This work explores the performance characteristics of anisotropic magnetoresistance (AMR) sensors when operating with very short set/reset current polarization pulses. AMR sensor’s sensitivity, offset, and power consumption are measured and reported using the sequences of set/reset polarization pulses of different durations. In order to perform these measurements, a circuit topology for generating agile current pulses with variable duration down to 40 ns, i.e., about fifty times shorter than similar circuits reported in the literature, was devised. It is demonstrated that AMR sensors maintain their sensitivity and offset even with polarization pulses two orders of magnitude shorter than those recommended in the literature. This allows for the faster magnetic field sampling and the lower power consumption which can significantly broaden the application space of AMR sensors.

中文翻译：

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使用灵活的高速置位-复位脉冲发生电路探索 AMR 传感器的性能限制

这项工作探索了各向异性磁阻 (AMR) 传感器在使用非常短的设置/复位电流极化脉冲操作时的性能特征。使用不同持续时间的设置/重置极化脉冲序列测量和报告 AMR 传感器的灵敏度、偏移和功耗。为了执行这些测量，设计了一种电路拓扑结构，用于生成具有低至 40 ns 的可变持续时间的灵活电流脉冲，即比文献中报道的类似电路短约 50 倍。事实证明，即使极化脉冲比文献中推荐的短两个数量级，AMR 传感器也能保持其灵敏度和偏移。