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1. 发明授权

US6023145A Head and disk tester with a thermal drift-compensated closed-loop positioning system 有权
标题翻译：具有热漂移补偿闭环定位系统的头盘测试仪
公开(公告)号：US6023145A
公开(公告)日：2000-02-08
申请号：US295912
申请日：1999-04-21
申请人： Ufuk Karaaslan , Ilia Bokchtein , Anatoli Stein , Nahum Guzik , Alexander Varlakhanov
发明人： Ufuk Karaaslan , Ilia Bokchtein , Anatoli Stein , Nahum Guzik , Alexander Varlakhanov
IPC分类号： G11B21/08 , G11B5/455 , G11B5/55 , G11B5/596 , G11B21/10 , G11B5/58
CPC分类号： G11B5/455 , G11B5/5552 , G11B5/5565 , G11B5/596
摘要： The head/disk tester of the invention has a housing 43 that houses spindle 44 that rotatingly supports a magnetic disk 31. The housing supports a moveable carriage 30 that, in turn, supports a magnetic head 32. Positioning means 39 and 41 are used to move the carriage and the magnetic head across the magnetic disk. These positioning means include stepper motors that realize coarse positioning of the magnetic head, and a piezo actuator 37 that is used for fine positioning. Linear encoders 40 and 42 located at both sides of the carriage provide feedback information to a closed-loop positioning system that controls the piezo actuator. A set of special signals ("servo bursts") pre-written at a given track of the magnetic disk is used as an additional source of feedback information for the same closed-loop positioning system. This positioning system includes a servo analyzer 45 that reads and processes servo burst signals from the magnetic disk, and a position controller 49 that controls the piezo actuator. The controller contains two control loops: a proportional-integral-derivative (PID) loop and an additional servo burst loop. During any movement of the magnetic head to a prescribed command position, the servo burst feedback is turned off, and feedback from linear encoders is used by the PID loop to move the head. When the magnetic head reaches the prescribed command position, servo burst loop is turned on; it changes the command position of the PID loop in a way to keep the ratio of pre-written burst signals constant. As a result, the position of the magnetic head with respect to the data track remains the same for as long as necessary, even in unstable temperature conditions.
摘要翻译：本发明的头/盘测试器具有壳体43，其容纳旋转地支撑磁盘31的心轴44.壳体支撑可移动滑架30，滑动架30又支撑磁头32.定位装置39和41用于将滑架和磁头移动到磁盘上。这些定位装置包括实现磁头粗略定位的步进马达和用于精细定位的压电致动器37。位于滑架两侧的线性编码器40和42向控制压电致动器的闭环定位系统提供反馈信息。预先写在磁盘的给定轨道上的一组特殊信号（“伺服脉冲串”）用作相同闭环定位系统的附加反馈信息源。该定位系统包括从磁盘读取和处理伺服脉冲串信号的伺服分析器45以及控制压电致动器的位置控制器49。控制器包含两个控制回路：比例积分微分（PID）回路和附加的伺服脉冲串回路。在任何磁头移动到规定的指令位置时，伺服脉冲串反馈被关闭，PID回路使用线性编码器的反馈来移动磁头。当磁头达到规定的指令位置时，伺服脉冲串环路导通; 它以保持预写脉冲串信号的比例恒定的方式改变PID循环的命令位置。结果，即使在不稳定的温度条件下，磁头相对于数据轨道的位置也保持相同。

