A CMOS (Complementary metal-oxide-semiconductor) Hall sensor with low power consumption and simple structure is introduced. The tiny magnetic signal from Hall device could be detected by a high-resolution delta-sigma ADC in presence of offset and flickering noise. Also, the offset as well as the flickering noise are effectively suppressed by the current spinning technique combined with double sampling switches of the ADC. The double sampling scheme of the ADC reduces the operating frequency and helps to reduce the power consumption. The prototype Hall sensor is fabricated in a 0.18-µm CMOS process, and the measurement shows detection range of ±150 mT and sensitivity of 110 µV/mT. The size of active area is 0.7 mm², and the total power consumption is 4.9 mW. The proposed system is advantageous not only for low power consumption, but also for small sensor size due to its simplicity.

中文翻译：

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基于低功耗CMOS的霍尔传感器，具有采用双采样Δ-ΣADC的简单结构。

介绍了一种低功耗，结构简单的CMOS（互补金属氧化物半导体）霍尔传感器。在存在失调和闪烁噪声的情况下，高分辨率Δ-ΣADC可以检测到来自霍尔器件的微小磁信号。此外，通过电流自旋技术结合ADC的双采样开关，可以有效地抑制偏移以及闪烁噪声。ADC的双采样方案降低了工作频率，并有助于降低功耗。原型霍尔传感器采用0.18 µm CMOS工艺制造，测量结果显示检测范围为±150 mT，灵敏度为110 µV / mT。活动区域的大小为0.7 mm ²，总功耗为4.9 mW。所提出的系统由于其简单性，不仅对于低功耗是有利的，而且对于小的传感器尺寸也是有利的。