共查询到20条相似文献，搜索用时 46 毫秒
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本文设计了一种宽空气间距齿轮转速传感器。所研制的齿轮转速传感器选用巨磁电阻作为敏感元件,外加永磁体提供偏置磁场,通过信号处理电路采集齿轮转动过程中所产生的磁场变化信号,经过信号处理实现齿轮转速的测量。所研制的齿轮转速传感器不仅具有频率性能好,灵敏度高,体积小等优点,测量间距可超过4mm,解决了传统转速传感器测量间距小的问题。 相似文献
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介绍一种新型地磁传感器,该传感器由单轴巨磁电阻传感器捷联构成。通过外加磁通聚集器和磁偏置技术改进GMR传感器的输出特性,使地磁场的大小位于传感器输出曲线的线性范围内。用ANSYS对永磁体的偏置磁场进行数值模拟,ANSYS能根据偏置磁场快速地确定出永磁体的相关参数。该传感器具有结构简单、灵敏度高等优点,可以较好应用于地磁场测量。 相似文献
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A quality indicator for thick-film resistors based on noise index and resistance measurements is proposed. As this correlates resistor transport and noise characteristics and has mobility dimensions, we titled it to be noise reduced mobility. The experimental results for thick-film resistors, realized using three different resistor compositions with sheet resistances of 1, 10 and 100 kΩ m/sqr show that layers with sheet resistance of 10 kΩ0.25>m/sqr have minimum value of noise reduced mobility in comparison with layers formed using resistor compositions with sheet resistances of 1 and 100 kΩ m/sqr. The potential and resistance distributions measured along test resistors show that the noise reduced mobility is in correlation with thick-film inhomogeneity. 相似文献
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Electrical transport properties in nanostructure have experimentally and theoretically importance. The interest in such researches is stimulated by possible applications in microelectronic devises such as giant magnetoresistance (GMR) sensor and magnetic random access memory (MRAM). One interesting property of the electrical transport in magnetic multilayer composed of ferromagnetic separated by nonmagnetic layers is the spacer dependence of GMR oscillation, which is generally believed to … 相似文献
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Kai Schlage Lars Bocklage Denise Erb Jade Comfort Hans‐Christian Wille Ralf Röhlsberger 《Advanced functional materials》2016,26(41):7423-7430
Magnetoelectronic multilayer devices are widely used in today's information and sensor technology. Their functionality, however, is limited by the inherent properties of magnetic exchange or dipolar coupling which constrain possible spin configurations to collinear or perpendicular alignments of adjacent layers. Here, a deposition procedure is introduced that allows for a new class of layered materials in which complex spin structures can be accurately designed to result in a multitude of new and precisely adjustable spintronic and magnetoresistive properties. The magnetization direction and coercivity of each individual layer are determined by the deposition process in oblique incidence geometry and can be completely decoupled from neighboring layers. This applies for layers of any ferromagnetic material down to layer thicknesses of a few nm and lateral dimensions of a few 100 nm, enabling the design of efficient and compact magnetoelectronic devices, encompassing precision magnetoresistive sensors as well as layer systems with multiple addressable remanent states for magnetic memory applications. 相似文献
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A new circuit topology to convert grounded resistors to an equivalent floating resistor is presented and discussed. The value of the resulting floating resistor equals the sum of the two grounded resistors. The new topology can be used to convert either passive, active grounded resistors or active grounded conductances. The new topology is used in the design of a current controlled very high value floating resistor in the range of GΩ. This was achieved by utilising the output conductance of two matched transistors operating in the subthreshold region and biased using a 500 nA current. The practicality of the new topology is demonstrated through the design of a very low frequency bandpass filter for artificial insect vision and pacemaker applications. Simulations results using Level 49 model parameters in HSPICE show an introduced total harmonic distortion of less than 0.25% for a 1 Vpp input signal in a 3.3 V 0.25 μm CMOS technology. Statistical modelling of the new topology is also presented and discussed. 相似文献
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An integrated circuit set point temperature controller has an open collector output which switches low at a temperature determined by an external resistor. The programming resistor may be determined from a universal formula relating resistance to desired trip temperature. The circuit is laser trimmed at a single temperature in manufacture to conform with the formula to better than 1°C over a range between -40°C and 150°C. The circuit is low cost and includes temperature hysteresis, for well defined switching, and an optional output pull-up resistor 相似文献