2. 发明授权

US06236201B1 Magnetic head and disk tester with pitch correction 有权
标题翻译：带磁头校正的磁头和磁盘测试仪
公开(公告)号：US06236201B1
公开(公告)日：2001-05-22
申请号：US09241512
申请日：1999-02-01
申请人： Cem Kilicci , Nahum Guzik , Ufuk Karaaslan
发明人： Cem Kilicci , Nahum Guzik , Ufuk Karaaslan
IPC分类号： G01R3312
CPC分类号： G11B5/56 , G11B5/455 , G11B5/4806 , G11B5/5552
摘要： A magnetic head and disk tester provides accurate positioning of a magnetic read-write head over a magnetic disk by means of a coarse positioning mechanism and a fine positioning mechanism. The coarse positioning mechanism includes a stepper motor, a lead screw, a nut, rear sliders and a housing. The fine positioning mechanism includes a piezoelectric actuator, slides and a carriage. The positioning displacements are along a linear axis, which lies on a horizontal plane. The carriage is connected to the housing via the fine positioning mechanism, which then moves the carriage with respect to the housing. Two pairs of linear encoders are mounted on the carriage about the axis and measure the position of the magnetic read-write head with respect to the magnetic disk. Each pair is mounted such that the pairs lie in separate horizontal planes. One linear encoder on each pair is mounted to the right of the magnetic read-write head and the other to the left of it, the magnetic read-write head being equal distances from the two linear encoders of each pair. The magnetic read-write head is mounted on the carriage with an offset from each pair of linear encoders in the vertical direction. Pitch during the fine positioning movement causes the head to move a different amount than that measured by any one of the pairs of linear encoders. By using both pairs of encoders, the amount of pitch is determined. A feedback circuit responsive to that determination causes the fine positioned to move the head to the correct pitch.
摘要翻译：磁头和磁盘测试仪通过粗略定位机构和精细定位机构在磁盘上精确定位磁读写头。粗定位机构包括步进电机，导螺杆，螺母，后滑块和壳体。精细定位机构包括压电致动器，滑块和托架。定位位移沿线性轴线位于水平面上。滑架通过精细定位机构连接到壳体，然后精细定位机构使托架相对于壳体移动。两对线性编码器围绕轴安装在托架上，并测量磁读写头相对于磁盘的位置。每对安装成使得这些对位于分开的水平平面中。每对上的一个线性编码器安装在磁读写头的右侧，另一个安装在其左侧，磁读写头与每对两个线性编码器的距离相等。磁读写头安装在滑架上，在每一对线性编码器上沿垂直方向偏移。在精细定位运动期间的间距导致头部移动与由任何一对线性编码器测量的量不同的量。通过使用两对编码器，确定音高量。响应于该确定的反馈电路使精细定位将头移动到正确的音调。

3. 发明授权

US06242910B1 Magnetic head and disk tester with yaw correction 失效
标题翻译：具有偏航校正的磁头和磁盘测试仪
公开(公告)号：US06242910B1
公开(公告)日：2001-06-05
申请号：US09241510
申请日：1999-02-01
申请人： Nahum Guzik , Cem Kilicci , Ilia M. Bokchtein , Ufuk Karaaslan
发明人： Nahum Guzik , Cem Kilicci , Ilia M. Bokchtein , Ufuk Karaaslan
IPC分类号： G11B548
CPC分类号： G11B5/4806 , G11B5/455 , G11B5/5552 , G11B5/56
摘要： A magnetic head and disk tester includes a magnetic head which is selectively positioned relative to a rotatably mounted magnetic disk to accomplish testing of either of the head or disk or both. The magnetic head is secured to a carriage which is under electro-mechanical control, wherein displacement of the carriage causes a corresponding displacement of the head relative to the disk and, to some degree, may cause yaw in the carriage. Measurements of the linear position of a left and a right side of the carriage are detected, measured, and fed back to a control system. The control system responds to a difference between a desired command position and the actual position of each side of the carriage and causes actuators to adjust the position of each side of the carriage until the difference, and thereby the yaw, is substantially eliminated. Additionally, during a positioning operation, vibrations in the yaw direction are decreased, which decreases a corresponding settling time of the magnetic head.
摘要翻译：磁头和磁盘测试器包括磁头，其相对于可旋转地安装的磁盘选择性地定位，以完成磁头或磁盘或两者的测试。磁头被固定在机电控制下的滑架上，其中滑架的位移导致磁头相对于磁盘的相应位移，并且在一定程度上可能导致滑架中的偏航。检测，测量并反馈到控制系统的滑架的左侧和右侧的线性位置的测量。控制系统响应期望的指令位置和滑架的每一侧的实际位置之间的差异，并且使致动器调节滑架的每一侧的位置，直到基本上消除了差异，从而偏航。此外，在定位操作期间，偏航方向的振动减小，这降低了磁头的相应的建立时间。

