A programmable Hall sensor for camshaft applications

A chopped Hall sensor for camshaft applications is presented which provides a programmable "true power-on" switching level. The proposed chopping technique and self-compensation methods for temperature drift and technology spread provide a correct output state immediately after power-on ev...

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Bibliographic Details
Main Authors: Motz, M., Draxelmayr, D., Werth, T., Katzmaier, E.
Format: Conference Proceeding
Language:English
Subjects:
Calibration
Camshafts
Communication, education, history, and philosophy
Exact sciences and technology
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Magnetic sensors
Magnetic switching
Physics
Physics literature and publications
Protection
Robustness
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
Teeth
Temperature sensors
Voltage
Wheels
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Summary:A chopped Hall sensor for camshaft applications is presented which provides a programmable "true power-on" switching level. The proposed chopping technique and self-compensation methods for temperature drift and technology spread provide a correct output state immediately after power-on even at zero speed of the target wheel. An end-of-line calibration for the customer is implemented using surface micromachined cavity fuses. A novel combination of chopping and enhanced self-calibration algorithm adjusts the magnetic switching point and improves phase accuracy.
DOI:10.1109/ICSENS.2004.1426456