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1. 发明授权

US5323278A Low noise amplifier circuit for magnetoresistive sensors for fast read-write switching in low supply voltage applications 失效
标题翻译：用于低电压应用中快速读写开关的磁阻传感器的低噪声放大器电路
公开(公告)号：US5323278A
公开(公告)日：1994-06-21
申请号：US946208
申请日：1992-09-17
申请人： John T. Contreras , Stephen A. Jove , Klaas B. Klaassen , Jacobus C. Leonardus van Peppen
发明人： John T. Contreras , Stephen A. Jove , Klaas B. Klaassen , Jacobus C. Leonardus van Peppen
IPC分类号： G01R33/09 , G11B5/00 , G11B5/02 , G11B33/12 , G11B5/127 , G11B5/33
CPC分类号： G11B33/122 , G01R33/09 , G11B5/00 , G11B5/02 , G11B2005/0016 , G11B2005/0018
摘要： A data storage system comprises magnetoresistive (MR) sensing elements for sensing data from a recording medium that is referenced to ground, and an amplifier circuit including a biasing stage, an amplifying stage, and a matching stage, each referenced to a common supply voltage source and to ground. The biasing stage includes a reference current source for selectively biasing each MR element with a constant current and, in so doing, developing a single-ended voltage signal having a first dc component. The amplifying stage converts the single-ended voltage signal into an amplified single-ended output voltage signal having a second dc component but in which the first dc component is eliminated. The matching stage creates a bias and imposes said bias on the amplifying stage for converting the single-ended output voltage signal to a differential output voltage signal in which the second dc component is eliminated.
摘要翻译：数据存储系统包括磁阻（MR）感测元件，用于感测来自参考地的记录介质的数据;以及放大器电路，其包括偏置级，放大级和匹配级，每个参考公共电源电压源和地面。偏置级包括用于以恒定电流选择性地偏置每个MR元件的参考电流源，并且在这样做时，开发具有第一直流分量的单端电压信号。放大级将单端电压信号转换成具有第二直流分量的放大的单端输出电压信号，其中第一直流分量被消除。匹配级产生偏置并且在放大级上施加所述偏置，用于将单端输出电压信号转换成消除第二直流分量的差分输出电压信号。

2. 发明授权

US5296975A High-transition-rate, low-supply-voltage write driver circuitry for magnetic inductive write head 失效
标题翻译：用于磁感应写头的高转换速率低电压写驱动电路
公开(公告)号：US5296975A
公开(公告)日：1994-03-22
申请号：US958635
申请日：1992-10-09
申请人： John T. Contreras , Stephen A. Jove , Klaas B. Klassen , Jacobus C. Leonardus van Peppen
发明人： John T. Contreras , Stephen A. Jove , Klaas B. Klassen , Jacobus C. Leonardus van Peppen
IPC分类号： G11B5/00 , G11B5/012 , G11B5/09 , G11B5/40 , G11B5/02 , G11B15/12
CPC分类号： G11B5/022 , G11B5/012 , G11B5/09 , G11B5/40 , G11B2005/0013
摘要： Writing of data on a storage disk by an inductive magnetic transducer is modulated by write driver circuitry that includes a supply voltage as low as three volts provided by a source referenced to ground, and a bias current source connected to either the supply voltage source or ground. Two bias control switches respectively direct the bias current to one or the other of two current gain circuits according to whether a positive or a negative input terminal has a preselected polarity. The gain circuits selectively respond to the bias currents supplied by the associated control switch for amplifying the bias current to remove a write current from a respective associated terminal of the transducer. Two current source switches connected to a respective one of the input terminals and to a respective one of the terminals of the transducer selectively allow and prevent the write current from flowing into the respective associated terminal of the transducer depending upon which of the input terminals has the preselected polarity. When data is not being written by the transducer, a controllable reference voltage circuit maintains the transducer at a potential at least as negative as ground to prevent electro-erosion of the transducer; and this circuit also is preferably connected to both gain circuits to prevent them from saturating.
摘要翻译：由感应式磁换能器在存储盘上写入数据由写入驱动器电路调制，该驱动器电路包括由参考地的源提供的低至三伏的电源电压，以及连接到电源电压源或接地的偏置电流源。两个偏置控制开关根据正或负输入端子是否具有预选极性，分别将偏置电流引导到两个电流增益电路中的一个或另一个。增益电路选择性地响应由相关联的控制开关提供的偏置电流，用于放大偏置电流以从换能器的相应相关联的端子去除写入电流。连接到相应的一个输入端子和换能器的相应一个端子的两个电流源开关选择性地允许和防止写入电流流入换能器的相关联的端子，这取决于哪个输入端子具有预选极性。当数据未被换能器写入时，可控参考电压电路将换能器保持至少与地面一样的电位，以防止换能器的电蚀; 并且该电路也优选地连接到两个增益电路以防止它们饱和。

