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1. 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。

2. 发明申请

US20130148223A1 IMPLEMENTING SPIN-TORQUE OSCILLATOR SENSING WITH ENHANCED DEMODULATOR FOR HARD DISK DRIVES 有权
标题翻译：用于硬盘驱动器的增强型解调器实现旋转扭矩振荡器
公开(公告)号：US20130148223A1
公开(公告)日：2013-06-13
申请号：US13316342
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： G11B5/09 , G11B20/06
CPC分类号： G11B5/02 , G01R33/093 , G01R33/1284 , G11B5/3903 , G11B20/10018 , G11B2005/0016 , G11B2220/2516 , H03B15/006
摘要： A method, apparatus, and system are provided for implementing spin-torque oscillator (STO) sensing with a demodulator for hard disk drives. The demodulator measures an instantaneous phase of the readback signal from a STO sensor and converts the readback signal into a signal that is proportional to the magnetic field affecting the STO frequency during a bit time. The converted signal is used for processing by conventional data detection electronics.
摘要翻译：提供了一种用于实现用于硬盘驱动器的解调器的自旋扭矩振荡器（STO）感测的方法，装置和系统。解调器测量来自STO传感器的回读信号的瞬时相位，并将回读信号转换成与位时间内影响STO频率的磁场成比例的信号。转换的信号用于常规数据检测电子设备的处理。

3. 发明授权

US08570677B2 Implementing spin-torque oscillator sensing with enhanced integrated demodulator for hard disk drives 有权
标题翻译：通过增强的集成解调器实现用于硬盘驱动器的自旋扭矩振荡器感应
公开(公告)号：US08570677B2
公开(公告)日：2013-10-29
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 , G11B5/02 , G11B21/02
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。

4. 发明授权

US08553346B2 Implementing spin-torque oscillator sensing with enhanced delay control feedback circuit for hard disk drives 有权
标题翻译：实现旋转扭矩振荡器感应与增强的延迟控制反馈电路硬盘驱动器
公开(公告)号：US08553346B2
公开(公告)日：2013-10-08
申请号：US13316407
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 , G11B21/02
CPC分类号： G11B5/02 , G11B5/3903 , G11B2005/0016
摘要： A method, apparatus, and system for implementing spin-torque oscillator (STO) sensing with an enhanced delay control feedback circuit for hard disk drives. A detector receives an input signal from a STO read sensor having an oscillation frequency related to the strength of the detected magnetic signal field. The received input signal is mixed with a time delayed input signal for providing a detector output signal. A low frequency component signal of the detector output signal is monitored and a delay control feedback is applied to an adjustable time delay to bias the DC signal of the detector output signal.
摘要翻译：一种用于实现用于硬盘驱动器的增强型延迟控制反馈电路实现自旋扭矩振荡器（STO）感测的方法，装置和系统。检测器从具有与所检测的磁信号场的强度相关的振荡频率的STO读取传感器接收输入信号。所接收的输入信号与用于提供检测器输出信号的时间延迟输入信号混合。监视检测器输出信号的低频分量信号，并将延迟控制反馈应用于可调节的时间延迟以偏置检测器输出信号的DC信号。

5. 发明授权

US08654465B2 Implementing spin-torque oscillator sensing with enhanced demodulator for hard disk drives 有权
标题翻译：通过增强的解调器实现用于硬盘驱动器的自旋扭矩振荡器感应
公开(公告)号：US08654465B2
公开(公告)日：2014-02-18
申请号：US13316342
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 , G11B5/02
CPC分类号： G11B5/02 , G01R33/093 , G01R33/1284 , G11B5/3903 , G11B20/10018 , G11B2005/0016 , G11B2220/2516 , H03B15/006
摘要： A method, apparatus, and system are provided for implementing spin-torque oscillator (STO) sensing with a demodulator for hard disk drives. The demodulator measures an instantaneous phase of the readback signal from a STO sensor and converts the readback signal into a signal that is proportional to the magnetic field affecting the STO frequency during a bit time. The converted signal is used for processing by conventional data detection electronics.
摘要翻译：提供了一种用于实现用于硬盘驱动器的解调器的自旋扭矩振荡器（STO）感测的方法，装置和系统。解调器测量来自STO传感器的回读信号的瞬时相位，并将回读信号转换成与位时间内影响STO频率的磁场成比例的信号。转换的信号用于常规数据检测电子设备的处理。

