发明授权
- 专利标题: Magnetic field sensors and related techniques that can provide a self-test using signals and related thresholds
- 专利标题(中): 磁场传感器和相关技术可以使用信号和相关阈值进行自检
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申请号: US13526113申请日: 2012-06-18
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公开(公告)号: US08860404B2公开(公告)日: 2014-10-14
- 发明人: Daniel S. Dwyer , Christine Graham , P. Karl Scheller
- 申请人: Daniel S. Dwyer , Christine Graham , P. Karl Scheller
- 申请人地址: US MA Worcester
- 专利权人: Allegro Microsystems, LLC
- 当前专利权人: Allegro Microsystems, LLC
- 当前专利权人地址: US MA Worcester
- 代理机构: Daly, Crowley, Mofford & Durkee, LLP
- 主分类号: G01B7/30
- IPC分类号: G01B7/30
摘要:
Magnetic field sensor and related techniques can identify passing conditions, failing conditions, and marginal conditions of a sensed object. The magnetic field sensor and techniques can use one or more peak values of a proximity signal representative of proximity of the sensed object, can generate one or more difference values representative of difference between the peak values of the proximity signal and threshold values of a threshold signal proportional to the peak values, can categorize the one or more difference values into a plurality of potential categories, wherein at least one of the plurality of potential categories is representative of a respective passing self-test and wherein another at least one of the plurality of potential categories is representative of a respective marginally passing self-test, can assign category values to the plurality of potential categories, and can communicate at least one of the plurality of category values.