Method and apparatus to limit DC-level in coded data
    41.
    发明授权
    Method and apparatus to limit DC-level in coded data 有权
    限制编码数据中直流电平的方法和装置

    公开(公告)号:US08098447B1

    公开(公告)日:2012-01-17

    申请号:US12022131

    申请日:2008-01-29

    IPC分类号: G11B5/02

    摘要: In a perpendicular magnetic recording system, the data that is being written by the write channel is fed back into the read channel. The read channel processes the data and decides if the written sequence is likely to have very poor DC characteristics. If that is the case, the write channel changes a scrambler seed and rewrites the data using the new scrambler seed. The data may also be inspected for patterns that might cause large baseline wander before being written to disk, i.e., in the write channel. A data sequence may be repeatedly scrambled and encoded until an acceptable level of estimated DC-wander has been achieved. The data sequence may then be written to disk.

    摘要翻译: 在垂直磁记录系统中,由写通道写入的数据被反馈到读通道。 读通道处理数据并确定写入序列是否可能具有非常差的DC特性。 如果是这种情况,则写入通道改变加扰器种子并使用新的加扰器种子重写数据。 还可以检查数据,以便在写入磁盘之前,即在写入通道中可能导致大的基线漂移的模式。 数据序列可以被重复地加扰和编码,直到达到可接受的估计DC漂移水平。 然后可以将数据序列写入磁盘。

    System and method for controlling gain and timing phase in a presence of a first least mean square filter using a second adaptive filter
    42.
    发明授权
    System and method for controlling gain and timing phase in a presence of a first least mean square filter using a second adaptive filter 有权
    用于使用第二自适应滤波器在存在第一最小均方滤波器的情况下控制增益和定时相位的系统和方法

    公开(公告)号:US08081720B1

    公开(公告)日:2011-12-20

    申请号:US12372832

    申请日:2009-02-18

    申请人: Pantas Sutardja

    发明人: Pantas Sutardja

    IPC分类号: H04L27/06

    摘要: A communication system includes a variable gain amplifier (VGA) that receives an input signal. An analog-to-digital converter (ADC) receives an output of the VGA. A first filter responsive to an output of the ADC, the first filter includes N tap weight coefficients. A first least mean square (LMS) engine updates the N tap weight coefficients of the first filter. A second filter responsive to an output of the first filter, the second filter including M tap weight coefficients, wherein N is greater than M. An adaptation engine updates a first tap weight coefficient of the second filter based on a value of the first tap weight coefficient for a next sampling time of the input signal, a value of the first tap weight coefficient for a current sampling time of the input signal, a first gain constant, and a change in timing phase error of the first filter.

    摘要翻译: 通信系统包括接收输入信号的可变增益放大器(VGA)。 模拟 - 数字转换器(ADC)接收VGA的输出。 响应于ADC的输出的第一滤波器,第一滤波器包括N个抽头加权系数。 第一最小均方(LMS)引擎更新第一滤波器的N个抽头加权系数。 响应于第一滤波器的输出的第二滤波器,第二滤波器包括M抽头权重系数,其中N大于M.适配引擎基于第一抽头权重的值来更新第二滤波器的第一抽头加权系数 输入信号的下一个采样时间的系数,第一抽头加权系数,输入信号的当前采样时间的值,第一增益常数和第一滤波器的定时相位误差的变化。

    Flash memory with coding and signal processing
    43.
    发明授权
    Flash memory with coding and signal processing 有权
    具有编码和信号处理的闪存

    公开(公告)号:US08055979B2

    公开(公告)日:2011-11-08

    申请号:US11598178

    申请日:2006-11-08

    IPC分类号: G11C29/00

    摘要: A solid state non-volatile memory unit includes, in part, an encoder, a multi-level solid state non-volatile memory array adapted to store data encoded by the encoder, and a decoder adapted to decode the data retrieved from the memory array. The memory array may be a flash EEPROM array. The memory unit optionally includes a modulator and a demodulator. The data modulated by the modulator is stored in the memory array. The demodulator demodulates the modulated data retrieved from the memory array.

