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1. 发明授权

US08872573B2 Gain control with multiple integrators 有权
标题翻译：增益控制与多个积分器
公开(公告)号：US08872573B2
公开(公告)日：2014-10-28
申请号：US13342881
申请日：2012-01-03
申请人： Jacob Lee Dahle , Robert Allen Hutchins , Sedat Oelcer , Larry LeeRoy Tretter
发明人： Jacob Lee Dahle , Robert Allen Hutchins , Sedat Oelcer , Larry LeeRoy Tretter
IPC分类号： H03K5/00 , H04B1/06 , G11B20/10 , G11B5/09
CPC分类号： G11B20/10009 , G11B5/09 , G11B20/10027 , G11B20/10037 , G11B20/10046 , G11B20/10055 , G11B20/10074 , G11B20/10175 , G11B20/10212 , G11B20/10425 , G11B2220/90
摘要： A method according to one embodiment includes receiving an increment signal at a first integrator when a second integrator overflows; receiving a decrement signal at the first integrator when the second integrator underflows; and incrementing or decrementing a gain applied to an analog signal based on receipt of the increment or decrement signal. A system according to one embodiment includes a first integrator configured to cause incrementing of a gain applied to an analog signal based on receipt of an increment signal when a second integrator overflows, the first integrator being configured to cause decrementing of the gain applied to the analog signal based on receipt of a decrement signal when the second integrator underflows; and the second integrator.
摘要翻译：根据一个实施例的方法包括当第二积分器溢出时在第一积分器处接收增量信号; 当第二积分器下溢时，在第一积分器处接收递减信号; 以及基于所述增量或减量信号的接收递增或递减施加到模拟信号的增益。根据一个实施例的系统包括第一积分器，其被配置为当第二积分器溢出时，基于接收到增量信号来增加施加到模拟信号的增益，所述第一积分器被配置为引起施加到模拟信号的增益的递减当第二积分器下溢时基于接收到递减信号的信号; 和第二个积分器。

2. 发明授权

US08213120B2 Flexible cable comprising liquid crystal polymer 失效
标题翻译：柔性电缆包含液晶聚合物
公开(公告)号：US08213120B2
公开(公告)日：2012-07-03
申请号：US11852667
申请日：2007-09-10
申请人： Sassan K. Shahidi , Larry LeeRoy Tretter , George G. Zamora
发明人： Sassan K. Shahidi , Larry LeeRoy Tretter , George G. Zamora
IPC分类号： G11B23/02 , G11B33/04
CPC分类号： H05K1/0313 , G11B5/00813 , H05K1/0393 , H05K2201/0141
摘要： A tape drive system according to one general embodiment includes a magnetic head; a drive mechanism for passing a magnetic recording tape over the head; a cable coupled to the magnetic head, the cable comprising a first layer of liquid crystal polymer, and at least 16 electrically conductive leads operatively coupled to the first layer of liquid crystal polymer; and a controller coupled to the cable, and communicating with the head using the cable. A cable according to another general embodiment includes a first layer of liquid crystal polymer; and at least 16 electrically conductive leads operatively coupled to the first layer of liquid crystal polymer.
摘要翻译：根据一般实施例的磁带驱动系统包括磁头; 用于将磁记录带通过头部的驱动机构; 耦合到所述磁头的电缆，所述电缆包括第一层液晶聚合物，以及至少16个导电引线，可操作地耦合到所述第一液晶聚合物层; 以及耦合到电缆的控制器，并且使用电缆与头部通信。根据另一个一般实施例的电缆包括第一层液晶聚合物; 以及可操作地耦合到第一液晶聚合物层的至少16个导电引线。

