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1. 发明授权

US5566034A Off-track detection with charge redistribution A/D circuits 失效
标题翻译：带电荷再分配A / D电路的非轨道检测
公开(公告)号：US5566034A
公开(公告)日：1996-10-15
申请号：US253463
申请日：1994-06-03
申请人： Wayne G. Shumaker
发明人： Wayne G. Shumaker
IPC分类号： G11B5/55 , G11B5/596
CPC分类号： G11B5/5547
摘要： An apparatus for detecting off-track positioning of a disk read/write head seeking a selected data track on a disk having data tracks with embedded servo burst patterns recorded thereon. The apparatus comprises a compare and select component, a charge redistribution A/D converter circuit and an off-track controller. The compare and select component compares and selects from among voltage values corresponding to the servo bursts a pair best representing track centerline as a first servo signal and a second servo signal and determines which of the servo signals is greater. The charge redistribution analog-to-digital (A/D) converter circuit determines if the normalized track position exceeds a position threshold representing a percentage of the normalized track position distinguishing on-track from off-track position through the use of an internal binary-weighted, switched capacitor array DAC and a comparator. The DAC receives as inputs the first servo signal and the second servo signal and has an array of binary-weighted, switched capacitors, which is configured according to a position threshold-related value. The binary value of the position threshold is supplied by the off-track controller. Based on the output of the DAC, the comparator determines whether or not an off-track condition has occurred. Once an off-track condition has been detected, the off-track controller generates an off-track position error signal in response to the comparator output when indicative of an off-track condition.
摘要翻译：一种用于检测在具有记录在其上的嵌入的伺服突发图案的具有数据轨道的磁盘上寻找所选数据磁道的磁盘读/写磁头的偏离定位的装置。该装置包括比较和选择部件，电荷再分配A / D转换器电路和偏离轨道控制器。比较选择部件从对应于伺服脉冲串的电压值中比较并选择表示作为第一伺服信号的轨道中心线的对，并且确定伺服信号中的哪一个更大。电荷再分配模数（A / D）转换器电路确定归一化轨迹位置是否超过表示通过使用内部二进制编码方式区分轨道上轨道与非轨道位置的归一化轨道位置的百分比的位置阈值，加权，开关电容阵列DAC和比较器。 DAC接收第一伺服信号和第二伺服信号作为输入，并且具有根据位置阈值相关值配置的二进制加权切换电容器阵列。位置阈值的二进制值由偏离轨道控制器提供。基于DAC的输出，比较器确定是否发生偏离磁道状况。一旦检测到偏离磁道状况，当指示偏离磁道状况时，偏离磁道控制器响应于比较器输出产生偏离磁道位置误差信号。

2. 发明申请

US20090094466A1 PROCESS FIELD DEVICE WITH AUGMENTED LOOP POWER AND WIRELESS COMMUNICATION 审中-公开
标题翻译：具有增益环路功率和无线通信的过程现场设备
公开(公告)号：US20090094466A1
公开(公告)日：2009-04-09
申请号：US12059447
申请日：2008-03-31
申请人： Kerry R. Matthew , Wayne G. Shumaker , Patrick J. Moran
发明人： Kerry R. Matthew , Wayne G. Shumaker , Patrick J. Moran
IPC分类号： G06F1/26
CPC分类号： H02J7/34 , H02J1/10 , H02J17/00 , H02J50/00 , H02J50/10 , H02J50/80
摘要： A system for controlling and measuring a power source switches between a first source and a second source in rapid succession to help maintain function of a load. In particular, a primary source may be replaced or augmented by an auxiliary source. Fast switching is achieved by delivering current to the output load through a nonlinear device. A record of conditions when the power sources switch modes is maintained in memory. The record is used to anticipate subsequent mode switching events.
摘要翻译：用于控制和测量电源的系统以快速连续的方式在第一源和第二源之间切换以帮助保持负载的功能。特别地，主要来源可以由辅助源替换或增加。通过非线性器件将电流传递到输出负载来实现快速切换。电源切换模式的条件记录保存在存储器中。该记录用于预测随后的模式切换事件。

3. 发明授权

US4600904A Broken loop switched capacitor high pass filter 失效
标题翻译：断路开关电容器高通滤波器
公开(公告)号：US4600904A
公开(公告)日：1986-07-15
申请号：US625422
申请日：1984-06-28
申请人： Wayne G. Shumaker
发明人： Wayne G. Shumaker
IPC分类号： H03H19/00 , H03H11/12
CPC分类号： H03H19/004
摘要： A switched-capacitor high pass filter is disclosed and in which a switched capacitor approximation of an inductor is inserted in the direct coefficient loop to prevent instability. The value of the inductor is selected to compensate for the filter termination phase error.
摘要翻译：公开了一种开关电容器高通滤波器，其中电感器的开关电容器近似被插入到直接系数环路中以防止不稳定性。选择电感的值来补偿滤波器终止相位误差。

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