Sensor self-diagnostics using multiple signal paths

摘要

Embodiments relate to systems and methods for sensor self-diagnostics using multiple signal paths. In an embodiment, the sensors are magnetic field sensors, and the systems and/or methods are configured to meet or exceed relevant safety or other industry standards, such as SIL standards. For example, a monolithic integrated circuit sensor system implemented on a single semiconductor ship can include a first sensor device having a first signal path for a first sensor signal on a semiconductor chip; and a second sensor device having a second signal path for a second sensor signal on the semiconductor chip, the second signal path distinct from the first signal path, wherein a comparison of the first signal path signal and the second signal path signal provides a sensor system self-test.

主权项

1. A monolithic integrated circuit comprising:
a first sensor device configured to indicate a physical quantity, the first sensor device having a first signal path for a first sensor signal on a semiconductor chip; and a second sensor device configured to indicate the physical quantity, the second sensor device having a second signal path for a second sensor signal on the semiconductor chip, the second signal path separate and distinct from the first signal path and, when compared with the first signal path, having at least one characteristic selected from the group consisting of being slower, being less precise, having more noise and having a different working principle, wherein a first output signal related to the first signal path and a second output signal related to the second signal path are communicable from the monolithic integrated circuit to an external control unit.