4. 发明授权

US5382887A Method and apparatus for compensating positioning error in magnetic-head and magnetic-disk tester 失效
标题翻译：用于补偿磁头和磁盘测试仪定位误差的方法和装置
公开(公告)号：US5382887A
公开(公告)日：1995-01-17
申请号：US36975
申请日：1993-03-25
申请人： Nahum Guzik , Ufuk Karaaslan , Boris Slutsky
发明人： Nahum Guzik , Ufuk Karaaslan , Boris Slutsky
IPC分类号： G11B5/58 , G11B5/55 , G11B5/84 , G11B21/10 , G11B33/10 , G11B5/54
CPC分类号： G11B5/5534 , G11B33/10
摘要： A magnetic head and disk tester which has linear encoders (40 and 42) installed on lateral sides of a carriage (30) which carries a magnetic head (34), movable in a radial direction along a hard disk. Positions of the magnetic head with respect to the hard disk are measured by means of the linear encoders which are arranged on both lateral sides of the carriage. Outputs of the encoders are supplied to an arithmetic unit (45) which calculates the arithmetic mean of the encoder's outputs and transmits the resulting signal via a feedback line (47) to a piezoelectric translator (37). The translator is the final drive element in the carriage-drive system and is used for fine positioning of the carriage. Thus, if during positioning of the magnetic head the latter is installed in an erroneous position, e.g., because of yawing which may result from asymmetrical friction on both sides of the carriage, the feedback-positioning system composed of the encoders, the arithmetic unit, and the piezoelectric translator calculates the error and shifts the carriage in a direction opposite to the error to the correct position.
摘要翻译：一种磁头和磁盘测试仪，其具有安装在滑架（30）的侧面上的线性编码器（40和42），所述滑架承载可沿着硬盘在径向方向上移动的磁头（34）。磁头相对于硬盘的位置通过布置在滑架两侧的线性编码器来测量。编码器的输出被提供给计算编码器输出的算术平均值的运算单元（45），并通过反馈线（47）将结果信号发送到压电转换器（37）。翻译器是托架驱动系统中的最终驱动元件，用于滑架的精细定位。因此，如果在磁头的定位期间，后者被安装在错误的位置，例如由于可能由滑架的两侧上的不对称摩擦导致的偏航，由编码器，运算单元组成的反馈定位系统，并且压电转换器计算误差并将滑架沿与错误相反的方向移动到正确的位置。

5. 发明授权

US6006614A Apparatus and method for improving dynamic characteristics of a fine-positioning mechanism in a magnetic head/disk tester 失效
标题翻译：用于改善磁头/磁盘测试仪中的精细定位机构的动态特性的装置和方法
公开(公告)号：US6006614A
公开(公告)日：1999-12-28
申请号：US44301
申请日：1998-03-19
申请人： Nahum Guzik , Ufuk Karaaslan , Cem Kilicci
发明人： Nahum Guzik , Ufuk Karaaslan , Cem Kilicci
IPC分类号： G11B5/012 , G11B5/455 , G11B21/02 , G11B21/10 , G01N17/00
CPC分类号： G11B5/012 , G11B5/455
摘要： An improved fine positioning mechanism in a magnetic head/disk tester includes a primary position actuator and a primary body that supports a read/write head to be tested, and an auxiliary body and auxiliary actuator. Both actuators operate contemporaneously and in mutually opposite directions. The masses of both bodies and the stiffnesses of both actuators are selected so that a ratio of the stiffness of the actuator to the mass of the body in the primary system is equal to a ratio of the stiffness of the actuator to the mass in the auxiliary system. In addition, the masses of both bodies and the expansion coefficients of both actuators are selected so that a product of the mass of the body with the expansion coefficient of the actuator in the primary system is equal to a product of the mass of the body with the expansion coefficient of the actuator in the auxiliary system. In this manner, forces operating on both bodies are equal in magnitude and opposite in direction and therefore counterbalance each other when the same control voltage is applied to both actuators. This, in turn, eliminates or reduces vibrations in the slide supporting the actuators and therefore the head-positioning settling time is significantly reduced.
摘要翻译：磁头/磁盘测试仪中的改进的精细定位机构包括主位置致动器和支撑待测试的读/写头的主体以及辅助主体和辅助致动器。两个执行器同时和相互相反的方向运行。两个致动器的质量和刚度被选择为使得致动器的刚度与主系统中的主体质量的比值等于致动器的刚度与辅助件中的质量的比率系统。另外，两主体的质量和两个致动器的膨胀系数被选择，使得主体的主体的膨胀系数与主体系中的致动器的膨胀系数的乘积等于体的质量与辅助系统中执行器的膨胀系数。以这种方式，在两个主体上操作的力在幅度上是相等的，并且在相同的控制电压被施加到两个致动器上时彼此相互平衡。这又反过来消除或减少支撑致动器的滑块中的振动，因此头部定位稳定时间显着减小。

