transistors connected in an H configuration including at least one bipolar upper drive transistor. A novel circuit is included for driving the upper NPN bipolar driver transistor. In a particular implementation, the circuit for driving the upper bipolar drive transistor is adapted to sense the output of the drive transistor and regulate a voltage at the input thereof in response thereto to keep the drive transistor out of saturation. Thus, power dissipation is minimized by using an H configuration and high speed is afforded by using bipolar drive transistors and by keeping the drive transistors out of saturation.

    摘要翻译： 一种改进的驱动器设计，包括连接在包括至少一个双极上驱动晶体管的H配置中的多个NPN双极性驱动晶体管。 包括一个新的电路用于驱动上部NPN双极驱动晶体管。 在特定实现中，用于驱动上双极驱动晶体管的电路适于感测驱动晶体管的输出并响应于该输入调节其输入端的电压以保持驱动晶体管不饱和。 因此，通过使用H配置使功耗最小化，并且通过使用双极性驱动晶体管并且通过保持驱动晶体管不饱和来提供高速度。

    Low power differential ECL line driver
    4.
    发明授权
    Low power differential ECL line driver 失效
    低功率差分ECL线路驱动器

    公开(公告)号：US4795916A

    公开(公告)日：1989-01-03

    申请号：US6183

    申请日：1987-01-23

    申请人： John E. Liron

    发明人： John E. Liron

    IPC分类号： H03K19/086 ,  H03K17/66 ,  H03K19/018 ,  H03K5/22

    CPC分类号： H03K17/662 ,  H03K19/01831

    摘要： A low power, differential ECL line driver has a switching network that applies a constant current source as the emitter load to only one of the output transistors at a time while applying a constant current source to the base of the other output transistor.

    摘要翻译： 低功率，差分ECL线路驱动器具有开关网络，其将恒定电流源作为发射极负载一次施加到一个输出晶体管，同时将恒定电流源施加到另一个输出晶体管的基极。

    Electric switch operation monitoring circuitry
    5.
    发明授权
    Electric switch operation monitoring circuitry 失效
    电开关运行监控电路

    公开(公告)号：US4322769A

    公开(公告)日：1982-03-30

    申请号：US219080

    申请日：1980-12-22

    申请人： Evert S. Cooper

    发明人： Evert S. Cooper

    IPC分类号： G11C11/14 ,  G01R31/02 ,  H02M3/337 ,  H02M7/5387 ,  H03K17/00 ,  H03K17/08 ,  H03K17/18 ,  H03K17/66 ,  G08B21/00

    CPC分类号： H03K17/08 ,  H02M3/3372 ,  H02M7/53871 ,  H03K17/18 ,  H03K17/662

    摘要： This switch monitoring circuitry is particularly applicable to switching circuitry for operating a bipolar load device, frequently an inductor, on a source of direct current with four switches arranged to alternate the polarity of potential across the load device in a predetermined periodicity. Such circuitry often is arranged with diode devices individually connected across the switches, especially where the load device is an inductor. The monitoring circuitry specifically described comprises basic logical circuitry having coincidence gating circuits for activating status indicating circuitry; or for controlling associated circuitry for protecting or for compensating the switching circuitry; or for alarming operating personnel of malfunctioning switches.

    摘要翻译： 该开关监视电路特别适用于用于在直流电源上操作双极性负载装置（通常为电感器）的开关电路，其中四个开关被布置为以预定周期性交替负载装置的电位极性。 这种电路通常布置成具有分别连接在开关上的二极管器件，特别是在负载器件是电感器的地方。 具体描述的监视电路包括具有用于激活状态指示电路的一致门控电路的基本逻辑电路; 或用于控制用于保护或补偿开关电路的相关电路; 或用于报警操作人员故障开关。

    High speed driving circuit for producing two in-phase and two out-of-phase signals
    6.
    发明授权
    High speed driving circuit for producing two in-phase and two out-of-phase signals 失效
    用于生产两个相位和两个相位相位信号的高速驱动电路

