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公开(公告)号：US08933750B2
公开(公告)日：2015-01-13
申请号：US13769156
申请日：2013-02-15
发明人： Bertrand F. Cambou , Douglas J. Lee , Ken Mackay
摘要： An apparatus includes a circuit and a field line. The circuit includes a magnetic tunnel junction including a storage layer and a sense layer. The field line is configured to generate a magnetic field based on an input signal, where the magnetic tunnel junction is configured such that a magnetization direction of the sense layer and a resistance of the magnetic tunnel junction vary based on the magnetic field. The circuit is configured to amplify the input signal to generate an output signal that varies in response to the resistance of the magnetic tunnel junction.
摘要翻译： 一种装置包括电路和场线。 该电路包括一个包括存储层和感应层的磁性隧道结。 场线被配置为基于输入信号产生磁场，其中磁性隧道结被配置为使得感测层的磁化方向和磁性隧道结的电阻基于磁场而变化。 电路被配置为放大输入信号以产生响应于磁性隧道结的电阻而变化的输出信号。
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92.发明授权公开(公告)号：US07626452B2
公开(公告)日：2009-12-01
申请号：US11383219
申请日：2006-05-15
申请人： Kun-Min Chen , Shen-Min Lo , Ching-Sheng Li , Chen-Yu Yuan
发明人： Kun-Min Chen , Shen-Min Lo , Ching-Sheng Li , Chen-Yu Yuan
IPC分类号： H03F15/00
CPC分类号： H02P7/04 , H02M2001/0009
摘要： A driving circuit includes a power supply, an input capacitor, a Hall sensor, a first amplifier, a second amplifier, a full-bridge driver circuit, and a first operational amplifier. The input capacitor is coupled to the power supply. The input end of the first amplifier and the second amplifier is coupled to the output end of the Hall sensor. The control end of the full-bridge driver circuit is coupled to the output end of the first amplifier and the output end of the second amplifier. The first operational amplifier includes a first input end for receiving a first reference voltage and a second input end coupled to the first output end of the full-bridge driver circuit.
摘要翻译： 驱动电路包括电源，输入电容器，霍尔传感器，第一放大器，第二放大器，全桥驱动器电路和第一运算放大器。 输入电容器耦合到电源。 第一放大器和第二放大器的输入端耦合到霍尔传感器的输出端。 全桥驱动电路的控制端耦合到第一放大器的输出端和第二放大器的输出端。 第一运算放大器包括用于接收第一参考电压的第一输入端和耦合到全桥驱动器电路的第一输出端的第二输入端。
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93.发明申请公开(公告)号：US20060261889A1
公开(公告)日：2006-11-23
申请号：US11437316
申请日：2006-05-18
申请人： Roberto Giovannotto
发明人： Roberto Giovannotto
IPC分类号： H03F15/00
CPC分类号： H03F1/565 , H03F3/181 , H03F2200/03 , H03F2200/541
摘要： A system and method for employing variable magnetic flux bias in an amplifier. The amplifier system comprises an output transformer and a magnetic sensor configured to sense a first magnetic flux of the output transformer. The magnetic sensor generates a flux signal responsive to the first magnetic flux. Control circuitry is configured to receive the flux signal and to generate a control signal responsive to the flux signal. A winding is configured to receive the control signal and to induce a second magnetic flux within the output transformer responsive to the control signal, the second magnetic flux having opposite polarity to the first magnetic flux. The second magnetic flux may maintain a non-zero quiescent magnetic bias level within the output transformer, or may substantially cancel or null the DC and low-frequency subsonic components of the first magnetic flux.
摘要翻译： 一种用于在放大器中采用可变磁通量偏置的系统和方法。 放大器系统包括输出变压器和被配置为感测输出变压器的第一磁通量的磁传感器。 磁传感器响应于第一磁通量产生通量信号。 控制电路被配置为接收通量信号并响应于通量信号产生控制信号。 绕组被配置为接收控制信号并且响应于控制信号而在输出变压器内引起第二磁通量，第二磁通量具有与第一磁通量相反的极性。 第二磁通量可以在输出变压器内保持非零静态磁偏置电平，或者可以基本上消除或消除第一磁通的DC和低频亚音速分量。
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公开(公告)号：US06859063B2
公开(公告)日：2005-02-22
申请号：US10411073
申请日：2003-04-09
申请人： Stephen J. Nuspl , Edward Wuori , E. James Torok
发明人： Stephen J. Nuspl , Edward Wuori , E. James Torok
CPC分类号： H04L25/0292 , H03F15/00 , H04L25/0272 , H04L25/0278 , H04L25/028
摘要： Transceiver components for a transmission line are described. A driver includes a first network of thin-film elements exhibiting giant magnetoresistance, and a first input conductor inductively coupled to at least one of the thin-film elements in the first network. At least one dimension of each thin-film element in the first network is configured with reference to the characteristic impedance of the transmission line. A receiver includes a second network of thin-film elements exhibiting giant magnetoresistance, and a second input conductor inductively coupled to at least one of the thin-film elements in the second network. A termination impedance in series with the second input conductor has a value relating to the characteristic impedance of the transmission line.