3. 发明授权

US08107181B2 Apparatus, system, and method for measuring magnetoresistive head resistance 失效
标题翻译：用于测量磁阻头电阻的装置，系统和方法
公开(公告)号：US08107181B2
公开(公告)日：2012-01-31
申请号：US11554580
申请日：2006-10-30
申请人： Larry LeeRoy Tretter
发明人： Larry LeeRoy Tretter
IPC分类号： G11B5/03 , G11B5/02
CPC分类号： G11B5/3903 , G11B2005/0018
摘要： An apparatus, system, and method are disclosed for measuring magnetoresistive head assembly resistance. A measurement module measures a reference voltage across a reference resistance while applying a reference current to the reference resistance. In addition, the measurement module measures a test voltage across a first biasing resistor, a MR head assembly, and a second biasing resistor connected in series while applying the reference current to the first biasing resistor, the MR head assembly, and the second biasing resistor. A computation module calculates the MR head assembly resistance from the reference voltage, the test voltage, the reference resistance, and the resistances of the first and second biasing resistors.
摘要翻译：公开了用于测量磁阻头组件电阻的装置，系统和方法。测量模块在参考电阻施加参考电流时测量参考电阻两端的参考电压。此外，测量模块测量跨第一偏置电阻器，MR头组件和串联连接的第二偏置电阻器的测试电压，同时将参考电流施加到第一偏置电阻器，MR头组件和第二偏置电阻器。计算模块根据参考电压，测试电压，参考电阻和第一和第二偏置电阻器的电阻计算MR磁头组装电阻。

4. 发明申请

US20080186634A1 APPARATUS, SYSTEM, AND METHOD FOR DETECTING THE FORMATION OF A SHORT BETWEEN A MAGNETORESISTIVE HEAD AND A HEAD SUBSTRATE 失效
标题翻译：用于检测磁头和头基板之间短路形成的装置，系统和方法
公开(公告)号：US20080186634A1
公开(公告)日：2008-08-07
申请号：US11670406
申请日：2007-02-01
申请人： Brian Axtman , Robert Glenn Biskeborn , Stanley W. Czarnecki , Larry LeeRoy Tretter
发明人： Brian Axtman , Robert Glenn Biskeborn , Stanley W. Czarnecki , Larry LeeRoy Tretter
IPC分类号： G11B5/33
CPC分类号： G11B5/40 , G11B5/3906 , G11B5/41
摘要： An apparatus, system, and method are disclosed for detecting the formation of a short between a magnetoresistive (“MR”) head and a head substrate. The apparatus is presented with a logic unit containing a plurality of modules configured to functionally execute the necessary steps of generating a baseline electric potential level between a head substrate and ground, monitoring the level of the electric potential between the head substrate and ground, and detecting the formation of a short circuit between the MR head and the head substrate by detecting a change in the electric potential level monitored by the monitoring module from the baseline level to a predetermined threshold level. Beneficially, such an apparatus, system, and method would reduce read errors on the magnetic tape storage system, the time and resources required to recover from such errors, and allow for preventative measures to obviate contamination short related failures of tape drive systems.
摘要翻译：公开了一种用于检测在磁阻（“MR”）头和头基板之间形成短路的装置，系统和方法。该装置具有包含多个模块的逻辑单元，所述多个模块被配置为功能地执行在头基板和地之间生成基线电位电平的必要步骤，监测头基板和地之间的电位的水平，以及检测通过检测由监视模块监控的电位电平从基准电平到预定阈值电平，在MR头和头基板之间形成短路。有利地，这样的装置，系统和方法将减少磁带存储系统上的读取错误，从这种错误中恢复所需的时间和资源，并且允许预防措施消除带驱动系统的短期相关故障。

5. 发明授权

US07075344B2 Measurement of the write current of a current mode write driver while engaged in the writing process 有权
标题翻译：在写入过程中测量当前模式写入驱动器的写入电流
公开(公告)号：US07075344B2
公开(公告)日：2006-07-11
申请号：US10307607
申请日：2002-12-02
申请人： Larry LeeRoy Tretter
发明人： Larry LeeRoy Tretter
IPC分类号： H03K3/00
CPC分类号： G11B5/02 , G11B2005/0013
摘要： A system and method for measuring in real-time the current of a current mode driver circuit for writing data through a write head in tape or disk drive storage devices, the current mode driver circuit including one or more current mirror circuits for providing a current output in proportion to current through the write head during a write operation, the system comprising: device for converting the current mirror circuit current output into a first voltage; device for generating a second voltage representing a reference current; and, a device for comparing the first voltage value to the second voltage and generating an output signal indicating a ratio of the first and second voltages, the ratio being a measure of the current output of the current mirror circuit.
摘要翻译：一种用于实时测量电流模式驱动电路的电流的系统和方法，用于通过磁带或磁盘驱动器存储装置中的写头写入数据，该电流模式驱动电路包括一个或多个电流镜电路，用于提供电流输出在写入操作期间与通过写入头的电流成比例，该系统包括：用于将电流镜像电路电流输出转换为第一电压的装置; 用于产生表示参考电流的第二电压的装置; 以及用于将所述第一电压值与所述第二电压进行比较并产生指示所述第一和第二电压的比率的输出信号的装置，所述比率是所述电流镜电路的电流输出的量度。

