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1. 发明授权

US5532584A MR sensor including calibration circuit wherein signals are averaged for determining a correction factor and pole pieces are shaped to reduce field in gap therebetween 失效
标题翻译： MR传感器包括其中信号被平均以确定校正因子的校准电路，并且极片被成形为减小其间的间隙
公开(公告)号：US5532584A
公开(公告)日：1996-07-02
申请号：US330639
申请日：1994-10-28
申请人： Frederick J. Jeffers , Neil Smith , Jay D. Freeman , Kent R. Gandola , Peter V. Koeppe
发明人： Frederick J. Jeffers , Neil Smith , Jay D. Freeman , Kent R. Gandola , Peter V. Koeppe
IPC分类号： G01R33/02 , G01R33/09 , G01R33/12 , G01V3/08 , G06K7/01 , G06K7/08 , G07D7/00 , G07D7/04 , G07D7/20 , G07F7/08 , G11B5/02 , G11B5/39 , H01L43/08 , G01R35/02 , G01D18/00
CPC分类号： G01R33/1207 , G01R33/09 , G01R33/096 , G01V3/08 , G01V3/081 , G06K7/084 , G07D7/04 , G07D7/20 , G07F7/086
摘要： A magnetic assembly for detection and authentication of magnetic documents. The magnetic assembly includes a permanent magnet (PM), first and second magnetically soft high permeability pole pieces shaped to form a tapered, variable gap size magnetic circuit with the permanent magnet. The PM is located at a first gap between the first and second pole pieces. A magnetoresistive (MR) sensing element is located at or near the center of a second gap between said first and second pole pieces. The second gap and MR sensing element are proximate a magnetic document to be sensed. An electrical conductor is adjacent to the MR sensing element, but is electrically insulated therefrom.
摘要翻译：用于磁性文件检测和认证的磁性组件。磁性组件包括永磁体（PM），第一和第二磁性软磁性高磁导率极片，其形状与永磁体形成锥形可变间隙尺寸的磁路。 PM位于第一和第二极片之间的第一间隙。磁阻（MR）感测元件位于所述第一和第二极片之间的第二间隙的中心处或附近。第二间隙和MR感测元件靠近要被感测的磁性文件。电导体与MR感测元件相邻，但与其电绝缘。

2. 发明授权

US5629620A Apparatus and method for measurement of magnetic remanence-thickness product of thin magnetic layers 失效
标题翻译：用于测量薄磁层的磁残余厚度乘积的装置和方法
公开(公告)号：US5629620A
公开(公告)日：1997-05-13
申请号：US398197
申请日：1995-03-02
申请人： Frederick J. Jeffers , Neil Smith
发明人： Frederick J. Jeffers , Neil Smith
IPC分类号： G01N27/72 , G01R33/09 , G01R33/12 , G01N27/76
CPC分类号： G01R33/1207 , G01N27/72 , G01R33/09
摘要： In the simplest embodiment of the invention, the apparatus holds the edge of the magnetized film to be measured close to, and above, a linearly biased magnetoresistive (MR) element. Magnetic poles appearing at the magnetic discontinuity at the edge of the film generate a magnetic field which is incident on the MR element, and which results in a measurable change in the element's resistivity. In a preferred embodiment, a pair of MR elements are placed so that they are both linearly biased by a magnet; only one of the MR elements being in close proximity to, and influenced by the magnetic field emanating from the edge of the magnetized film. The second MR element, selected for matched characteristics with the first MR element, is located out of the field of the magnetized film, but still subject to the same temperature environment and field noise as the first MR element. The two MR elements are configured with associated resistors as arms of a Wheatstone bridge so that the common mode fields and thermal drift signals experienced by both MR elements are canceled to the first order, and the output of the bridge is proportional to the change in resistance in the first MR element due only to the field of the magnetized film.
摘要翻译：在本发明的最简单的实施例中，该装置将被测量的被测磁片的边缘保持在线性偏置的磁阻（MR）元件上方和之上。出现在膜边缘处的磁性不连续处的磁极产生入射在MR元件上的磁场，并导致元件电阻率的可测量的变化。在优选实施例中，一对MR元件被放置成使得它们都被磁体线性偏置; 只有一个MR元件紧邻并受到从磁化膜的边缘发出的磁场的影响。被选择用于与第一MR元件的匹配特性的第二MR元件位于磁化膜的场外，但仍然受到与第一MR元件相同的温度环境和场噪声的影响。两个MR元件配置有相关联的电阻器作为惠斯通电桥的臂，使得由两个MR元件经受的共模场和热漂移信号被抵消到一阶，并且桥的输出与电阻的变化成比例在第一MR元件中仅由于磁化膜的场。