3. 发明授权

US08305712B2 Tunable microstrip signal transmission path in a hard disk drive 有权
标题翻译：可调式微带信号传输路径在硬盘驱动器
公开(公告)号：US08305712B2
公开(公告)日：2012-11-06
申请号：US12646612
申请日：2009-12-23
申请人： John T. Contreras , Luiz Franca-Neto , Stephen Williams
发明人： John T. Contreras , Luiz Franca-Neto , Stephen Williams
IPC分类号： G11B5/55
CPC分类号： G11B5/486 , G11B5/484 , Y10T29/49169
摘要： A disk pack, comprising at least one hard disk, is rotatably mounted to a housing. The disk pack defines an axis of rotation and a radial direction relative to the axis. At least one actuator mounted to the housing is coupled with a suspension and is movable relative to the disk pack. A slider, comprising a slider body and a head configured to read data from and write data to at least one hard disk, is coupled with the suspension. A first suspension electrical interconnect is configured to electrically couple a first signal conducting pathway with the slider and with a first non-terminated signal pathway. A second suspension electrical interconnect is configured to electrically couple a second signal conducting pathway with the slider and with a second non-terminated signal pathway. The length of the second non-terminated signal pathway is selected to achieve a desired impedance level.
摘要翻译：包括至少一个硬盘的盘组件可旋转地安装到壳体。磁盘盒定义了一个旋转轴线和一个相对于轴线的径向方向。安装到壳体的至少一个致动器与悬架联接并且可相对于盘组件移动。包括滑块体和被配置为从至少一个硬盘读取数据并将数据写入至少一个硬盘的磁头的滑块与该悬架联接。第一悬挂电互连被配置为将第一信号传导路径与滑块电耦合并具有第一非终端信号路径。第二悬挂电互连被配置为将第二信号传导路径与滑块电连接，并且具有第二非终止信号路径。选择第二非终止信号路径的长度以实现期望的阻抗水平。

4. 发明授权

US08842383B1 Laser power sensor with dual temperature sensor 有权
标题翻译：带双温度传感器的激光功率传感器
公开(公告)号：US08842383B1
公开(公告)日：2014-09-23
申请号：US13907157
申请日：2013-05-31
申请人： Hamid Balamane , John T. Contreras , Samir Garzon , Fu-Ying Huang , Lidu Huang , Barry C. Stipe
发明人： Hamid Balamane , John T. Contreras , Samir Garzon , Fu-Ying Huang , Lidu Huang , Barry C. Stipe
IPC分类号： G11B27/36
CPC分类号： G11B5/40 , G11B5/3106 , G11B5/3136 , G11B5/314 , G11B2005/0021
摘要： Embodiments of the present invention generally relate to a HAMR device having two temperature sensors disposed between a near field transducer (NFT) and a return pole. The two temperature sensors are aligned in a cross-track direction.
摘要翻译：本发明的实施例一般涉及具有设置在近场换能器（NFT）和返回极之间的两个温度传感器的HAMR装置。两个温度传感器在交叉轨道方向上对齐。

