公开(公告)号：US07352691B2

公开(公告)日：2008-04-01

申请号：US11010087

申请日：2004-12-10

申请人： Mark D. Hagen ,  Mark D. Heminger

发明人： Mark D. Hagen ,  Mark D. Heminger

IPC分类号： H04J11/00 ,  H04J3/24 ,  H04L27/28 ,  H04B1/04

CPC分类号： H04L27/261

摘要： A method that allows a digital communications system to detect the presence of transmitted messages in noisy environments. The system includes an OFDM transmitter and an OFDM receiver. The OFDM transmitter converts a digital signal to be transmitted to a plurality of sub-signals, each corresponding to a respective sub-carrier frequency. The signal is a packet including a preamble field having a known data pattern. The transmitter pre-codes the preamble data pattern, maps the data to corresponding phase information, converts the sub-signals to the time domain, and converts the sub-signals to analog form for subsequent transmission. The OFDM receiver receives the transmitted sub-signals, converts the sub-signals to digital form, converts the sub-signals to the frequency domain, and subjects the sub-signals to preamble detection processing to detect the signals' presence. By pre-coding the preamble data pattern and defining the received sub-signals in terms of the phase difference between adjacent sub-carriers, the detection of the transmitted messages can be performed in a manner that is insensitive to phase offset.

摘要翻译： 一种允许数字通信系统在嘈杂环境中检测发送的消息的存在的方法。 该系统包括OFDM发射机和OFDM接收机。 OFDM发送器将要发送的数字信号转换成多个子信号，每个子信号对应于相应的子载波频率。 信号是包括具有已知数据模式的前同步码字段的分组。 发射机预编码前导码数据模式，将数据映射到对应的相位信息，将子信号转换为时域，并将子信号转换为模拟形式用于随后的传输。 OFDM接收机接收发送的子信号，将子信号转换为数字形式，将子信号转换为频域，并对子信号进行前导码检测处理，以检测信号的存在。 通过对前导码数据模式进行预编码并根据相邻子载波之间的相位差定义接收的子信号，可以以对相位偏移不敏感的方式来执行所发送的消息的检测。

公开(公告)号：US07215888B2

公开(公告)日：2007-05-08

申请号：US10103401

申请日：2002-03-21

申请人： Eric G. Oettinger ,  Mark D. Heminger ,  Mark D. Hagen

发明人： Eric G. Oettinger ,  Mark D. Heminger ,  Mark D. Hagen

IPC分类号： H04B10/00

CPC分类号： H04B10/1141

摘要： A system and method of varying the control loop gain of an optical wireless communication link between a transmitting station and a receiving station as an inverse function of distance between the transmitting station and the receiving station to allow the optical wireless communication link to be used reliably over a wide range of distances.

摘要翻译： 将发送站和接收站之间的光无线通信链路的控制环路增益改变为发送站与接收站之间的距离的反向函数以允许光无线通信链路可靠地使用的系统和方法 距离范围很广。

公开(公告)号：US06714338B2

公开(公告)日：2004-03-30

申请号：US10146758

申请日：2002-05-16

申请人： Eric G. Oettinger ,  Mark D. Heminger ,  Mark D. Hagen

发明人： Eric G. Oettinger ,  Mark D. Heminger ,  Mark D. Hagen

IPC分类号： G02B2600

CPC分类号： G02B26/0833

摘要： A technique that reduces or eliminates the non-linearities associated with the internal feedback sensor used in a micro-electro-mechanical mirror assembly. Using the relatively linear response of the mirror positioning motor, associated driver electronics, and the mirror itself, a calibration is performed that compensates for the internal feedback sensor non-linearity. An expected position can then be calculated simply by multiplying the gain of the system by the output, due to the good inherent linearity in the system. The calibration will compare measured versus expected position criteria for a predefined set of constant outputs. The data will form a look-up table that will be used to correct for the sensor non-linearities.

摘要翻译： 减少或消除与微机电反射镜组件中使用的内部反馈传感器相关联的非线性的技术。 使用反射镜定位电动机，相关联的驱动器电子装置和镜子本身的相对线性的响应，执行补偿内部反馈传感器非线性的校准。 由于系统内部线性良好，所以可以简单地通过将系统的增益乘以输出来计算预期位置。 校准将比较预定义的一组常数输出的测量与预期位置标准。 数据将形成一个查找表，用于校正传感器的非线性。