3. 发明授权

US5239435A Laminated magnetic record/playback head with thin films of high permeability material spaced apart by very thin films of insulating magnetic material for high bit densities and data transfer rates 失效
标题翻译：具有高渗透性材料的薄膜的层压磁记录/回放头通过非常薄的绝缘磁性材料薄膜，用于高双面密度和数据传输速率
公开(公告)号：US5239435A
公开(公告)日：1993-08-24
申请号：US674011
申请日：1991-03-25
申请人： Frederick J. Jeffers , Neil Smith
发明人： Frederick J. Jeffers , Neil Smith
IPC分类号： G11B5/187 , G11B5/21 , G11B5/31
CPC分类号： G11B5/1872 , G11B5/21 , G11B5/3143
摘要： A thin film magnetic record/playback head having suitably thin layers of soft, high permeability magnetic material, such as permalloy, electrically insulated from each other by very thin layers of a magnetic material having suitably high resistivity, such as NiZn ferrite. The improved magnetic record/playback head is capable of reading and writing much higher bit densities (up to about 100 kfci) and at much higher frequencies (100 MHz or higher) than prior art devices while remaining fully compatible with existing electronic circuitry.
摘要翻译：薄膜磁记录/重放头具有适当薄层的柔软，高磁导率磁性材料，例如坡莫合金，通过非常薄的具有适当高电阻率的磁性材料的诸如NiZn铁氧体彼此绝缘。改进的磁记录/重放头能够读取和写入比现有技术的设备高得多的比特密度（高达约100kfci）和高得多的频率（100MHz或更高），同时与现有的电子电路保持完全兼容。

4. 发明授权

US5119025A High-sensitivity magnetorresistive magnetometer having laminated flux collectors defining an open-loop flux-conducting path 失效
标题翻译：具有限定开环导通路径的层叠磁通收集器的高灵敏度磁阻磁力计
公开(公告)号：US5119025A
公开(公告)日：1992-06-02
申请号：US737755
申请日：1991-07-30
申请人： Neil Smith , Frederick J. Jeffers
发明人： Neil Smith , Frederick J. Jeffers
IPC分类号： G01R33/09
CPC分类号： G01R33/09
摘要： A magnetometer includes a magnetoresistive element and first and second high-permeable laminated flux collectors of height H partially overlapping, respectively, opposing lateral edges of the magnetoresistive element, wherein the flux collectors are separated laterally by a gap of length G which the magnetoresistive element spans. The two laminated flux collector and the magnetoresistive element cooperatively form an open-loop flux-conducting path of total height 2H+G, that is capable of collecting flux of a magnetic field being measured and, in response to the flux collected, developing a magnetometive force across the gap G that is functionally related to the height of the flux collectors.
摘要翻译：磁力计包括磁阻元件和分别与磁阻元件相对的横向边缘部分重叠的高度为H的第一和第二高透过率层叠磁通收集器，其中磁通收集器横向分开长度G的间隙，磁阻元件跨越。两个层叠的磁通收集器和磁阻元件协同地形成总高度为2H + G的开环磁通传导路径，其能够收集被测量的磁场的磁通量，并且响应于所收集的磁通量而形成磁力计功能上与通量收集器的高度相关的间隙G的力。

5. 发明授权

US06372338B1 Spherical magnetic particles for magnetic recording media 失效
标题翻译：用于磁记录介质的球形磁性颗粒
公开(公告)号：US06372338B1
公开(公告)日：2002-04-16
申请号：US09196009
申请日：1998-11-19
申请人： Frederick J. Jeffers , Bradford D. West , Robert O. James , Frederick R. Chamberlain, IV , Neil Smith , Ronald M. Wexler
发明人： Frederick J. Jeffers , Bradford D. West , Robert O. James , Frederick R. Chamberlain, IV , Neil Smith , Ronald M. Wexler
IPC分类号： G11B05714
CPC分类号： G11B5/633 , G03C5/14 , G03C11/02 , G06K19/06196 , G11B5/70678 , G11B5/714 , Y10S428/90 , Y10T428/25 , Y10T428/257
摘要： A particulate magnetic recording media wherein the magnetic particles are substantially spherical. The spherical particle shape makes possible a media which is magnetically isotropic, well dispersed and low in noise, and free of magnetically inferior broken particles.
摘要翻译：一种颗粒状磁记录介质，其中磁性颗粒基本上是球形的。球形颗粒形状使磁性各向同性，分散性好，噪音低，无劣质破碎颗粒的介质成为可能。