5. 发明授权

US06356113B1 Recording channel with voltage-type write driver for use with transmission-line interconnect 失效
标题翻译：带有电压式写入驱动器的记录通道，用于传输线互连
公开(公告)号：US06356113B1
公开(公告)日：2002-03-12
申请号：US09474013
申请日：1999-12-28
申请人： John T. Contreras , David Anthony Freitas , Klaassen Berend Klaassen
发明人： John T. Contreras , David Anthony Freitas , Klaassen Berend Klaassen
IPC分类号： H03K19175
CPC分类号： H03K19/017545 , G11B5/012 , G11B5/02 , G11B5/09 , G11B20/10 , G11B2005/0013
摘要： A recording channel front-end circuit for driving a write element over a transmission line interconnect provides the improved performance during writing of information. In one embodiment, the recording channel front-end circuit includes a voltage-type write driver coupled to the transmission line interconnect and operable to output a write driver signal to the transmission line interconnect and a receiver termination circuit coupling the transmission line interconnect to the write element. The receiver termination circuit may include an impedance matching network operable match a terminal impedance of the write element to be substantially equal to a characteristic impedance of the transmission line interconnect. In another embodiment, the recording channel front-end circuit includes a voltage-type write driver coupled to the transmission line interconnect and operable to output a write driver signal to the transmission line interconnect and a source termination circuit coupling the voltage-type write driver to the transmission line interconnect. The source termination circuit may include an impedance matching circuit operable match a terminal impedance of the voltage-type write driver to be substantially equal to a characteristic impedance of the transmission line interconnect.
摘要翻译：用于通过传输线互连驱动写元件的记录通道前端电路在写入信息期间提供了改进的性能。在一个实施例中，记录通道前端电路包括耦合到传输线互连的电压型写入驱动器，并且可操作以将写入驱动器信号输出到传输线互连和将传输线互连耦合到写入的接收器终端电路元件。接收器终端电路可以包括可操作地匹配写入元件的端子阻抗的阻抗匹配网络，其基本上等于传输线互连的特性阻抗。在另一个实施例中，记录通道前端电路包括耦合到传输线互连的电压型写入驱动器，可操作以将写入驱动器信号输出到传输线互连，以及将电压型写入驱动器耦合到传输线互连。源极端子电路可以包括可操作地匹配电压型写入驱动器的端子阻抗的阻抗匹配电路，其基本上等于传输线互连的特性阻抗。

6. 发明授权

US08310789B2 Conductor suspension structure and electrical connection assembly for transmitting complementary signals in a hard disk drive 有权
标题翻译：导体悬挂结构和电气连接组件，用于在硬盘驱动器中传输互补信号
公开(公告)号：US08310789B2
公开(公告)日：2012-11-13
申请号：US12645217
申请日：2009-12-22
申请人： John T. Contreras , Nobumasa Nishiyama , Xinzhi Xing
发明人： John T. Contreras , Nobumasa Nishiyama , Xinzhi Xing
IPC分类号： G11B5/55
CPC分类号： G11B5/486 , G11B5/484
摘要： An integrated conductor/suspension structure for supporting and electrically connecting a write/read head in a hard disk drive and methods of making the conductor/suspension structure are provided. The integrated conductor/suspension structure may allow for an increased characteristic-impedance range, greater interference shielding and a reduction of signal loss that is contributed by a lossy conductive substrate. The suspension structure includes apertures formed therein that result in a reduction in the lossy material and its effect on the electrical signals. In addition, the conductor/suspension structure of the present invention provides shielding to reduce the interference from external electric fields.
摘要翻译：提供了用于支持和电连接硬盘驱动器中的写/读头的集成导体/悬挂结构以及制造导体/悬架结构的方法。集成导体/悬置结构可以允许增加的特性阻抗范围，更大的干扰屏蔽和由有损导电基底所贡献的信号损失的降低。悬挂结构包括形成在其中的孔，其导致有损材料的减少及其对电信号的影响。此外，本发明的导体/悬架结构提供屏蔽以减少来自外部电场的干扰。

7. 发明授权

US08598460B2 Interleaved conductor structure with offset traces 有权
标题翻译：具有偏移迹线的交错导体结构
公开(公告)号：US08598460B2
公开(公告)日：2013-12-03
申请号：US12976821
申请日：2010-12-22
申请人： John T. Contreras , Nobumasa Nishiyama , Edgar D. Rothenberg , Rehan A. Zakai , Yiduo Zhang
发明人： John T. Contreras , Nobumasa Nishiyama , Edgar D. Rothenberg , Rehan A. Zakai , Yiduo Zhang
IPC分类号： H01B11/00
CPC分类号： G11B5/486 , G11B5/484
摘要： An interleaved conductor structure for electrically connecting the read/write electronics to a read/write head in a hard disk drive is provided. The interleaved conductor structure may allow for an increased characteristic-impedance range, greater interference shielding and a reduction of signal loss that is contributed by a lossy conductive substrate. The electrical traces may have different widths, be offset, or even wrap around each other at the via connections.
摘要翻译：提供了用于将读/写电子学电连接到硬盘驱动器中的读/写头的交错导体结构。交错的导体结构可以允许增加的特性阻抗范围，更大的干扰屏蔽和降低由有损导电基底所贡献的信号损失。电迹线可能具有不同的宽度，偏移，或甚至在通孔连接处彼此缠绕。