6. 发明授权

US08077426B2 Magnetic disk centering method and system 有权
标题翻译：磁盘定心方法及系统
公开(公告)号：US08077426B2
公开(公告)日：2011-12-13
申请号：US12638545
申请日：2009-12-15
申请人： Nahum Guzik , Sergey Korepanov , Alexander Varlakhanov
发明人： Nahum Guzik , Sergey Korepanov , Alexander Varlakhanov
IPC分类号： G11B21/02 , G11B5/58
CPC分类号： G11B5/00
摘要： A system and method are described for aligning a data axis of one or more circular data-bearing tracks on an annular surface region of a magnetic media-bearing disk, with a spin axis of a spindle of a spinstand or a disk drive. The data axis is perpendicular to the surface region of the disk and the data tracks are concentric with respect to a data axis.
摘要翻译：描述了一种系统和方法，用于将磁性介质承载盘的环形表面区域上的一个或多个圆形数据承载轨道的数据轴与纺锤台或磁盘驱动器的主轴的旋转轴线对准。数据轴垂直于盘的表面区域，数据轨迹相对于数据轴是同心的。

7. 发明申请

US20110141608A1 MAGNETIC DISK CENTERING METHOD AND SYSTEM 有权
标题翻译：磁盘中心方法与系统
公开(公告)号：US20110141608A1
公开(公告)日：2011-06-16
申请号：US12638545
申请日：2009-12-15
申请人： Nahum Guzik , Sergey Korepanov , Alexander Varlakhanov
发明人： Nahum Guzik , Sergey Korepanov , Alexander Varlakhanov
IPC分类号： G11B21/02
CPC分类号： G11B5/00
摘要： A system and method are described for aligning a data axis of one or more circular data-bearing tracks on an annular surface region of a magnetic media-bearing disk, with a spin axis of a spindle of a spinstand or a disk drive. The data axis is perpendicular to the surface region of the disk and the data tracks are concentric with respect to a data axis.
摘要翻译：描述了一种系统和方法，用于将磁性介质承载盘的环形表面区域上的一个或多个圆形数据承载轨道的数据轴与纺锤台或磁盘驱动器的主轴的旋转轴线对准。数据轴垂直于盘的表面区域，数据轨迹相对于数据轴是同心的。

8. 发明授权

US06772079B2 Method and apparatus for equalization of a signal acquisition system 有权
标题翻译：信号采集系统均衡的方法和装置
公开(公告)号：US06772079B2
公开(公告)日：2004-08-03
申请号：US10082963
申请日：2002-02-26
申请人： Anatoli Stein , Nahum Guzik
发明人： Anatoli Stein , Nahum Guzik
IPC分类号： G01D1800
CPC分类号： H03M1/1038 , G01D18/008 , H03M1/124
摘要： In a signal acquisition system in accordance with the principles of the present invention, a digital signal acquisition system includes a front end, an equalizer and an output system. The front end typically includes an input amplifier and may include one or more preamplifiers, and any one of various input probes. The probes may be directed toward different applications, that is, voltage probes or current probes, for example, and may include preamplifiers that adjust the range of input signals. The output of the probe is typically routed to an input amplifier, which may include various filters and/other signal conditioning circuitry. The system also includes an analog to digital converter that is arranged to receive a conditioned analog input signal from the input amplifier. The analog to digital converter converts the conditioned analog input signal to digitized input signal. The equalizer accepts the digitized input signal and filters the signal to produce a signal that has been compensated for inadequacies in the signal acquisition system's front end. Coefficients for the equalizer are determined and stored within the system during a calibration process. The calibration process employs a model signal acquisition system and the target signal acquisition system to determine a transfer function difference between the systems and uses this difference to compute the equalization coefficients.
摘要翻译：在根据本发明的原理的信号采集系统中，数字信号采集系统包括前端，均衡器和输出系统。前端通常包括输入放大器，并且可以包括一个或多个前置放大器以及各种输入探针中的任何一个。探针可以指向不同的应用，例如电压探针或电流探针，并且可以包括调节输入信号范围的前置放大器。探头的输出通常被路由到输入放大器，其可以包括各种滤波器和/其他信号调节电路。该系统还包括模数转换器，其被配置为从输入放大器接收经调节的模拟输入信号。模数转换器将经调节的模拟输入信号转换为数字化输入信号。均衡器接受数字化的输入信号并对信号进行滤波，以产生信号采集系统前端的不足之处。在校准过程中，均衡器的系数被确定并存储在系统内。校准过程采用模型信号采集系统和目标信号采集系统来确定系统之间的传递函数差异，并使用该差异来计算均衡系数。