6. 发明授权

US5260653A Thin film very high sensitivity magnetoresistive magnetometer having temperature compensation and simple domain stability 失效
标题翻译：具有温度补偿和简单的域稳定性的薄膜非常高灵敏度的磁阻磁力计
公开(公告)号：US5260653A
公开(公告)日：1993-11-09
申请号：US892872
申请日：1992-06-03
申请人： Neil Smith , Jay D. Freeman , Frederick J. Jeffers
发明人： Neil Smith , Jay D. Freeman , Frederick J. Jeffers
IPC分类号： G01R33/09 , H01L43/08 , G01R33/06
CPC分类号： G01R33/09
摘要： A thin film magnetometer includes first and second thin film magnetoresistive elements and first and second thin film laminated flux collectors. The first magnetoresistive element is located in a gap formed by the flux collectors, and the second magnetoresistive element is subtantially magnetically shielded by the flux collectors, and acts as a thermistor. The magnetoresistive elements are connected in a bridge circuit whereby any signal component due to thermal effects on the magnetoresistive elements is removed from the signal produced by the first magnetoresistive element.

7. 发明授权

US5552589A Permanent magnet assembly with MR element for detection/authentication of magnetic documents 失效
标题翻译：具有用于磁性文件检测/认证的MR元件的永久磁铁组件
公开(公告)号：US5552589A
公开(公告)日：1996-09-03
申请号：US330887
申请日：1994-10-28
申请人： Neil Smith , Frederick J. Jeffers , Kent R. Gandola , Peter V. Koeppe
发明人： Neil Smith , Frederick J. Jeffers , Kent R. Gandola , Peter V. Koeppe
IPC分类号： G01R33/09 , G01R33/12 , G01V3/08 , G06K7/01 , G06K7/08 , G07D7/00 , G07D7/04 , G07D7/20 , G07F7/08 , G11B5/02 , G11B5/39 , H01L43/08
CPC分类号： G01R33/09 , G01R33/096 , G01R33/1207 , G01V3/08 , G01V3/081 , G06K7/084 , G07D7/04 , G07D7/20 , G07F7/086
摘要： A magnetic assembly for detection and authentication of magnetic documents. The magnetic assembly includes a permanent magnet (PM), first and second magnetically soft high permeability pole pieces shaped to form a tapered, variable gap size magnetic circuit with the permanent magnet. The PM is located at a first gap between the first and second pole pieces. A magnetoresistive (MR) sensing element is located at or near the center of a second gap between said first and second pole pieces. The second gap and MR sensing element are proximate a magnetic document to be sensed.
摘要翻译：用于磁性文件检测和认证的磁性组件。磁性组件包括永磁体（PM），第一和第二磁性软磁性高磁导率极片，其形状与永磁体形成锥形可变间隙尺寸的磁路。 PM位于第一和第二极片之间的第一间隙。磁阻（MR）感测元件位于所述第一和第二极片之间的第二间隙的中心处或附近。第二间隙和MR感测元件靠近要被感测的磁性文件。

8. 发明申请

US20190036433A1 Multi-Dimensional Layered Pulse Motor 审中-公开
公开(公告)号：US20190036433A1
公开(公告)日：2019-01-31
申请号：US16071912
申请日：2017-02-18
申请人： Neil Smith
发明人： Neil Smith
IPC分类号： H02K21/24 , H02K7/00 , H02K7/08 , H02P3/10 , H02P3/14 , B60L7/10 , B60K7/00
摘要： A pulse hub motor having coils (101) and magnets (107) interacting three dimensionally in x, y, and z axes to facilitate both increased power and efficiency through the ability to have more coils (101) in the motor, have each coil (101) perform both push and pull functions, and yet have the flexibility to only use the amount of coils (101) needed for real-time power requirements, whilst regenerating power in both normal drive and braking modes.

