The hall sensor os a device whose output voltage changes according to the strength of a magnetic field and is widely used in various fields such as automobiles, home appliances, and medical devices. The hall sensor consist of hall plate for converting magnetic fields into electrical signals and analog and digital signal processing units for processing them. Among them, a key function of the analog signal processing part of the hall sensor is to remove the offset generated in tha hall plate, and it is generally removed by applying a spinning-current technique. However, since the spinning-current technique uses many switches, switching noise and harmonics are generated, and the complexity of the signal processor increases the size of the hall sensor. Therefor, this paper proposes the inductor stacked hall plate to cancellation the offset of the hall plate. The proposed hall plate compensate the offset by stacking an inductor on the hall plate to generated a reverse magnetic field. Since the offset is cancellated without any additional circuit, the configuration of hall sensor is simplified, and noise caused by the switch is not generated. The proposed spiral inductor stacked hall plate is fabricated through CMOS 180nm process and it is confirmed that the offset can be removed by generating a reverse magnetic field through the spiral inductor.
목차
Abstract I. 서론 II. 본론 1. 홀 플레이트와 오프셋 2. 기존의 오프셋 제거 기법 3. 적충형 인덕터를 통한 오프셋 제거 기법 III. 결론 감사의 글 참고문헌
키워드
CMOS hall sensoroffset cancellationstacked inductor