    摘要翻译: 固态非易失性存储器单元部分地包括编码器,适用于存储由编码器编码的数据的多级固态非易失性存储器阵列,以及适于对从存储器阵列检索的数据进行解码的解码器。 存储器阵列可以是闪存EEPROM阵列。 存储器单元可选地包括调制器和解调器。 由调制器调制的数据被存储在存储器阵列中。 解调器解调从存储器阵列检索的调制数据。

    Track counting system and method for recordable optical media
    44.
    发明授权
    Track counting system and method for recordable optical media 有权
    跟踪计数系统和可记录光学介质的方法

    公开(公告)号:US08054715B1

    公开(公告)日:2011-11-08

    申请号:US11710759

    申请日:2007-02-26

    申请人: Pantas Sutardja

    发明人: Pantas Sutardja

    IPC分类号: G11B7/00

    CPC分类号: G11B7/08541

    摘要: A tracking system for an optical drive includes a focus error module. The focus error module generates a focus error signal based on a difference between a first sensor output signal and a second sensor output signal, which are based on a reflected portion of a laser beam that is reflected by an optical storage medium. A control module generates a tracking signal based on the focus error signal.

    摘要翻译: 用于光学驱动器的跟踪系统包括聚焦误差模块。 聚焦误差模块基于第一传感器输出信号和第二传感器输出信号之间的差产生聚焦误差信号,其基于由光存储介质反射的激光束的反射部分。 控制模块基于聚焦误差信号产生跟踪信号。

    System and Method of Tuning Current for LEDs
    45.
    发明申请
    System and Method of Tuning Current for LEDs 审中-公开
    调节LED电流的系统和方法

    公开(公告)号:US20110266976A1

    公开(公告)日:2011-11-03

    申请号:US13099042

    申请日:2011-05-02

    IPC分类号: H05B37/02

    摘要: An apparatus includes a LED and a regulator circuit. The regulator circuit controls the current provided to the LED according to a calibration signal that is coupled to the current. The regulator circuit adjusts the output of the LED when the calibration signal is adjusted. In this manner, the LED may be calibrated to generate light at a desired brightness level and color level.

    摘要翻译: 一种装置包括LED和调节器电路。 调节器电路根据耦合到电流的校准信号控制提供给LED的电流。 当调节校准信号时,调节器电路调节LED的输出。 以这种方式,可以校准LED以产生所需亮度级和色彩级的光。

    Zone servo writing using self servo writing
    46.
    发明授权
    Zone servo writing using self servo writing 有权
    自动伺服写入区域伺服写入

    公开(公告)号:US08027117B1

    公开(公告)日:2011-09-27

    申请号:US12546164

    申请日:2009-08-24

    IPC分类号: G11B21/02 G11B5/09 G11B5/596

    摘要: A hard disk controller (HDC) of a hard disk drive (HDD) includes a read module, a clock generator module, and a write module. The read module reads servo spirals from a magnetic medium of the HDD via a read head of the HDD and generates read signals. The clock generator module generates a spiral clock having a first frequency based on the read signals and generates based on the spiral clock R write clocks having R frequencies, respectively, that are different than the first frequency, where R is an integer greater than 1. The write module writes via a write head of the HDD a first servo wedge on a first one of R zones of the magnetic medium using a first one of the R write clocks and a second servo wedge on a second one of the R zones using a second one of the R write clocks.

    摘要翻译: 硬盘驱动器(HDD)的硬盘控制器(HDC)包括读取模块,时钟发生器模块和写入模块。 读取模块通过HDD的读取头从HDD的磁介质读取伺服螺旋,并产生读取信号。 时钟发生器模块基于读取的信号产生具有第一频率的螺旋时钟,并且基于分别具有不同于第一频率的R频率的螺旋时钟R写入时钟产生R,其中R是大于1的整数。 写入模块使用第一个R写入时钟,通过硬盘的写头将第一个伺服楔形件写入到磁性介质的第一个R区域上,而第二个伺服楔块使用 第二个R写时钟。

    Threshold voltage digitizer for array of programmable threshold transistors
    47.
    发明授权
    Threshold voltage digitizer for array of programmable threshold transistors 有权
    用于可编程阈值晶体管阵列的阈值电压数字转换器

    公开(公告)号:US08014206B2

    公开(公告)日:2011-09-06

    申请号:US12883214

    申请日:2010-09-16

    申请人: Pantas Sutardja

    发明人: Pantas Sutardja

    IPC分类号: G11C16/04

    摘要: An integrated circuit including a voltage generator and a control module. The voltage generator is configured to generate a first voltage based on a plurality of codewords, and output the first voltage to a first word line communicating with a first set of transistors. Each of the first set of transistors has a plurality of programmable threshold voltages. The control module is configured to determine values of the threshold voltages of the first set of transistors based on (i) the codewords and (ii) currents sensed through the first set of transistors in response to the first voltage being output to the first word line. The control module is configured to adjust the values of the threshold voltages of the first set of transistors based on at least one of (i) locations of the first set of transistors on the first word line and (ii) a temperature of the integrated circuit.

