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公开(公告)号：US06664816B1
公开(公告)日：2003-12-16
申请号：US10207943
申请日：2002-07-30
申请人： Tri Nguyen , Kenneth G. Richardson
发明人： Tri Nguyen , Kenneth G. Richardson
IPC分类号： H03K5153
CPC分类号： H03K5/153
摘要： A signal amplitude comparator which includes a first input that receives an input signal and generates an output signal that is a non-linear function of the input signal, and a second input circuit that receives a reference input signal and generates a second output signal that generally tracks process, temperature and supply variation. The signal amplitude comparator also includes an amplifier, a filter and a comparator. The amplifier amplifies a signal difference between the first and second output signals and outputs a train of pulses if a peak of the input signal exceeds the reference input signal. A second reference signal is applied to the comparator which generates an output which indicates whether the input signal exceeds a pre-determined threshold value. The signal amplitude comparator also includes a pair of input amplifiers which receive and translate the input and reference input signals to levels suitable for the input circuits.
摘要翻译： 一种信号幅度比较器，包括接收输入信号并产生作为输入信号的非线性函数的输出信号的第一输入端，以及接收参考输入信号并产生通常的第二输出信号的第二输入电路的信号幅度比较器 跟踪过程，温度和供应变化。 信号幅度比较器还包括放大器，滤波器和比较器。 放大器放大第一和第二输出信号之间的信号差，如果输入信号的峰值超过参考输入信号，则输出一串脉冲。 第二参考信号被施加到比较器，该比较器产生指示输入信号是否超过预定阈值的输出。 信号幅度比较器还包括一对输入放大器，其接收和平移输入和参考输入信号到适合于输入电路的电平。
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公开(公告)号：US06621299B1
公开(公告)日：2003-09-16
申请号：US09849640
申请日：2001-05-04
申请人： Todd A. Randazzo , Matthew J. Russell , Kenneth S. Szajda , Jonathan A. Schmitt , Kenneth G. Richardson , Timothy P. McGonagle
发明人： Todd A. Randazzo , Matthew J. Russell , Kenneth S. Szajda , Jonathan A. Schmitt , Kenneth G. Richardson , Timothy P. McGonagle
IPC分类号： H03K1900
CPC分类号： H03K19/003
摘要： An integrated circuit having input output buffers, where the integrated circuit is powered by at least a core power supply and an input output power supply. A level shifter receives an active low signal that indicates that the core power supply has powered down. The level shifter then outputs a known state upon receipt of the active low signal. A control circuit receives the known state form the level shifter, and then tristates the input output buffers upon receipt of the known state.
摘要翻译： 一种具有输入输出缓冲器的集成电路，其中集成电路至少由核心电源和输入输出电源供电。 电平移位器接收到指示核心电源已断电的低电平有效信号。 然后，电平移位器在接收到有效低电平信号时输出已知状态。 控制电路接收电平移位器的已知状态，然后在接收到已知状态时将输入输出缓冲器三态化。
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13.发明授权Hysteresis removal for positioning systems with variable backlash and stiction 失效具有可变间隙和静摩擦的定位系统的滞后消除
公开(公告)号：US5764018A
公开(公告)日：1998-06-09
申请号：US536295
申请日：1995-09-29
CPC分类号： G05B19/40
摘要： A system and method for reducing non-repeatable positioning errors. Non-repeatable positioning errors caused by the effects stiction and backlash in the mechanical system are reduced by "shaking" or vibrating the positioning system in a controlled manner. After the system input is set to the desired value, the positioning system is "shaken" by inputting a series of offsets that oscillate around the desired location and gradually decrease in amplitude, eventually reaching zero. In a specific embodiment, a lead screw is threaded through a follower nut which is connected to a magnetic tape read/write head. The lead screw is rotated by a mechanical transmission which provides gear reduction from a computer controlled stepper motor. The tape head's non-repeatable positioning error is reduced by alternately stepping the stepper motor in opposite directions a specified number of steps and periodically reducing the specified number of steps until zero is eventually reached.
摘要翻译： 一种用于减少不可重复定位误差的系统和方法。 通过以受控的方式“摆动”或振动定位系统来减少机械系统中的影响固定和反冲引起的不可重复的定位误差。 在将系统输入设置为所需值之后，通过输入一系列在期望位置周围振荡的偏移并逐渐减小振幅，最终达到零，使定位系统“摇动”。 在具体实施例中，导螺杆穿过连接到磁带读/写头的从动螺母。 导螺杆通过机械传动器旋转，该机械传动装置从计算机控制的步进电机提供齿轮减速。 通过将步进电机以相反的方向交替地步进指定数量的步骤，并且周期性地减少指定的步数，直到最终达到零，从而减少了磁带头的不可重复的定位误差。
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公开(公告)号：US5716018A
公开(公告)日：1998-02-10
申请号：US768262
申请日：1996-12-17
IPC分类号： G11B23/087
CPC分类号： G11B23/08757
摘要： A tape guide for a digital tape mini-cartridge providing decreased tape wander in a direction transverse to the intended path. The guide provides an increased area of tape having increased transverse stiffness without interfering with an adjacent drive wheel. In one embodiment, the guide is cylindrical and has a cylindrical cut-out to provide clearance for an adjacent cylindrical drive wheel. Preferably, the guide has top and bottom flanges. If a top flange of the guide is present, the cut-out continues through the top flange of the guide. The top flange of the guide may be relatively thin to fit below a top flange of the adjacent drive wheel. Alternatively, the top flange of the guide may have a larger cut-out to avoid interference with the top flange.
