Sensor IC Compensation Parameter Storage and Authentication
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Solution Overview
Problem
Sensor integrated circuits (ICs) face challenges in reducing cross-dependencies on non-target physical properties, requiring digital compensation, and need to meet safety requirements while minimizing cost, size, and complexity, as well as authenticating genuine ICs to prevent failures in automotive applications.
Innovation Solution
Storing compensation parameters on a controller associated with the sensor system rather than the IC itself, allowing the controller to perform measurement and safety result compensation using raw data from the IC, and using physical unclonable function (PUF) parameters for authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If compensation parameters are stored on the sensor IC, then measurement compensation can be performed, but the cost, size, and complexity of the IC increase
Solution Approach 1:
The patent extracts the compensation parameters from the sensor IC and stores them in external memory or a controller. This separation allows the IC to remain simple while still enabling accurate measurement compensation through the external storage of calibration data, directly resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The patent introduces an intermediary storage location (external memory or controller) to hold the compensation parameters. This intermediary allows the sensor IC to perform measurements without incorporating complex compensation logic internally, thus maintaining IC simplicity while achieving precise measurement through external parameter storage
2Reliability
If digital compensation is implemented, then cross-dependency on non-target physical properties is reduced, but the device complexity increases
Solution Approach 1:
The patent extracts the compensation processing function from the sensor IC and places it in an external controller or processor. This allows digital compensation to reduce cross-dependency on non-target physical properties while keeping the IC itself simple, as the complex compensation algorithms are executed externally rather than within the IC
3Reliability
If sensor IC is used in automotive applications, then safety requirements must be met, but the cost and complexity increase
Solution Approach 1:
The patent extracts safety-related compensation parameters and authentication mechanisms from the IC and places them in external storage or controllers. This allows automotive applications to meet safety requirements through external verification and calibration while keeping the IC design simple and cost-effective
Data Source
AI summary
A device may determine a sensor identifier corresponding to a sensor integrated circuit (IC) associated with a sensor system. The device may provide the sensor identifier corresponding to the sensor IC. The device may receive, based on providing the sensor identifier, compensation parameter information associated with the sensor IC. The device may cause a set of compensation parameters, associated with the compensation parameter information, to be stored on a controller associated with the sensor system. The set of compensation parameters may include one or more parameters associated with correcting a measurement performed by the sensor IC or a safety result provided by the sensor IC.