Parallel Position Sensing With Feedback Weighting for Low-Noise Tracking
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Solution Overview
Problem
Existing position sensing devices face limitations in speed and signal-to-noise ratio, particularly when measuring angular positions, as they often rely on sequential scanning of sensing elements, which results in higher latency and noise sensitivity.
Innovation Solution
A position sensing device that combines multiple sensing signals in parallel using a combiner circuit with weight factors, a processing block with loop filters, and a feedback loop to adjust these weights, allowing for reduced latency and improved noise performance by averaging noise contributions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sequential scanning of sensing elements is used, then device complexity is reduced, but measurement precision and signal-to-noise ratio deteriorate
Solution Approach 1:
The patent combines multiple sensing elements into a single integrated sensor array that processes multiple position measurements simultaneously. The sensing device integrates several sensing elements that generate sense signals in parallel, which are then combined through a combiner circuit to produce a composite signal with improved signal-to-noise ratio. This merging approach maintains relatively simple device complexity while achieving superior measurement precision through signal integration.
2Device complexity
If sequential scanning of sensing elements is used, then device complexity is reduced, but productivity deteriorates
Solution Approach 1:
The patent implements continuous parallel processing of position measurements by maintaining all sensing elements active simultaneously rather than scanning them sequentially. The sensing device continuously generates and processes sense signals from multiple sensing elements in parallel, eliminating the time delays inherent in sequential scanning. This enables real-time position tracking with reduced latency and improved productivity while keeping device complexity manageable through efficient signal processing architecture.
3Productivity
If parallel processing of multiple sensing signals is used, then productivity and measurement precision are improved, but device complexity increases
Solution Approach 1:
The patent employs a multi-functional combiner circuit that performs multiple operations simultaneously: it combines sense signals from multiple sensing elements, applies weight factors for optimization, generates error signals, and produces composite signals all through a single integrated circuit. This universal circuit design handles various signal processing tasks within one component, enabling parallel processing of multiple sensing signals with improved productivity and measurement precision while minimizing the increase in device complexity through functional integration.
Data Source
AI summary
A position sensing device for measuring a position, comprises a position sensing device for measuring a position; a plurality of sensors arranged to produce sense signals each being a function of an input phase representative of a position to be measured; a combiner circuit arranged to generate an error signal by combining the sense signals according to an array of weight factors; a processing block including a loop filter to filter the error signal and arranged to output a phase value representative of the position; and a feedback loop comprising a feedback signal unit arranged for receiving the output phase value and for adjusting based on the received output phase value of the array of weight factors.