摘要翻译： 用于数字磁带小型磁带的磁带导轨，其提供减小的磁带在横向于预期路径的方向上漂移。 该引导件提供了具有增加的横向刚度而不干扰相邻驱动轮的带的增加区域。 在一个实施例中，导向件是圆柱形的并且具有圆柱形切口以为相邻的圆柱形驱动轮提供间隙。 优选地，导向件具有顶部和底部凸缘。 如果存在引导件的顶部凸缘，则切口将继续穿过引导件的顶部法兰。 引导件的顶部凸缘可以相对较薄，以配合在相邻驱动轮的顶部凸缘下方。 或者，引导件的顶部凸缘可以具有较大的切口以避免与顶部凸缘的干涉。
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15.发明授权Differential current amplifier with common mode rejection and high frequency boost 失效差分电流放大器具有共模抑制和高频率提升公开(公告)号：US06864748B2
公开(公告)日：2005-03-08
申请号：US10357166
申请日：2003-01-31
CPC分类号： H03F3/45179
摘要： An amplifier for a differential signal drain is able to amplify a signal over a frequency range and boost the signal within a specified frequency range. A resistor is placed between the drain and gate of the first transistor of a cascode amplifier and can be selected to provide additional signal boost at a specified input frequency. An additional input transistor may be added to provide a stepped amplification over the frequency range. The amplifier is further able to reject common mode signals by using regulating transistors.
摘要翻译： 用于差分信号漏极的放大器能够在频率范围上放大信号，并在特定频率范围内提升信号。 电抗器放置在共源共栅放大器的第一晶体管的漏极和栅极之间，并且可以被选择以在指定的输入频率处提供额外的信号提升。 可以添加附加的输入晶体管以在频率范围上提供阶梯式放大。 放大器还能够通过使用调节晶体管来抑制共模信号。
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公开(公告)号：US06784745B2
公开(公告)日：2004-08-31
申请号：US10357030
申请日：2003-01-31
IPC分类号： H03F304
摘要： A current amplifier has a variable resistor or capacitor to provide a high frequency boost. Additionally, additional transistors may be switched in and out of the circuit to provide different gains at lower frequency. The combination of variable resistors or capacitors and the switchable transistors provides control over the low frequency gain of the amplifier and the transition region from low gain to higher gain.
摘要翻译： 电流放大器具有可变电阻器或电容器以提供高频率增益。 此外，另外的晶体管可以被切换进入电路以及从电路中提供，以便在较低频率下提供不同的增益。 可变电阻器或电容器以及可切换晶体管的组合提供了对放大器的低频增益和从低增益到较高增益的过渡区域的控制。
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17.发明授权Low-profile tape drive with an external-rotor motor directly driving a cartridge capstan 失效带有外转子马达的薄型磁带驱动器直接驱动墨盒主导轴
公开(公告)号：US5878934A
公开(公告)日：1999-03-09
申请号：US822316
申请日：1997-03-21
IPC分类号： G11B15/26 , G11B15/28 , G11B15/675 , H02K5/173 , H02K5/18 , H02K7/10 , H02K9/02 , B65H20/00 , G03B1/04 , G03B23/02 , H02K9/00
摘要： A tape drive for a data tape mini-cartridge. Cartridges of interest have an internal capstan for an internal drive belt driven by a drive roller in the tape drive. The tape drive has a drive roller directly on a rotating exterior surface of the motor. In one example embodiment, the motor has an external rotor. In an example embodiment, no part of the motor diameter extends below or above the data cartridge. No intermediate rollers or belts are required. The motor stator is preferably mounted onto a metal support plate for heat conduction from the stator into the support plate. The motor preferably has space between the rotor and the support plate for air to flow into the stator for convection cooling. In addition, the motor rotor preferably includes cooling fins and air flow holes for additional convection cooling. A spring is mounted between the motor support plate and a chassis to provide a force holding the drive roller against the cartridge capstan.