公开(公告)号：US08760081B2

公开(公告)日：2014-06-24

申请号：US11552697

申请日：2006-10-25

申请人： Mark D. Hagen ,  Eric G. Oettinger

发明人： Mark D. Hagen ,  Eric G. Oettinger

IPC分类号： H05B37/02

CPC分类号： H05B41/2828 ,  H05B41/2824 ,  H05B41/382

摘要： Various systems and methods for LCD backlight control are disclosed herein. For example, some embodiments of the present invention provide an LCD backlight circuit with an analog inverter circuit that provides a drive voltage to a lamp. A current traversing the lamp is sensed and provided to a digital control circuit. Based on the sensed current, the digital control circuit generates a control signal that is fed back to the analog inverter circuit. In some cases, the digital control circuit is used to cause a gradual increase in voltage applied to the lamp to achieve ignition of the lamp. In other cases, the digital control is used to provide a pre-distorted sine wave that attenuates one or more harmonics introduced into the system by the non-linearities of the lamp.

摘要翻译： 本文公开了用于LCD背光控制的各种系统和方法。 例如，本发明的一些实施例提供了具有向灯提供驱动电压的模拟反相器电路的LCD背光电路。 检测到穿过灯的电流并将其提供给数字控制电路。 基于感测电流，数字控制电路产生反馈到模拟反相器电路的控制信号。 在一些情况下，数字控制电路用于使灯施加的电压逐渐增加以实现灯的点燃。 在其他情况下，数字控制用于提供预失真的正弦波，其通过灯的非线性衰减引入到系统中的一个或多个谐波。

公开(公告)号：US5241433A

公开(公告)日：1993-08-31

申请号：US965038

申请日：1992-10-22

申请人： Todd B. Anderson ,  Mark E. Bofferding ,  Martin R. Green ,  Mark D. Hagen ,  Joseph M. Humel ,  William J. Hunt ,  Lawrence P. Segar ,  John J. Stephenson ,  Michael C. Stich

发明人： Todd B. Anderson ,  Mark E. Bofferding ,  Martin R. Green ,  Mark D. Hagen ,  Joseph M. Humel ,  William J. Hunt ,  Lawrence P. Segar ,  John J. Stephenson ,  Michael C. Stich

IPC分类号： G11B5/596

CPC分类号： G11B5/59655

摘要： In a disk storage device dedicated servo system, a reference track is written in the outer guardband of the servo surface and each of the data surfaces. Supplemental position error signal (PES) values are obtained from the difference of servo and data surface samples at a plurality of locations around the disk and stored for access during read/write operations. The supplemental PES values are combined with the dedicated surface PES values to yield a composite PES that more accurately follows the data track centerline of the disk surface being addressed. The supplemental PES values are also periodically updated. To provide a more accurate correction of the composite PES, two consecutive supplemental values are used and an interpolation is calculated to provide a continuously changing supplemental PES value for modification of each sector actuator drive pulse between the two current supplemental PES values. Provision is also made in the apparatus to make the correction technique tolerant of tangential skew that may make tracks unreadable because of early or late timing through the provision of sequences of alternative early and later sample sector sequences.

摘要翻译： 在盘存储装置专用伺服系统中，将参考轨迹写入伺服表面的外保护带和每个数据表面。 补充位置误差信号（PES）值是从磁盘周围的多个位置处的伺服和数据表面采样的差异获得的，并且在读/写操作期间被存储用于存取。 补充的PES值与专用表面PES值组合以产生更精确地跟随被寻址的盘表面的数据轨道中心线的复合PES。 补充的PES值也被定期更新。 为了提供复合PES的更准确的校正，使用两个连续的补充值，并且计算插值以提供连续改变的补充PES值，以修改两个当前补充PES值之间的每个扇区致动器驱动脉冲。 在装置中也作出规定，以使得校正技术能够容忍切向偏斜，由于提供替代的早期和后期采样扇区序列的序列，可能导致轨迹不可读，因为它们的早期或晚期定时。

公开(公告)号：US4542377A

公开(公告)日：1985-09-17

申请号：US453019

申请日：1982-12-27

申请人： Mark D. Hagen ,  Peter J. Mendel ,  John L. Regehr

发明人： Mark D. Hagen ,  Peter J. Mendel ,  John L. Regehr

IPC分类号： G09F9/00 ,  G06F1/16 ,  G06F17/21 ,  G09G1/02 ,  G09G5/00 ,  G09G5/22 ,  G09G5/32 ,  G09G5/34 ,  G09G1/00

CPC分类号： G06F1/16 ,  G09G1/02 ,  G09G5/227 ,  G09G5/343 ,  G06F2200/1611 ,  G09G2340/0492

摘要： A CRT display having a rotatable display face for presenting data in a vertical and horizontal orientation is disclosed. The reorientation of the CRT face causes activation of the switches that control the electronic logic to reorient the data and present the data properly on the face of the CRT.

