A compact CMOS magnetic Hall sensor that includes both a Hall plate and readout circuit is proposed. In order to achieve a low-noise and low-power operation, the sensor employs a switched biasing amplifier with a chopper. The prototype has been implemented and fabricated in a high-voltage 0.18 CMOS process and occupies 0.624 mm2. Owing to the switched biasing amplifier, the input-referred noise is reduced from 41 μT√Hz to 25 μT/ √Hz. The entire sensor consumes 4.5 mW with a 3.3 V supply voltage.
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机译：提出了一种既包含霍尔板又包含读出电路的紧凑型CMOS磁性霍尔传感器。为了实现低噪声和低功率工作，该传感器采用了带有斩波器的开关偏置放大器。该原型已通过高压0.18 CMOS工艺实施和制造，占地0.624 mm 2 。由于采用了偏置开关放大器，因此将参考输入噪声从41μT√Hz降低至25μT/√Hz。整个传感器在3.3 V电源电压下的功耗为4.5 mW。
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