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    • 1. 发明授权
    • Fixed sample rate sampled amplitude read channel for zoned magnetic
recording
    • 固定采样率采样幅度读取通道用于分区磁记录
    • US5812336A
    • 1998-09-22
    • US567682
    • 1995-12-05
    • Mark S. SpurbeckWilliam G. BlissHoward H. Sheerin
    • Mark S. SpurbeckWilliam G. BlissHoward H. Sheerin
    • G11B5/012G11B5/09G11B5/596G11B20/10G11B20/12G11B20/14
    • G11B20/10055G11B20/10009G11B20/10037G11B20/10064G11B20/10074G11B20/1403G11B5/012G11B5/59688G11B20/1258G11B2020/1282G11B5/09G11B5/59655
    • A sampled amplitude read channel reads user data and embedded servo data stored on a magnetic medium by detecting digital data from a sequence of discrete time interpolated sample values. A write frequency synthesizer generates a write clock for writing digital data to the magnetic medium at a predetermined baud rate for a selected zone, and upon read back, a read frequency synthesizer generates a fixed sampling clock at a frequency slightly higher than the write frequency at the outer zone. A sampling device samples the analog read signal at this fixed sampling rate across the data zones and servo wedges to generate a sequence of discrete time channel samples that are not synchronized to the baud rate. Before sampling, an analog receive filter processes the read signal to attenuate aliasing noise without having to adjust its spectrum across data zones or servo wedges. A discrete time equalizing filter equalizes the channel samples according to a predetermined partial response (PR4, EPR4, EEPR4, etc.). An interpolating timing recovery circuit, responsive to the equalized channel samples, computes an interpolation interval .tau. and, in response thereto, generates interpolated sample values substantially synchronized to the baud rate. The timing recovery circuit also generates a synchronous data clock for clocking a discrete time sequence detector and pulse detector which detect the digital user and servo data from the interpolated sample values.
    • 采样幅度读取通道通过从离散时间内插样本值的序列中检测数字数据来读取存储在磁性介质上的用户数据和嵌入式伺服数据。 写入频率合成器产生写入时钟,用于以预定波特率向所选择的区域向磁性介质写入数字数据,并且在读回时,读取频率合成器以略高于写入频率的频率产生固定采样时钟 外部区域。 采样设备以固定采样率对数据区和伺服楔进行采样,以产生不与波特率同步的离散时间通道采样序列。 在采样之前,模拟接收滤波器处理读取信号以衰减混叠噪声,而不必在数据区或伺服楔上调整其频谱。 离散时间均衡滤波器根据预定的部分响应(PR4,EPR4,EEPR4等)均衡信道样本。 内插定时恢复电路响应于均衡信道采样,计算内插间隔τ,并且响应于此产生基本上与波特率同步的内插采样值。 定时恢复电路还产生用于计时离散时间序列检测器和脉冲检测器的同步数据时钟,其从内插样本值检测数字用户和伺服数据。
    • 6. 发明授权
    • Magnetic disc recording system employing two stage actuators for
simultaneous accesses through multiple recording heads
    • 磁盘记录系统采用两级致动器,通过多个记录头进行同时访问
    • US5901010A
    • 1999-05-04
    • US796310
    • 1997-02-07
    • Neal GloverHoward H. SheerinPaul M. RomanoJohn Schadegg
    • Neal GloverHoward H. SheerinPaul M. RomanoJohn Schadegg
    • G11B5/588G11B5/592G11B20/10G11B20/14G11B20/20B07B1/28
    • G11B20/10055G11B20/10009G11B20/10037G11B20/1403G11B20/20G11B5/588G11B5/5921G11B5/5926
    • A magnetic disc storage system employing two stage actuators for simultaneously positioning recording heads over the top and bottom surfaces of the disc is disclosed. The recording heads are fastened to a distal end of respective top and bottom load beams. A base end of the load beams is connected to a voice coil motor (VCM) rotary actuator which simultaneously positions both recording heads over the disc. A silicon microactuator is also fastened to the distal end of at least one of the load beams for positioning the recording heads independent of one another, thereby allowing simultaneous tracking of embedded servo data. Various data formats are provided, including interleaving logical sector numbers, symbols of a logical sector, and segments of a logical sector, between the top and bottom physical sectors of a track. Complexity and cost of the servo controllers is reduced through the use of sliding mode control: a simple, robust and fast control system implemented using simple switching circuitry, small lookup tables, and simplified binary multipliers (shift registers). A dual path read channel implemented in a single integrated circuit is provided for parallel processing the read signals from the top and bottom recording heads.
    • 公开了一种使用两级致动器的磁盘存储系统,用于将记录头同时定位在盘的顶表面和底表面上。 记录头被固定到相应的顶部和底部负载梁的远端。 负载梁的基端连接到音圈电机(VCM)旋转致动器,其同时将两个记录头定位在盘上。 硅微型致动器也被固定到至少一个负载梁的远端,用于彼此独立地定位记录头,从而允许同时跟踪嵌入式伺服数据。 提供各种数据格式,包括在磁道的顶部和底部物理扇区之间交织逻辑扇区号,逻辑扇区的符号和逻辑扇区的段。 通过使用滑动模式控制,减少了伺服控制器的复杂性和成本:使用简单的开关电路,小型查找表和简化的二进制乘法器(移位寄存器)实现的简单,稳健和快速的控制系统。 提供了在单个集成电路中实现的双路读取通道,用于并行处理来自顶部和底部记录头的读取信号。
    • 10. 发明申请
    • SYSTEM AND SOFTWARE FOR AUTOMATING AN INFORMATION DISCLOSURE STATEMENT
    • 用于自动发布信息披露声明的系统和软件
    • US20090150424A1
    • 2009-06-11
    • US11953071
    • 2007-12-09
    • Howard H. Sheerin
    • Howard H. Sheerin
    • G06F7/00G06F15/16
    • G06Q10/10G06F2216/11
    • A method is disclosed for automating an information disclosure statement (IDS). A reference id is sent over a network to a patent database site, and reference data is received over the network from the patent database site corresponding to the reference id. The reference data is imported into an IDS file using Adobe Acrobat. In one embodiment the method is performed by an applicant computer communicating with a patent database site (e.g., a web site), and in an alternative embodiment, an applicant computer communicates with an intermediate site (e.g., a web site) which communicates with the patent database site. Another embodiment of the present invention comprises a computer readable storage medium storing code segments for implementing the method.
    • 公开了一种自动化信息披露声明(IDS)的方法。 参考ID通过网络发送到专利数据库站点,并且通过网络从参考ID对应的专利数据库站点接收参考数据。 使用Adobe Acrobat将引用数据导入到IDS文件中。 在一个实施例中,该方法由与专利数据库站点(例如,网站)通信的申请人计算机执行,并且在替代实施例中,申请人计算机与中间站点(例如,网站)进行通信,该中间站点 专利数据库站点。 本发明的另一个实施例包括存储用于实现该方法的代码段的计算机可读存储介质。