6. 发明申请

US20120126876A1 GAIN CONTROL WITH MULTIPLE INTEGRATORS 有权
标题翻译：增益控制与多个积分器
公开(公告)号：US20120126876A1
公开(公告)日：2012-05-24
申请号：US13342881
申请日：2012-01-03
申请人： Jacob Lee Dahle , Robert Allen Hutchins , Sedat Oelcer , Larry LeeRoy Tretter
发明人： Jacob Lee Dahle , Robert Allen Hutchins , Sedat Oelcer , Larry LeeRoy Tretter
IPC分类号： G06G7/18
CPC分类号： G11B20/10009 , G11B5/09 , G11B20/10027 , G11B20/10037 , G11B20/10046 , G11B20/10055 , G11B20/10074 , G11B20/10175 , G11B20/10212 , G11B20/10425 , G11B2220/90
摘要： A method according to one embodiment includes receiving an increment signal at a first integrator when a second integrator overflows; receiving a decrement signal at the first integrator when the second integrator underflows; and incrementing or decrementing a gain applied to an analog signal based on receipt of the increment or decrement signal. A system according to one embodiment includes a first integrator configured to cause incrementing of a gain applied to an analog signal based on receipt of an increment signal when a second integrator overflows, the first integrator being configured to cause decrementing of the gain applied to the analog signal based on receipt of a decrement signal when the second integrator underflows; and the second integrator.
摘要翻译：根据一个实施例的方法包括当第二积分器溢出时在第一积分器处接收增量信号; 当第二积分器下溢时，在第一积分器处接收递减信号; 以及基于所述增量或减量信号的接收递增或递减施加到模拟信号的增益。根据一个实施例的系统包括第一积分器，其被配置为当第二积分器溢出时，基于接收到增量信号来增加施加到模拟信号的增益，所述第一积分器被配置为引起施加到模拟信号的增益的递减当第二积分器下溢时基于接收到递减信号的信号; 和第二个积分器。

7. 发明授权

US07924524B2 System and method for generating an amplitude error signal in a magnetic tape recording channel 有权
标题翻译：用于在磁带记录通道中产生振幅误差信号的系统和方法
公开(公告)号：US07924524B2
公开(公告)日：2011-04-12
申请号：US12351432
申请日：2009-01-09
申请人： Jacob Lee Dahle , Robert Allen Hutchins , Sedat Oelcer , Larry LeeRoy Tretter
发明人： Jacob Lee Dahle , Robert Allen Hutchins , Sedat Oelcer , Larry LeeRoy Tretter
IPC分类号： G11B5/035
CPC分类号： G11B5/035 , G11B20/10009 , G11B20/10027 , G11B2220/90 , H04L25/03248
摘要： A method according to one embodiment includes generating a first gain error, comprising: receiving an output of an equalizer; and comparing a magnitude of the output to a saturation threshold level; if the output is higher than the saturation threshold level, generating a first gain error. The method further including generating at least one of a second and a third gain error, wherein generating the second gain error comprises: using either a slicer or a trellis for generating the second gain error, wherein the slicer generates a gain error based on an output of an interpolator, wherein the trellis generates a gain error based on an output of a maximum likelihood detector; wherein generating the third gain error comprises: receiving an output of an equalizer; generating a threshold qualified peak from the equalizer output and a tracking threshold level; comparing the threshold qualified peak to a second threshold; and generating a third gain error based on the comparison.
摘要翻译：根据一个实施例的方法包括产生第一增益误差，包括：接收均衡器的输出; 以及将所述输出的幅度与饱和阈值电平进行比较; 如果输出高于饱和阈值电平，则产生第一增益误差。该方法还包括产生第二和第三增益误差中的至少一个，其中产生第二增益误差包括：使用限幅器或网格来产生第二增益误差，其中限幅器基于输出产生增益误差其中所述网格基于最大似然检测器的输出产生增益误差; 其中产生所述第三增益误差包括：接收均衡器的输出; 从均衡器输出产生阈值合格峰值和跟踪阈值电平; 将阈值合格峰值与第二阈值进行比较; 以及基于所述比较产生第三增益误差。