摘要翻译： 公开了一种具有用于以垂直和水平方向呈现数据的可旋转显示面的CRT显示器。 CRT面的重新定向会导致开关的激活，控制电子逻辑重定向数据，并将数据正确地呈现在CRT的表面上。

公开(公告)号：US07126776B1

公开(公告)日：2006-10-24

申请号：US10125131

申请日：2002-04-17

申请人： Robert W. Warren, Jr. ,  Mark D. Hagen

发明人： Robert W. Warren, Jr. ,  Mark D. Hagen

IPC分类号： G11B5/09

CPC分类号： G11B19/28 ,  G11B5/5526 ,  G11B5/596

摘要： The present invention compensates for variations in the angular velocity of the drive's spindle motor by periodically dropping clocks to a counter based upon the previous servo wedge-to-wedge timing. This enables a substantially constant count to be maintained between servo wedges and allows a more predictable generation of the data sector pulses. A more predictable generation of the data sector pulses enables the size of the guard band preceding each data sector to be decreased and the capacity of the disk to be correspondingly increased.

摘要翻译： 本发明通过基于先前的伺服楔形到楔形时间周期性地将时钟丢弃到计数器来补偿驱动器的主轴电动机的角速度的变化。 这使得能够在伺服楔之间保持基本恒定的计数，并允许数据扇区脉冲的更可预测的产生。 数据扇区脉冲的更可预测的生成使得能够减少每个数据扇区之前的保护频带的大小并且相应地增加磁盘的容量。

公开(公告)号：US06956350B2

公开(公告)日：2005-10-18

申请号：US10930335

申请日：2004-08-30

申请人： Mark D. Hagen

发明人： Mark D. Hagen

IPC分类号： G02B26/08 ,  G05B11/28

CPC分类号： G02B26/0841

摘要： A resonant scanning mirror driver configured to drive a micro-electro-mechanical system (MEMS) mirror to a desired deflection utilizes a PWM pattern selected from patterns having 32, 40, 48, 56 or 64 bits. The patterns reflect the first positive and negative quarters of the PWM pattern and the remaining quarters are generated utilizing the symmetry of the sine wave that is generated.

摘要翻译： 配置成将微机电系统（MEMS）反射镜驱动到期望偏转的谐振扫描镜驱动器利用从具有32,40,48,56或64位的图案中选择的PWM图案。 这些图案反映了PWM图案的第一正和负四分之一，剩余的四分之一是利用所产生的正弦波的对称性产生的。

公开(公告)号：US06369969B1

公开(公告)日：2002-04-09

申请号：US09797446

申请日：2001-02-28

申请人： Grant S. Christiansen ,  Mark D. Hagen

发明人： Grant S. Christiansen ,  Mark D. Hagen

IPC分类号： G11B509

CPC分类号： G11B5/012 ,  G11B5/59683 ,  G11B2005/0008 ,  G11B2005/0018

摘要： A disk drive is disclosed comprising a bias layer in a magnetoresistive (MR) head actuated over a disk having a plurality of data tracks, each data track comprising a plurality of sectors. A sync mark detector detects a sync mark pattern in a sector, wherein when the sync mark pattern is detected a sync mark detect signal and a polarity signal are generated. The polarity signal indicates when the polarity of the bias layer has deviated from a preferred polarity, wherein the polarity of the bias layer is realigned back toward the preferred polarity.

摘要翻译： 公开了一种磁盘驱动器，其包括在具有多个数据磁道的盘上致动的磁阻（MR）磁头中的偏置层，每个数据磁道包括多个扇区。 同步标记检测器检测扇区中的同步标记图案，其中当检测到同步标记图案时，产生同步标记检测信号和极性信号。 极性信号指示偏置层的极性何时偏离优选的极性，其中偏置层的极性朝着优选的极性重新排列。

公开(公告)号：US06812669B2

公开(公告)日：2004-11-02

申请号：US10172579

申请日：2002-06-14

申请人： Mark D. Hagen

发明人： Mark D. Hagen

IPC分类号： G05B1128

CPC分类号： G02B26/0841

摘要： A micro-electro-mechanical system (MEMS) resonant scanning mirror driver circuit has separate amplitude and waveshape inputs which allows a relatively slow and therefore inexpensive DAC to be used to control the amplitude of the drive signal for the MEMS device.

摘要翻译： 微机电系统（MEMS）谐振扫描镜驱动器电路具有分离的幅度和波形输入，其允许使用相对较慢且因此便宜的DAC来控制用于MEMS器件的驱动信号的幅度。