6. 发明申请

US20130148229A1 IMPLEMENTING SPIN-TORQUE OSCILLATOR SENSING WITH ENHANCED DELAY CONTROL FEEDBACK CIRCUIT FOR HARD DISK DRIVES 有权
标题翻译：用于硬盘驱动器的增强型延迟控制反馈电路实现旋转振动振荡器
公开(公告)号：US20130148229A1
公开(公告)日：2013-06-13
申请号：US13316407
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： G11B5/02
CPC分类号： G11B5/02 , G11B5/3903 , G11B2005/0016
摘要： A method, apparatus, and system for implementing spin-torque oscillator (STO) sensing with an enhanced delay control feedback circuit for hard disk drives. A detector receives an input signal from a STO read sensor having an oscillation frequency related to the strength of the detected magnetic signal field. The received input signal is mixed with a time delayed input signal for providing a detector output signal. A low frequency component signal of the detector output signal is monitored and a delay control feedback is applied to an adjustable time delay to bias the DC signal of the detector output signal.
摘要翻译：一种用于实现用于硬盘驱动器的增强型延迟控制反馈电路实现自旋扭矩振荡器（STO）感测的方法，装置和系统。检测器从具有与所检测的磁信号场的强度相关的振荡频率的STO读取传感器接收输入信号。所接收的输入信号与用于提供检测器输出信号的时间延迟输入信号混合。监视检测器输出信号的低频分量信号，并将延迟控制反馈应用于可调节的时间延迟以偏置检测器输出信号的DC信号。

7. 发明申请

US20120307404A1 THREE-TERMINAL SPIN-TORQUE OSCILLATOR (STO) 有权
标题翻译：三端旋转振荡器（STO）
公开(公告)号：US20120307404A1
公开(公告)日：2012-12-06
申请号：US13149419
申请日：2011-05-31
申请人： Patrick Mesquita Braganca , Bruce Alvin Gurney , Jordan Asher Katine
发明人： Patrick Mesquita Braganca , Bruce Alvin Gurney , Jordan Asher Katine
IPC分类号： G11B5/48 , H03B7/14
CPC分类号： H01F10/3254 , G01R33/098 , G01R33/1284 , G11B5/3903 , G11B2005/0005 , H01F10/1936 , H01F10/3286 , H01F10/329 , H01L43/08
摘要： A spin-torque oscillator (STO) has a single free ferromagnetic layer that forms part of both a giant magnetoresistance (GMR) structure with a nonmagnetic conductive spacer layer and a tunneling magnetoresistance (TMR) structure with a tunnel barrier layer. The STO has three electrical terminals that connect to electrical circuitry that provides a spin-torque excitation current through the conductive spacer layer and a lesser sense current through the tunnel barrier layer. When the STO is used as a magnetic field sensor, the excitation current causes the magnetization of the free layer to oscillate at a fixed base frequency in the absence of an external magnetic field. A detector coupled to the sense current detects shifts in the free layer magnetization oscillation frequency from the base frequency in response to external magnetic fields.
摘要翻译：自旋转矩振荡器（STO）具有单个自由铁磁层，其形成具有非磁性导电间隔层的巨磁电阻（GMR）结构和具有隧道势垒层的隧道磁阻（TMR）结构的一部分。 STO具有三个电气端子，其连接到通过导电间隔层提供自旋转矩激励电流的电路和通过隧道势垒层的较小感测电流。当STO用作磁场传感器时，激励电流使得自由层的磁化在没有外部磁场的情况下以固定的基频振荡。耦合到感测电流的检测器响应于外部磁场检测自由层磁化振荡频率从基极频率的偏移。

8. 发明申请

US20130063841A1 THERMAGNONIC SPIN-TORQUE OSCILLATOR(STO) AND SENSOR UTILIZING SAME TO DETECT SHIFTS IN THE FREE LAYER MAGNETIZATION OSCILLATION FREQUENCY 有权
标题翻译： THERMAGNONIC旋转扭矩振荡器（STO）和传感器用于在自由层磁化振荡频率中检测位移
公开(公告)号：US20130063841A1
公开(公告)日：2013-03-14
申请号：US13228429
申请日：2011-09-08
申请人： Patrick Mesquita Braganca , Bruce Alvin Gurney
发明人： Patrick Mesquita Braganca , Bruce Alvin Gurney
IPC分类号： H01L29/82 , G11B5/48
CPC分类号： G01R33/093 , G01R33/098 , G01R33/1284 , G11B5/3903 , G11B2005/0002
摘要： A “thermagnonic” spin-torque oscillator (STO) uses heat flow alone to cause the spin-torque (ST) effect and generate the persistent oscillation of the free layer magnetization. In addition to the conventional free and reference layers, the thermagnonic STO also includes a magnetic oxide layer having a fixed in-plane magnetization, a ferromagnetic metallic layer on one surface of the magnetic oxide layer, a nonmagnetic electrically conductive layer between the free layer and the metallic layer, and an electrically resistive heater on the other surface of the magnetic oxide layer. Due to the thermagnonic effect, heat flow from the magnetic oxide layer through the metallic layer, conductive layer and free layer ultimately results in a spin transfer torque (STT) to the free layer. Electrical sense current flowing in the opposite direction as the heat flow is used to monitor the frequency of oscillation of the free layer magnetization.
摘要翻译：热电偶自旋转矩振荡器（STO）单独使用热流引起自旋转矩（ST）效应，并产生自由层磁化的持续振荡。除了常规的自由和参考层之外，热电偶STO还包括具有固定的平面内磁化的磁性氧化物层，在磁性氧化物层的一个表面上的强磁性金属层，在自由层和自由层之间的非磁性导电层所述金属层和所述磁性氧化物层的另一个表面上的电阻加热器。由于热电偶效应，从氧化物层通过金属层，导电层和自由层的热流最终导致自由层的自旋转移扭矩（STT）。与热流相反的方向流动的电感电流用于监测自由层磁化的振荡频率。