8. 发明申请

US20080100948A1 APPARATUS, SYSTEM, AND METHOD FOR MEASURING MAGNETORESISTIVE HEAD RESISTANCE 失效
标题翻译：用于测量磁阻电阻的装置，系统和方法
公开(公告)号：US20080100948A1
公开(公告)日：2008-05-01
申请号：US11554580
申请日：2006-10-30
申请人： Larry LeeRoy Tretter
发明人： Larry LeeRoy Tretter
IPC分类号： G11B5/03 , G11B27/36 , G11B5/09 , G11B5/02
CPC分类号： G11B5/3903 , G11B2005/0018
摘要： An apparatus, system, and method are disclosed for measuring magnetoresistive head assembly resistance. A measurement module measures a reference voltage across a reference resistance while applying a reference current to the reference resistance. In addition, the measurement module measures a test voltage across a first biasing resistor, a MR head assembly, and a second biasing resistor connected in series while applying the reference current to the first biasing resistor, the MR head assembly, and the second biasing resistor. A computation module calculates the MR head assembly resistance from the reference voltage, the test voltage, the reference resistance, and the resistances of the first and second biasing resistors.
摘要翻译：公开了用于测量磁阻头组件电阻的装置，系统和方法。测量模块在参考电阻施加参考电流时测量参考电阻两端的参考电压。此外，测量模块测量跨第一偏置电阻器，MR头组件和串联连接的第二偏置电阻器的测试电压，同时将参考电流施加到第一偏置电阻器，MR头组件和第二偏置电阻器。计算模块根据参考电压，测试电压，参考电阻和第一和第二偏置电阻器的电阻计算MR磁头组装电阻。

9. 发明授权

US07039540B1 Apparatus, system, and method for testing an analog to digital converter 失效
标题翻译：用于测试模数转换器的装置，系统和方法
公开(公告)号：US07039540B1
公开(公告)日：2006-05-02
申请号：US10966596
申请日：2004-10-15
申请人： Jacob Lee Dahle , Larry LeeRoy Tretter
发明人： Jacob Lee Dahle , Larry LeeRoy Tretter
IPC分类号： G06F19/00 , H03M1/10
CPC分类号： H03M1/1071
摘要： An apparatus, system, and method are disclosed for testing an analog to digital converter with a known analog signal applied. A first register module stores a first digitized instance of an analog signal. A second register module stores a second digitized instance of the analog signal. A difference module calculates the absolute difference between the first and second digitized instances. A bad code module identifies an erroneous digitized instance wherein the absolute difference is greater than a limit value. In one embodiment, a counter module counts the erroneous digitized instance. A test system may identify a failed analog to digital converter if the erroneous digitized instance count is greater than a specified target value.
摘要翻译：公开了一种用于利用已知模拟信号来测试模数转换器的装置，系统和方法。第一寄存器模块存储模拟信号的第一数字化实例。第二寄存器模块存储模拟信号的第二数字化实例。差分模块计算第一和第二数字化实例之间的绝对差。错误代码模块识别错误的数字化实例，其中绝对差大于限制值。在一个实施例中，计数器模块对错误的数字化实例进行计数。如果错误的数字化实例计数大于指定的目标值，则测试系统可以识别失败的模数转换器。

10. 发明授权

US06320713B1 Ratio method for measurement of MR read head resistance 失效
标题翻译： MR读头电阻的测量比率方法
公开(公告)号：US06320713B1
公开(公告)日：2001-11-20
申请号：US09395147
申请日：1999-09-14
申请人： Larry LeeRoy Tretter , James Ernest Malmberg
发明人： Larry LeeRoy Tretter , James Ernest Malmberg
IPC分类号： G11B503
CPC分类号： G11B5/035 , G01R27/14 , G11B5/00813 , G11B5/012 , G11B5/40 , G11B5/455 , G11B33/10 , G11B2005/0016
摘要： A reference current and resistance is used to determine a reference voltage. A variable current is then applied to the MR read head, and is adjusted to produce a voltage equal to that of the reference voltage. Then, the known current and voltage is used to determine the resistance of the MR read head.
摘要翻译：参考电流和电阻用于确定参考电压。然后将可变电流施加到MR读取头，并被调整以产生等于参考电压的电压。然后，使用已知的电流和电压来确定MR读取头的电阻。

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