Optical Transmitter Control via Receiver-Side Hardware Feedback
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Solution Overview
Problem
Existing optical sensor systems face challenges in ensuring compliance with predefined performance specifications, particularly in high-frequency applications where optical pulse counting becomes impractical and costly, and firmware errors can lead to delays and non-compliance with operating current limits.
Innovation Solution
The system employs an optical receiver controller to provide parameters and control signals for an optical transmitter, allowing independent hardware-based compliance with performance specifications, such as overcurrent protection limits, and enables operation with a wider range of parameter sets, avoiding firmware-related issues by using hardware control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical pulse counting is used to ensure compliance with performance specifications, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces the mechanical/electronic optical pulse counting system with a hardware-based current monitoring system. A current sensor directly measures the optical transmitter's current consumption and compares it against predefined thresholds, eliminating the need for complex pulse counting circuitry while maintaining compliance monitoring accuracy.
Solution Approach 2:
The patent introduces a hardware intermediary component (current sensor and comparison circuit) that directly monitors transmitter current and provides immediate feedback. This intermediary enables compliance monitoring without requiring firmware intervention or complex processing, reducing overall system complexity.
2Ease of operation
If firmware-based control is used to manage optical transmitter operation, then ease of operation is improved, but reliability deteriorates due to firmware errors and delays
Solution Approach 1:
The patent implements a hardware feedback loop where the current sensor continuously monitors transmitter current and immediately compares it against thresholds. When compliance is violated, the hardware circuit directly interrupts or adjusts the transmitter operation without requiring firmware processing, eliminating delays and firmware errors while maintaining ease of operation through automatic control.
Solution Approach 2:
The hardware monitoring system is self-regulating, automatically detecting current violations and triggering protective actions without external firmware intervention. The system serves itself by having the current sensor directly control the compliance status, eliminating reliance on firmware correctness and improving reliability.
3Reliability
If hardware-based control is used for optical transmitter parameters, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent monitors a single critical parameter (current consumption) rather than multiple parameters, simplifying the hardware complexity. By focusing on the most important compliance parameter and using simple comparison logic against predefined thresholds, the system achieves high reliability without adding significant hardware complexity.
Solution Approach 2:
The patent separates the compliance monitoring function into a dedicated, simple hardware module independent of the main control system. This segmentation allows the monitoring function to be implemented with minimal hardware while maintaining reliability, as it does not burden the main controller with additional complexity.
4Measurement precision
If optical pulse counting is implemented, then measurement precision is improved, but productivity decreases due to processing overhead
Solution Approach 1:
The patent replaces the computationally intensive optical pulse counting mechanism with a simple hardware current measurement and comparison system. The current sensor continuously measures transmitter current and compares it against thresholds using basic analog or digital logic, eliminating the need for firmware processing and maintaining precise compliance detection without processing overhead.
Data Source
AI summary
An electronic device includes an optical transmitter, an optical receiver, a memory, an optical transmitter controller, and an optical receiver controller. The memory is configured to store an indicator of a next pulse repetition interval (PRI) and a set of parameters associated with operating the optical transmitter in accordance with the next PRI. The optical transmitter controller is configured to retrieve the indicator of the next PRI in response to a trigger signal; retrieve, using the indicator of the next PRI, the set of parameters; and operate the optical transmitter in accordance with the set of parameters. The optical receiver controller is configured to operate the optical receiver; update the indicator of the next PRI stored in the memory; and provide the trigger signal to the optical transmitter controller.