9. 发明申请

US20130009712A1 SPIN-TORQUE OSCILLATOR (STO) WITH MAGNETICALLY DAMPED FREE LAYER 有权
标题翻译：旋转扭矩振荡器（STO），具有无磁阻的自由层
公开(公告)号：US20130009712A1
公开(公告)日：2013-01-10
申请号：US13176378
申请日：2011-07-05
申请人： Patrick Mesquita Braganca , Bruce Alvin Gurney
发明人： Patrick Mesquita Braganca , Bruce Alvin Gurney
IPC分类号： H01S1/02
CPC分类号： G11B5/3932 , G01R33/093 , G01R33/1284 , G11B5/3903 , G11B2005/0005 , H03B28/00
摘要： A spin-torque oscillator (STO) has increased magnetic damping of the oscillating free ferromagnetic layer. The Gilbert magnetic damping parameter (a) is at least 0.05, and preferably greater than 0.05. The free layer may be a any type of conventional ferromagnetic material, but contains one or more damping elements as a dopant. The damping element is selected from the group consisting of Pt, Pd and the 15 lanthanide elements. The free layer damping may also be increased by a damping layer adjacent the free layer. One type of damping layer may be an antiferromagnetic material, like a Mn alloy. As a modification to the antiferromagnetic damping layer, a bilayer damping layer may be formed of the antiferromagnetic layer and a nonmagnetic metal electrically conductive separation layer between the free layer and the antiferromagnetic layer. Another type of damping layer may be one formed of one or more of the elements selected from Pt, Pd and the lanthanides.
摘要翻译：自旋转矩振荡器（STO）增加了振荡自由铁磁层的磁阻尼。吉尔伯特磁阻尼参数（a）至少为0.05，优选大于0.05。自由层可以是任何类型的常规铁磁材料，但是包含作为掺杂剂的一个或多个阻尼元件。阻尼元件选自Pt，Pd和15镧系元素。自由层阻尼也可以通过与自由层相邻的阻尼层来增加。一种类型的阻尼层可以是反铁磁材料，如Mn合金。作为反铁磁阻尼层的修改，双层阻尼层可以由反铁磁层和自由层与反铁磁性层之间的非磁性金属导电分离层形成。另一种类型的阻尼层可以是由选自Pt，Pd和镧系元素中的一种或多种元素形成的阻尼层。

10. 发明授权

US08379352B1 Thermagnonic spin-torque oscillator(STO) and sensor utilizing same to detect shifts in the free layer magnetization oscillation frequency 有权
标题翻译：热电偶自旋扭矩振荡器（STO）和传感器利用它来检测自由层磁化振荡频率的偏移
公开(公告)号：US08379352B1
公开(公告)日：2013-02-19
申请号：US13228429
申请日：2011-09-08
申请人： Patrick Mesquita Braganca , Bruce Alvin Gurney
发明人： Patrick Mesquita Braganca , Bruce Alvin Gurney
IPC分类号： G11B5/39 , G11C11/14
CPC分类号： G01R33/093 , G01R33/098 , G01R33/1284 , G11B5/3903 , G11B2005/0002
摘要： A “thermagnonic” spin-torque oscillator (STO) uses heat flow alone to cause the spin-torque (ST) effect and generate the persistent oscillation of the free layer magnetization. In addition to the conventional free and reference layers, the thermagnonic STO also includes a magnetic oxide layer having a fixed in-plane magnetization, a ferromagnetic metallic layer on one surface of the magnetic oxide layer, a nonmagnetic electrically conductive layer between the free layer and the metallic layer, and an electrically resistive heater on the other surface of the magnetic oxide layer. Due to the thermagnonic effect, heat flow from the magnetic oxide layer through the metallic layer, conductive layer and free layer ultimately results in a spin transfer torque (STT) to the free layer. Electrical sense current flowing in the opposite direction as the heat flow is used to monitor the frequency of oscillation of the free layer magnetization.
摘要翻译：热电偶自旋转矩振荡器（STO）单独使用热流引起自旋转矩（ST）效应，并产生自由层磁化的持续振荡。除了常规的自由和参考层之外，热电偶STO还包括具有固定的平面内磁化的磁性氧化物层，在磁性氧化物层的一个表面上的强磁性金属层，在自由层和自由层之间的非磁性导电层所述金属层和所述磁性氧化物层的另一个表面上的电阻加热器。由于热电偶效应，从氧化物层通过金属层，导电层和自由层的热流最终导致自由层的自旋转移扭矩（STT）。与热流相反的方向流动的电感电流用于监测自由层磁化的振荡频率。

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