    摘要翻译: 包括电压发生器和控制模块的集成电路。 电压发生器被配置为基于多个码字产生第一电压,并且将第一电压输出到与第一组晶体管通信的第一字线。 第一组晶体管中的每一个具有多个可编程阈值电压。 控制模块被配置为基于(i)码字来确定第一组晶体管的阈值电压的值,以及(ii)响应于第一电压被输出到第一字线的第一组晶体管感测的电流 。 控制模块被配置为基于(i)第一字线上的第一组晶体管的位置和(ii)集成电路的温度中的至少一个来调整第一组晶体管的阈值电压的值 。

    Read channel configuration based on polarity determined in accordance with multiple framings of signal samples
    48.
    发明授权
    Read channel configuration based on polarity determined in accordance with multiple framings of signal samples 有权
    根据信号样本的多个帧确定的极性读取通道配置

    公开(公告)号:US07990643B1

    公开(公告)日:2011-08-02

    申请号:US12795129

    申请日:2010-06-07

    IPC分类号: G11B27/36 G11B5/035

    CPC分类号: G11B5/59644 G11B20/14

    摘要: Systems and techniques to configure a read channel include, in at least one implementation, an apparatus including: detection circuitry configured to process an input signal from a machine-readable medium to calculate metrics; monitoring circuitry configured to determine a polarity of the input signal based on the metrics and at least one of multiple framings of signal samples of the input signal; and selection circuitry to configure a read channel for the machine-readable medium based on the determined polarity.

    摘要翻译: 用于配置读通道的系统和技术在至少一个实现中包括:设备,包括:检测电路,被配置为处理来自机器可读介质的输入信号以计算度量; 监视电路,被配置为基于所述度量和所述输入信号的信号样本的多个成帧中的至少一个来确定所述输入信号的极性; 以及选择电路,用于基于所确定的极性来配置机器可读介质的读通道。

    Method of producing capacitor structure in a semiconductor device
    49.
    发明授权
    Method of producing capacitor structure in a semiconductor device 有权
    在半导体器件中制造电容器结构的方法

    公开(公告)号:US07988744B1

    公开(公告)日:2011-08-02

    申请号:US12536237

    申请日:2009-08-05

    申请人: Pantas Sutardja

    发明人: Pantas Sutardja

    IPC分类号: H04R17/00 H01G9/00

    摘要: A method of producing capacitor structure includes, in at least one aspect, arranging first layer, adjacent first and second polarity conducting strips, the first layer conducting strips arranged as respective piecewise “S” shaped paths; arranging second layer, adjacent first and second polarity conducting strips, the second layer conducting strips arranged as respective piecewise “S” shaped paths, the second layer second polarity conducting strip is arranged overlying and electrically separated from the first layer first polarity conducting strip, and the second layer first polarity conducting strip is arranged overlying and electrically separated from the first layer second polarity conducting strip; electrically connecting the first layer first polarity conducting strip with the second layer first polarity conducting strip; and electrically connecting the first layer second polarity conducting strip with the second layer second polarity conducting strip.

    摘要翻译: 制造电容器结构的方法在至少一个方面包括:布置第一层,相邻的第一和第二极性导电条,布置成分段“S”形路径的第一层导电条; 布置第二层,相邻的第一和第二极性导电条,布置成相应的分段“S”形路径的第二层导电条,第二层第二极性导电条被布置成与第一层第一极性导电条层叠并电隔离,以及 所述第二层第一极性导电条被布置成与所述第一层第二极性导电条层叠并电隔离; 将第一层第一极性导电条与第二层第一极性导电条电连接; 以及将所述第一层第二极性导电条与所述第二层第二极性导电条电连接。

    Preamp circuit including a loopback mode for data storage devices
    50.
    发明授权
    Preamp circuit including a loopback mode for data storage devices 有权
    包括用于数据存储设备的环回模式的前置放大电路

    公开(公告)号:US07852585B1

    公开(公告)日:2010-12-14

    申请号:US12341021

    申请日:2008-12-22

    申请人: Pantas Sutardja

    发明人: Pantas Sutardja

    IPC分类号: G11B5/09

    CPC分类号: G11B5/09

    摘要: A method for testing operation of a preamplifier circuit includes generating a first symbol, converting the first symbol into a write signal, transmitting the write signal to a write signal input of the preamplifier circuit, and looping the write signal back to a read signal output of the preamplifier circuit.

    摘要翻译: 一种用于测试前置放大器电路的操作的方法包括:产生第一符号,将第一符号转换成写入信号,将写入信号传输到前置放大器电路的写入信号输入端,并将写入信号循环回到 前置放大器电路。