摘要翻译： 描述传输线的收发器组件。 驱动器包括具有巨磁电阻的薄膜元件的第一网络和感应耦合到第一网络中的至少一个薄膜元件的第一输入导体。 第一网络中的每个薄膜元件的至少一个尺寸参考传输线的特性阻抗来配置。 接收机包括呈现巨磁电阻的薄膜元件的第二网络，以及感应耦合到第二网络中的至少一个薄膜元件的第二输入导体。 与第二输入导体串联的终端阻抗具有与传输线的特性阻抗有关的值。
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95.发明授权Magnetoresistance effect device and magnetoresistance effect type head, memory device, and amplifying device using the same 失效磁阻效应器件和磁阻效应型头，存储器件和使用其的放大器件
公开(公告)号：US5841611A
公开(公告)日：1998-11-24
申请号：US429714
申请日：1995-04-27
IPC分类号： G01R33/09 , G06K19/06 , G11B5/39 , G11C11/14 , G11C11/15 , G11C11/16 , G11C11/56 , H01F10/08 , H01F10/12 , H01F10/13 , H01F10/14 , H01F10/16 , H01F10/32 , H01L21/8246 , H01L27/105 , H01L27/22 , H01L43/08 , H01L43/10 , H03F7/02 , H03F15/00 , G11B5/127
CPC分类号： H03F7/02 , B82Y10/00 , B82Y25/00 , G01R33/093 , G11B5/3903 , G11C11/15 , G11C11/16 , G11C11/5607 , H01F10/3281 , H01L27/222 , H01L43/10 , G11B2005/3996 , G11B5/3925 , G11C2211/5616
摘要： A magnetoresistance effect device of the invention includes: a substrate; and a multilayer structure formed on the substrate. The multilayer structure includes a hard magnetic film, a soft magnetic film, and a non-magnetic metal film for separating the hard magnetic film from the soft magnetic film. The magnetization curve of the hard magnetic film has a good square feature, and the direction of a magnetization easy axis of the hard magnetic film substantially agrees to the direction of a magnetic field to be detected.
摘要翻译： 本发明的磁阻效应器件包括：衬底; 以及形成在基板上的多层结构。 多层结构包括硬磁膜，软磁膜和用于从硬磁膜分离硬磁膜的非磁性金属膜。 硬磁性膜的磁化曲线具有良好的正方形特征，硬磁性膜的磁化容易轴的方向基本上与要检测的磁场的方向一致。
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公开(公告)号：US5334944A
公开(公告)日：1994-08-02
申请号：US168399
申请日：1993-12-17
申请人： Noriyuki Hirakata
发明人： Noriyuki Hirakata
CPC分类号： H03F3/45968 , H03F3/45479 , H03F3/45775 , H03F2200/81
摘要： A differential amplifier circuit suitable for amplifying a faint signal, such as the output of a magnetic sensor including a Hall element. The differential amplifier circuit includes switching units which are provided at the input and output terminals of a differential amplifier to switch the polarity of the input and output signals, and low pass filters which are provided at the output terminals to remove the switching frequency component from the output signal, thus working as an ideal amplifier with no offset voltage. Furthermore, by alternating the polarity of driving current of the Hall element for inverting the polarity of the input signal of the differential amplifier, an error voltage of the Hall element caused by location error of the output electrodes and the voltage drop across them can be eliminated at the same time.
摘要翻译： 一种适用于放大微弱信号的差分放大电路，例如包括霍尔元件的磁传感器的输出。 差分放大电路包括设置在差分放大器的输入和输出端的开关单元，用于切换输入和输出信号的极性，以及设置在输出端的低通滤波器，以从开关频率分量 输出信号，从而作为无偏移电压的理想放大器。 此外，通过交替霍尔元件的驱动电流的极性以反转差分放大器的输入信号的极性，可以消除由输出电极的位置误差引起的霍尔元件的误差电压和它们两端的电压降 与此同时。
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97.发明授权
公开(公告)号：US4709214A
公开(公告)日：1987-11-24
申请号：US856562
申请日：2986-04-28
申请人： Jacob K. Higgs
发明人： Jacob K. Higgs
CPC分类号： H01L27/22
摘要： An integrated circuit includes an epitaxial layer. In a near central region thereof is formed a symmetrical array of four equal sized Hall cells that are connected in parallel to form one Hall element. A moat surrounds the Hall element consisting of two concentric isolation walls separated by a band of opposite conductivity epitaxial material. The output of the Hall element is connected to the input of an adjacent differential amplifier that has two extraordinarily large amplifying transistors with emitter areas each equal to about a half of a Hall area, for achieving much better control over the relative dimensions of these emitters and thus over the amplifier offset voltage from chip to chip. The emitter resistors are likewise made very wide and both pairs of components are physically arranged to have balanced thermal coupling to the Hall element for further enhancing control of offset voltage.