8. 发明申请

US20110157740A1 FLY-HEIGHT MANAGEMENT IN A HARD DISK DRIVE (HDD) 有权
标题翻译：硬盘驱动器（HDD）中的飞行管理
公开(公告)号：US20110157740A1
公开(公告)日：2011-06-30
申请号：US12651161
申请日：2009-12-31
申请人： Peter BAUMGART , Martin Yu-Wen Chen , John T. Contreras , Sujit Kirpekar , Bernhard E. Knigge
发明人： Peter BAUMGART , Martin Yu-Wen Chen , John T. Contreras , Sujit Kirpekar , Bernhard E. Knigge
IPC分类号： G11B21/12
CPC分类号： G11B5/6005 , G11B5/6064 , G11B5/607 , G11B5/6076
摘要： A hard disk drive (HDD) including a first resistive temperature detector (RTD) configured to detect a temperature generated by proximity of a slider and a media. The first RTD is proximate an air bearing surface (ABS) of the slider. The HDD also includes a second RTD configured to detect at least one temperature correlated to a fly-height of the slider. The second RTD is not required to be proximate the ABS of the slider. HDD also includes a read/write integrated circuit (IC) configured to determine the fly-height of the slider based on detection of temperatures by the first RTD and the second RTD.
摘要翻译：一种硬盘驱动器（HDD），包括被配置为检测由滑块和介质的靠近产生的温度的第一电阻温度检测器（RTD）。第一个RTD靠近滑块的空气轴承表面（ABS）。 HDD还包括被配置为检测与滑块的飞行高度相关的至少一个温度的第二RTD。第二个RTD不需要靠近滑块的ABS。 HDD还包括被配置为基于通过第一RTD和第二RTD检测温度来确定滑块的飞行高度的读/写集成电路（IC）。

9. 发明授权

US07660068B1 Method and system for pre-contact detection and active damping of air bearing vibrations in a hard disk drive 有权
标题翻译：用于预接触检测和主动阻尼硬盘驱动器中的空气轴承振动的方法和系统
公开(公告)号：US07660068B1
公开(公告)日：2010-02-09
申请号：US12212739
申请日：2008-09-18
申请人： Peter M. Baumgart , John T. Contreras , Luiz Franca-Neto , Bernhard E. Knigge , Richard Kroeker , Gurinder P. Singh
发明人： Peter M. Baumgart , John T. Contreras , Luiz Franca-Neto , Bernhard E. Knigge , Richard Kroeker , Gurinder P. Singh
IPC分类号： G11B21/02 , G11B15/64
CPC分类号： G11B5/40 , G11B5/6017 , G11B5/6064 , G11B5/607 , G11B5/6076
摘要： In a method of pre-contact detection and active damping of air bearing vibrations in a hard disk drive, a slider is isolated from ground. The slider is then capacitively coupled with a hard disk of the hard disk drive via a thermal fly-height control (TFC) heating element. An alternating current (AC) signal is applied to the slider via the TFC heating element to control the amplitude of the slider.
摘要翻译：在硬盘驱动器中的预接触检测和空气轴承振动的主动阻尼的方法中，滑块与地面隔离。然后滑块经由热飞高控制（TFC）加热元件与硬盘驱动器的硬盘电容耦合。通过TFC加热元件将交流（AC）信号施加到滑块以控制滑块的振幅。

10. 发明授权

US06340882B1 Accurate current source with an adjustable temperature dependence circuit 失效
标题翻译：具有可调温度相关电路的精确电流源
公开(公告)号：US06340882B1
公开(公告)日：2002-01-22
申请号：US09678563
申请日：2000-10-03
申请人： Paul W. Chung , John T. Contreras
发明人： Paul W. Chung , John T. Contreras
IPC分类号： G05F316
CPC分类号： G05F3/225
摘要： An accurate current source with an adjustable temperature dependence. This type of current source is used in silicon Integrated Circuit (IC) designs requiring supporting reference-voltage sources and/or reference-current sources which may be designed with or without temperature dependence. The circuit generates an accurate current with temperature independence along with another accurate current source with temperature dependence using only one precision external resistors. For the temperature-dependent current source, the temperature dependence can be controlled by setting a temperature dependence factor (TDF).
摘要翻译：具有可调温度依赖性的精确电流源。这种电流源用于需要支持参考电压源和/或参考电流源的硅集成电路（IC）设计，可以设计有或没有温度依赖性。该电路产生与温度无关的精确电流以及仅使用一个精密外部电阻的温度依赖性的另一个精确电流源。对于依赖于温度的电流源，可以通过设置温度依赖因子（TDF）来控制温度依赖性。

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