9. 发明授权

US07830217B1 Method and system of vector signal generator with direct RF signal synthesis and parallel signal processing 有权
标题翻译：矢量信号发生器的方法和系统，具有直接RF信号合成和并行信号处理
公开(公告)号：US07830217B1
公开(公告)日：2010-11-09
申请号：US12276718
申请日：2008-11-24
申请人： Anatoli Stein , Semen Volfbeyn , Nahum Guzik
发明人： Anatoli Stein , Semen Volfbeyn , Nahum Guzik
IPC分类号： H03C3/00 , H04L27/20
CPC分类号： H04L27/362 , H04L27/365
摘要： A vector signal generator with direct RF signal synthesis is disclosed. The vector signal generator comprises an RF signal synthesizer, a switch, and a memory. The RF signal synthesizer is configured for converting baseband IQ signals into a modulated digital RF signal. The RF signal synthesizer is connected to an I input, a Q input, a clock input, a control input, and an output, where the clock input is a clock input of the vector signal generator, the control input is a control input of the vector signal generator, and the output is an RF signal output of the vector signal generator. The switch is configured for selecting a source of IQ signals and is connected to an external I input, an external Q input, a stored signal I input, a stored signal Q input, the control input, an I output, and a Q output. The external I input and external Q input are external IQ inputs to the vector signal generator and the I output and the Q output are connected to the I input and the Q input of the RF signal synthesizer. The memory is configured for storing IQ signals samples, said memory being connected to the control input and having a stored I output, connected to the stored signal I input, and a stored Q output connected to the stored signal Q input.
摘要翻译：公开了一种具有直接RF信号合成的矢量信号发生器。矢量信号发生器包括RF信号合成器，开关和存储器。 RF信号合成器被配置用于将基带IQ信号转换成调制的数字RF信号。 RF信号合成器连接到I输入，Q输入，时钟输入，控制输入和输出，其中时钟输入是矢量信号发生器的时钟输入，控制输入是矢量信号发生器，输出是矢量信号发生器的RF信号输出。开关配置为选择IQ信号源，并连接到外部I输入，外部Q输入，存储信号I输入，存储信号Q输入，控制输入，I输出和Q输出。外部I输入和外部Q输入是矢量信号发生器的外部IQ输入，I输出和Q输出连接到RF信号合成器的I输入和Q输入。存储器被配置为存储IQ信号样本，所述存储器连接到控制输入并且具有连接到存储的信号I输入的存储的I输出和连接到存储的信号Q输入的存储的Q输出。

10. 发明授权

US06219683B1 Radially distributed transverse filter 失效
标题翻译：径向分布横向滤波器
公开(公告)号：US06219683B1
公开(公告)日：2001-04-17
申请号：US09124129
申请日：1998-07-29
申请人： Nahum Guzik , Anatoli Stein
发明人： Nahum Guzik , Anatoli Stein
IPC分类号： G06F1710
CPC分类号： H03H17/0219 , H03H17/06
摘要： A radially distributed transverse filter includes a plurality of delay lines of substantially equal electric length sequentially coupled at a like plurality of nodes. The nodes are distributed equidistant from a common position, for example positioned at vertices of a polygon. A plurality of attenuators are distributed radially about the common position and coupled between the nodes and the common position. An adder is located substantially at the common position for summing the attenuator outputs. In this manner, the respective propagation delays of each tap are substantially similar, and imprecision due to variation in propagation delay is therefore mitigated and/or substantially eliminated. The invention has application to high-frequency digital and analog transverse filters, for example filters for equalizers used in Partial Response Maximum Likelihood (PRML) circuits employed in contemporary magnetic recording systems.
摘要翻译：径向分布的横向滤波器包括基本相等的电长度的多条延迟线，其依次耦合在相同的多个节点处。节点从公共位置等距分布，例如位于多边形的顶点。多个衰减器围绕公共位置径向分布并且在节点和公共位置之间耦合。加法器基本上位于用于对衰减器输出求和的公共位置。以这种方式，每个抽头的相应传播延迟基本相似，因此减小和/或基本上消除了由于传播延迟的变化引起的不精确性。本发明适用于高频数字和模拟横向滤波器，例如用于当代磁记录系统中使用的部分响应最大似然（PRML）电路中的均衡器的滤波器。

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