Galvanic Isolator Pulse Data Reconstruction
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Solution Overview
Problem
Communication between galvanically isolated systems in different voltage domains often suffers from latency and noise-induced errors, leading to imprecise operations.
Innovation Solution
A method and system that utilize a series of pulses transmitted across an isolation barrier, where a detector frames the received pulses within a oneshot interval, and a controller reconstructs the data, incorporating clock error correction to improve noise immunity and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pulse transmission is used across isolation barrier, then noise immunity is improved, but latency increases
Solution Approach 1:
The transmitted signal is segmented into individual pulses representing data bits. Each pulse is independently detected and accumulated during a defined one-shot interval, allowing robust noise immunity through pulse counting while maintaining timing precision through interval constraints.
Solution Approach 2:
The system employs periodic pulse transmission within defined one-shot intervals. The receiver accumulates pulses during each interval and reconstructs data based on pulse counts, creating a rhythmic communication pattern that balances noise rejection with timing efficiency.
2Stability of the object's composition
If clock signal transmission is used for synchronization, then operational synchronization is improved, but noise-induced errors increase
Solution Approach 1:
The receiver uses accumulated pulse counts from one-shot intervals to validate and correct clock signal timing. By comparing expected pulse counts with actual counts, the system detects and corrects clock errors, providing feedback-based synchronization that is resilient to noise.
Solution Approach 2:
The system preliminarily establishes timing expectations based on the transmitted clock signal before actual data transmission occurs. This preliminary timing framework allows the receiver to anticipate pulse arrival patterns and detect deviations caused by noise or clock errors.
Data Source
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Figure 3(a)~3(b)
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AI summary
Embodiments of the present invention may provide a system with a first and second circuit system separated by an electrical isolation barrier but provided in communication by at least one isolator device that bridges the isolation barrier. The first circuit system may include a communication system to transmit data across a common isolator device as a series of pulses, and the second circuit system may receive the series of pulses corresponding to the data. The second circuit system may include a detector coupled to the common isolator device to detect the received pulses, a oneshot to frame the received pulse(s), and a controller to reconstruct the data based on accumulated framed pulse(s). Therefore, noise induced spurious pulses outside the oneshot intervals may be ignored by the second circuit system providing improved noise immunity.