摘要翻译： 数据磁带小型磁带机的磁带机。 感兴趣的墨盒具有用于由磁带驱动器中的驱动辊驱动的内部驱动皮带的内部主导轴。 磁带驱动器具有直接位于电动机旋转外表面上的驱动辊。 在一个示例性实施例中，电动机具有外部转子。 在一个示例性实施例中，电机直径的任何部分不延伸到数据盒的下方或上方。 不需要中间辊或皮带。 电动机定子优选安装在金属支撑板上，用于从定子热传导到支撑板中。 电动机优选地在转子和支撑板之间具有空间，用于空气流入定子以进行对流冷却。 此外，电机转子优选地包括用于附加对流冷却的冷却片和空气流通孔。 弹簧安装在电动机支撑板和底盘之间，以提供将驱动辊保持抵靠盒主轴的力。
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公开(公告)号：US5699487A
公开(公告)日：1997-12-16
申请号：US499152
申请日：1995-07-07
CPC分类号： G11B20/10518 , G11B20/10009 , G11B5/09 , H04L25/03165 , H04L7/02 , H04L2025/03464 , H04L7/0062 , H04L7/10
摘要： A magnetic read channel employs an artificial neural network for reconstruction of a recorded magnetic signal and its corresponding synchronization signal. A magnetic read head receives magnetic signals from a magnetic recording media such as a magnetic tape or disk and converts it to an electronic signal. A preamplifier receives and amplifies the electronic signal from the magnetic read head to produce an amplified electronic signal. A delay line receives the amplified electronic signal from the preamplifier, storing delayed successive representations of the received signal. An artificial neural network receives the delayed successive representations from the delay line for reconstruction of the originally recorded data signal. Prior to use in an application, the artificial neural network is trained via a training method with a known training set of corresponding simultaneously generated data and clock pairs. Training the network with data having such known clock (synchronization) signal enables extraction of the synchronization signal from its nonlinear properties hidden within its corresponding data.
摘要翻译： 磁读取通道采用人造神经网络来重建记录的磁信号及其对应的同步信号。 磁读头从诸如磁带或磁盘的磁记录介质接收磁信号，并将其转换为电子信号。 前置放大器接收并放大来自磁读头的电子信号，以产生放大的电子信号。 延迟线从前置放大器接收放大的电子信号，存储接收信号的延迟的连续表示。 人造神经网络从延迟线接收延迟的连续表示，用于重建原始记录的数据信号。 在应用程序中使用之前，人造神经网络通过具有对应的同时生成的数据和时钟对的已知训练集合的训练方法进行训练。 用具有这种已知时钟（同步）信号的数据训练网络能够从隐藏在其相应数据内的非线性特征提取同步信号。
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公开(公告)号：US5698860A
公开(公告)日：1997-12-16
申请号：US282120
申请日：1994-07-28
CPC分类号： G11B15/602
摘要： A position sensor for providing an electronic output indicating the magnitude of transverse movement of an edge of a magnetic tape. A first light pipe and lens arrangement is used to deliver light to one side of a tape. A second light pipe with a small light receiving aperture is used to receive light and to deliver the received light to a detector. The focal point for the lens in the first light pipe is at the receiving aperture of the second light pipe, enabling the aperture to be very small but still receive substantially all the transmitted light. The light pipe arrangement enables use of a variety of light sources and light detectors without having to place either a source or a detector physically close to the tape or the magnetic head.
摘要翻译： 一种位置传感器，用于提供指示磁带边缘的横向运动幅度的电子输出。 第一个光管和透镜装置用于将光传送到胶带的一侧。 使用具有小光接收孔的第二光管来接收光并将接收到的光传送到检测器。 第一光管中的透镜的焦点在第二光管的接收孔处，使得光圈非常小，但仍基本接收所有的透射光。 光管布置使得能够使用各种光源和光检测器，而不必将源或检测器物理地靠近磁带或磁头。
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20.发明授权Calibration of circuitry for media verification in a magnetic data recording device 失效在磁数据记录装置中用于媒体验证的电路校准
公开(公告)号：US5361175A
公开(公告)日：1994-11-01
申请号：US40760
申请日：1993-03-31
CPC分类号： G11B20/1816 , G11B20/10009
摘要： A system and method for calibrating amplifier gain and a comparator threshold for use in verification of magnetic media integrity in a magnetic data storage device. Commercially available read data processors are used which have an amplifier with controllable gain and a comparator with an internal indirectly-controllable threshold. An on-board voltage reference is provided for gain calibration. The calibrated gain is used to provide signals with known peak values for calibrating the comparator threshold. In one embodiment, the numeric control value for the threshold is reduced from a calibrated peak value to a specified fraction for media verification. In a second embodiment, the gain is reduced to the industry specified fraction and the threshold is calibrated to match peak signal magnitudes at the reduced gain. The gain is then returned to the calibrated level for media verification.
摘要翻译： 用于校准放大器增益的系统和方法以及用于验证磁数据存储装置中的磁性介质完整性的比较器阈值。 使用具有可控增益的放大器和具有内部间接可控阈值的比较器的市售读数据处理器。 提供车载电压基准用于增益校准。 校准增益用于提供具有已知峰值的信号，用于校准比较器阈值。 在一个实施例中，用于阈值的数值控制值从校准的峰值减小到媒体验证的指定分数。 在第二实施例中，将增益减小到工业规定的分数，并且校准阈值以匹配减小的增益处的峰值信号幅度。 然后将增益返回到校准级别进行媒体验证。
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