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1. 发明授权

US4803442A Low power buffer amplifier 失效
标题翻译：低功率缓冲放大器
公开(公告)号：US4803442A
公开(公告)日：1989-02-07
申请号：US120610
申请日：1987-11-16
申请人： Dennis Hogg
发明人： Dennis Hogg
IPC分类号： H03F1/32 , H03F3/30 , H03F3/26
CPC分类号： H03F3/3081 , H03F1/3217 , H03F3/3088
摘要： A current amplifier is provided with three active transistors of the same polarity type, which function to amplify the input signal at a wide range of frequencies, with low power consumption and low or no output crossover distortion. One transistor, in cooperation with the second transistor, significantly amplifies the current during one swing of the input singal while the third transistor is switched off, and switches on the third transistor just prior to a reversal of the input signal swing. By the proper and immediate biasing of the third transistor according to the circuit needs, low power consumption as well as low or zero output crossover distortion is achieved.
摘要翻译：电流放大器具有相同极性类型的三个有源晶体管，其功能是在宽的频率范围内放大输入信号，具有低功耗和低或无输出交叉失真。与第二晶体管配合的一个晶体管在第三晶体管截止时在输入信号的一个摆幅期间显着地放大电流，并且在输入信号摆幅反转之前就开启第三晶体管。通过根据电路需要适当且立即地偏置第三晶体管，实现了低功耗以及低或零输出交越失真。

2. 发明授权

US4947093A Shock resistant winchester disk drive 失效
标题翻译：耐冲击硬化盘驱动器
公开(公告)号：US4947093A
公开(公告)日：1990-08-07
申请号：US276299
申请日：1988-11-25
申请人： Ericson M. Dunstan , Dennis Hogg , John E. Scura , Ming-Goei Sheu
发明人： Ericson M. Dunstan , Dennis Hogg , John E. Scura , Ming-Goei Sheu
IPC分类号： G11B5/55 , G11B7/09
CPC分类号： G11B7/0946 , G11B5/5582
摘要： A shock resistant hard disk drive system employs a plurality of magnetic disks for recording data, a plurality of magnetic heads for performing input/output operation on the magnetic disks, with at least one of the magnetic heads being used as a servo head, a head-positioning mechanism for controlling the movement of the magnetic heads, a servo control mechanism or servo loop for opposing shifts in the location of the servo head, detecting device for detecting and measuring certain accelerations applied to the system, and filtering device for filtering the output of said detecting device and for providing the signal to the head-positioning mechanism. The detecting device detects and measures the magnitude of internal or external accelerations or shocks applied to the system, and provides the necessary signals to counter such accelerations. The pre-existing phase locked loop includes a voltage controlled oscillator, with the voltage control signal applied to the oscillator indicating instantaneous rotational velocity resulting from accelerations applied to the system; and this control signal is modified and applied to servo loop for the head positioner, to hold the head positioner against shifting off track.
摘要翻译：抗冲击硬盘驱动系统采用多个用于记录数据的磁盘，用于在磁盘上进行输入/输出操作的多个磁头，其中至少一个磁头用作伺服磁头，磁头用于控制磁头移动的定位机构，伺服控制机构或伺服环路，用于伺服头位置的相对位移，用于检测和测量施加到系统的某些加速度的检测装置，以及用于过滤输出的过滤装置并且用于将信号提供给头部定位机构。检测装置检测和测量施加到系统的内部或外部加速度或冲击的大小，并提供必要的信号来对抗这种加速度。预先存在的锁相环包括压控振荡器，电压控制信号施加到振荡器，指示由施加到系统的加速度引起的瞬时旋转速度; 并且该控制信号被修改并应用于头部定位器的伺服环路，以保持头部定位器不偏离轨道。

3. 发明授权

US08422172B1 Actuator trace through a die 有权
标题翻译：致动器跟踪通过一个模具
公开(公告)号：US08422172B1
公开(公告)日：2013-04-16
申请号：US12895854
申请日：2010-10-01
申请人： Housan Dakroub , Dennis Hogg
发明人： Housan Dakroub , Dennis Hogg
IPC分类号： G11B5/48
CPC分类号： G11B5/4846 , G11B5/483
摘要： A disk drive is disclosed. The disk drive comprises a disk, a head configured to write data to and read data from the disk, and an actuator configured to position the head relative to the disk. The disk drive also comprises a die including internal circuitry electrically coupled to the head and a bypass trace electrically coupled to the actuator, wherein the internal circuitry comprises one or more preamplifiers and the bypass trace is electrically isolated from the internal circuitry.
摘要翻译：公开了一种磁盘驱动器。磁盘驱动器包括一个磁盘，头部，被配置为向磁盘写入数据和从盘读取数据;以及致动器，被配置为将磁头相对于磁盘定位。磁盘驱动器还包括芯片，其包括电耦合到磁头的内部电路和电耦合到致动器的旁路迹线，其中内部电路包括一个或多个前置放大器，并且旁路迹线与内部电路电隔离。

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