9. 发明申请

US20130148224A1 IMPLEMENTING SPIN-TORQUE OSCILLATOR SENSING WITH ENHANCED INTEGRATED DEMODULATOR FOR HARD DISK DRIVES 有权
标题翻译：用于硬盘驱动器的增强型集成式解调器实现旋转振动振荡器感应
公开(公告)号：US20130148224A1
公开(公告)日：2013-06-13
申请号：US13316419
申请日：2011-12-09
申请人： Patrick Mesquita Braganca , Richard Leo Galbraith , Bruce Alvin Gurney , Neil Smith , Bruce Wilson , Rehan Ahmed Zakai
发明人： Patrick Mesquita Braganca , Richard Leo Galbraith , Bruce Alvin Gurney , Neil Smith , Bruce Wilson , Rehan Ahmed Zakai
IPC分类号： G11B20/06
CPC分类号： H03D3/009 , G11B20/10018 , G11B20/10027 , G11B2220/2516
摘要： A method, apparatus, and system are provided for implementing spin-torque oscillator sensing with an enhanced integrated demodulator for hard disk drives. The demodulator receives an input signal from a STO read sensor having an oscillation frequency ω related to the strength of the detected magnetic signal field. The demodulator includes a pair of mixers coupled to a quadrature reference oscillator with respective quadrature components cos(ω0t), and sin(ω0t) of the quadrature reference oscillator being mixed with a received input signal to form signals at the sum and difference frequencies, ω±ω0. Each of these mixer products is lowpass filtered by a respective a lowpass filter to remove the sum frequency components for providing a demodulator output signal that is directly proportional the STO oscillation frequency ω. The demodulator output signal is used for processing by data detection electronics.
摘要翻译：提供了一种用于通过用于硬盘驱动器的增强型集成解调器来实现自旋扭矩振荡器感测的方法，装置和系统。解调器接收来自具有与所检测的磁信号场的强度相关的振荡频率ω的STO读取传感器的输入信号。解调器包括耦合到具有相应正交分量cos（ωωt）的正交参考振荡器的正交参考振荡器对，并且正交基准振荡器的sin（ω0t）与接收的输入信号混合以形成和频率和差频率ω ±omega0。这些混频器产品中的每一个由相应的低通滤波器进行低通滤波，以去除和频分量，以提供与STO振荡频率ω直接成比例的解调器输出信号。解调器输出信号用于数据检测电子设备的处理。

10. 发明授权

US08305715B2 Magnetoresistance (MR) read elements having an active shield 有权
标题翻译：磁阻（MR）读取元件具有主动屏蔽
公开(公告)号：US08305715B2
公开(公告)日：2012-11-06
申请号：US11965532
申请日：2007-12-27
申请人： Daniele Mauri , Neil Smith
发明人： Daniele Mauri , Neil Smith
IPC分类号： G11B5/39
CPC分类号： B82Y25/00 , G01R33/093 , G01R33/098 , G11B5/3912
摘要： Read elements and associated methods of fabrication are disclosed. A read element as described herein includes a magnetoresistance (MR) sensor sandwiched between first and second shields. The read element uses the first shield as an active portion of the MR sensor. Instead of implementing an AFM pinning layer in the MR sensor, the first shield takes the place of the AFM pinning layer. The first shield is orthogonally coupled to the pinned layer through an orthogonal coupling layer, such as a thin layer of AFM material. Through this structure, the magnetic moment of the first shield pins the magnetic moment of the pinned layer transverse to the ABS of the read element, and an AFM pinning layer is not needed.
摘要翻译：公开了读取元件和相关联的制造方法。如本文所述的读取元件包括夹在第一和第二屏蔽之间的磁阻（MR）传感器。读取元件使用第一屏蔽作为MR传感器的有效部分。代替在MR传感器中实现AFM钉扎层，第一个屏蔽取代了AFM钉扎层。第一屏蔽层通过正交耦合层（例如AFM材料的薄层）与被钉扎层正交耦合。通过这种结构，第一屏蔽的磁矩将钉扎层的磁矩横向于读取元件的ABS，并且不需要AFM钉扎层。

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