Bipolar magnetotransistor sensor with digital output

摘要

The reported CMOS microsystem with digital output is a key element for accurate magnetic measurements. The integrated system includes a magnetic microsensor - double-collector lateral bipolar magne-totransistor and signal conditioning CMOS circuitry. The imbalance in collector currents is compensated by the change of resistance of collector load in the control circuit of an "И-ladder". The chip is fabricated in a generic 2-μm CMOS process and covers an area of 2.6 × 3.2 mm~2.