摘要翻译： 集成电路包括外延层。 在其近中心区域形成有四个相等大小的霍尔单元的对称阵列，这些霍尔单元并联连接以形成一个霍尔元件。 围绕霍尔元件的护城河由两相同的导电外延材料带隔开的同心隔离壁组成。 霍尔元件的输出连接到具有两个特别大的放大晶体管的相邻差分放大器的输入端，发射极区域各自等于霍尔区域的大约一半，以实现对这些发射极的相对尺寸的更好的控制， 从而使放大器的失调电压从芯片到芯片。 发射极电阻器同样制成非常宽，并且两对部件物理地布置成具有与霍尔元件的平衡热耦合，以进一步增强偏移电压的控制。
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公开(公告)号：US4616188A
公开(公告)日：1986-10-07
申请号：US746860
申请日：1985-06-20
申请人： Robert M. Stitt , Rodney T. Burt
发明人： Robert M. Stitt , Rodney T. Burt
CPC分类号： H03F15/00
摘要： An isolation amplifier circuit is described that utilizes a magnetic field in combination with a Hall effect device to isolate input signals and output signals. The input signal is applied to a conducting coil that produces a magnetic field in a Hall effect material through which current is flowing. Because of the Hall effect, terminals on the sides of the Hall effect material can provide a voltage difference. This voltage difference is amplified and applied to a second conducting coil. The second conducting coil is adapted to provide a magnetic field in the opposite direction from the magnetic field produced by the input signal. When the magnetic fields are identical, no difference in current flowing through the two terminals will be present. The output signal of the difference amplifier circuit will be a function of the input signal. According to a second embodiment, apparatus is included for cancelling ambient magnetic fields. A second isolation amplifier circuit is arranged to have a spatial orientation rotated 180.degree. from a first isolation amplifier. With this configuration, ambient magnetic fields will have cancelling effects. The Hall effect device can be implemented in a PNP transistor with a split collector. The isolation amplifier can be fabricated with monolithic technology.
摘要翻译： 描述了利用与霍尔效应装置组合的磁场来隔离输入信号和输出信号的隔离放大器电路。 输入信号被施加到在电流流过的霍尔效应材料中产生磁场的导电线圈。 由于霍尔效应，霍尔效应材料侧面的端子可以提供电压差。 该电压差被放大并施加到第二导电线圈。 第二导线线圈适于在与由输入信号产生的磁场相反的方向上提供磁场。 当磁场相同时，不存在流过两个端子的电流的差异。 差分放大器电路的输出信号将是输入信号的函数。 根据第二实施例，包括用于消除环境磁场的装置。 第二隔离放大器电路布置成具有从第一隔离放大器旋转180°的空间取向。 通过这种配置，环境磁场将具有消除效果。 霍尔效应器件可以在具有分离集电极的PNP晶体管中实现。 隔离放大器可以用单片技术制造。
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公开(公告)号：US4218659A
公开(公告)日：1980-08-19
申请号：US6912
申请日：1979-01-26
申请人： Takao Arai
发明人： Takao Arai
摘要： A Hall-effect element is connected at one Hall current terminal to ground and at the other Hall current terminal to a DC voltage application circuit. Two Hall voltage terminals of the Hall-effect element are coupled with the base and the emitter of a first transistor, respectively. A second transistor is connected in series to the first transistor in such a way that the collector of the second transistor is fed back in current mode to the emitter of the first transistor.
摘要翻译： 霍尔效应元件在一个霍尔电流端子处连接到地，另一个霍尔电流端子连接到直流电压施加电路。 霍尔效应元件的两个霍尔电压端子分别与第一晶体管的基极和发射极耦合。 第二晶体管与第一晶体管串联连接，使得第二晶体管的集电极以电流模式反馈到第一晶体管的发射极。
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100.发明授权
公开(公告)号：US3913027A
公开(公告)日：1975-10-14
申请号：US44108974
申请日：1974-02-11
申请人： IBM
发明人： ZAPPE HANS HELMUT
CPC分类号： H03F19/00 , Y10S505/855
摘要： A wide band linear amplifier comprising first and second heavily damped Josephson devices and associated superconducting circuitry. Each Josephson device has a parallel path with a load resistor connected thereto. The parallel path connected to the first Josephson device is positioned to operate as a control current path for the second Josephson device. Both Josephson devices are operated on linear portions of their respective gain curves. The output current through the second load resistance is a linear amplification of the input current; the latter being applied as control current to the first Josephson device.
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