    公开(公告)号：US3828206A

    公开(公告)日：1974-08-06

    申请号：US34029773

    申请日：1973-03-12

    申请人： RCA CORP

    发明人： ZUK B

    IPC分类号： H03K17/66

    CPC分类号： H03K17/662

    摘要： The circuit includes four transistors, each transistor being connected at its emitter to a different one of four switches arranged in a bridge configuration. The four transistors are paired, each pair including a first transistor connected at its emitter to the collector of the second transistor. The conduction of the first transistor of one pair and of the second transistor of the other pair is controlled by the same signal and the conduction of the second transistor of said one pair and the first transistor of the other pair is controlled by the complement of said signal. The two transistors of each pair produce complementary signals at their emitters and conduct current for all signal conditions.

    摘要翻译： 该电路包括四个晶体管，每个晶体管在其发射极处连接到以桥式配置布置的四个开关中的不同的一个。 四个晶体管成对，每对包括在其发射极处连接到第二晶体管的集电极的第一晶体管。 一对的第一晶体管和另一对的第二晶体管的导通由相同的信号控制，并且所述一对的第二晶体管的导通和另一对的第二晶体管的导通由所述一对的互补来控制 信号。 每对的两个晶体管在其发射极处产生互补信号，并对所有信号条件传导电流。

    Digital magnetic recording circuit bidirectional load switching having higher load voltage at time of reversal
    7.
    发明授权
    Digital magnetic recording circuit bidirectional load switching having higher load voltage at time of reversal 失效
    数字磁记录电路在逆时针转换时具有较高的负载电压

    公开(公告)号：US3602739A

    公开(公告)日：1971-08-31

    申请号：US3602739D

    申请日：1969-04-16

    申请人： WESTINGHOUSE ELECTRIC CORP

    发明人： PATTANTYUS TAMAS I

    IPC分类号： H03K17/041 ,  H03K17/66 ,  H03K17/64

    CPC分类号： H03K17/662 ,  H03K17/04113

    摘要： A circuit is disclosed for reversing the current through an inductive element, such as a coil of a magnetic recording head used for digital recording, wherein two pairs of translating devices, such as transistors, are utilized with the inductive element being connected between a first device of each pair so that current flows from a first operating voltage source in opposite directions through the inductive element depending upon which device is conductive. The second device of the respective pairs is turned on when the current through the inductive element is to be reversed so as to connect a second operating voltage source to the inductive element and cause the rapid reversal of current therethrough.

    Low power output driver
    10.
    发明申请
    Low power output driver 有权
    低功率输出驱动器

    公开(公告)号：US20050127955A1

    公开(公告)日：2005-06-16

    申请号：US10886850

    申请日：2004-07-08

    申请人： Nanci Martinez ,  Seth Everton ,  Erick Hirata ,  Lloyd Linder

    发明人： Nanci Martinez ,  Seth Everton ,  Erick Hirata ,  Lloyd Linder

    IPC分类号： H03K17/66 ,  H03K19/018 ,  H03B1/00

    CPC分类号： H03K19/01812 ,  H03K17/662

    摘要： An output driver. The novel output driver includes a first circuit for receiving an input signal and in accordance therewith generating an output signal at an output node, a second circuit for applying a variable current to the output node, and a third circuit for controlling the magnitude of the variable current in accordance with the input signal. In an illustrative embodiment, the third circuit is adapted to generate a controlling current in accordance with the input signal, and the second circuit includes a current mirror adapted to receive the controlling current and output a scaled version of the controlling current to the output node.

    摘要翻译： 输出驱动程序 新颖的输出驱动器包括用于接收输入信号并根据其在输出节点处产生输出信号的第一电路，用于向输出节点施加可变电流的第二电路和用于控制变量的幅度的第三电路 电流根据输入信号。 在说明性实施例中，第三电路适于根据输入信号产生控制电流，并且第二电路包括适于接收控制电流的电流镜，并将控制电流的缩放版本输出到输出节点。