Adaptive FIFO Controller for Latency Reduction
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Solution Overview
Problem
Static FIFO settings based on worst-case design scenarios lead to increased latency in data communication between electronic devices with slightly varying clock signals, even if the variations are minimal.
Innovation Solution
A FIFO settings controller that dynamically adjusts FIFO settings based on the actual parts-per-million (PPM) difference between the transmission and reception frequencies, reducing latency by optimizing start read, full, and empty threshold settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static FIFO settings are used based on worst-case design scenarios, then reliability is improved, but latency increases
Solution Approach 1:
The patent implements dynamic FIFO control by continuously monitoring the actual frequency difference between transmitting and receiving devices and adjusting FIFO settings in real-time based on measured conditions rather than relying on static worst-case assumptions
Solution Approach 2:
The system changes FIFO parameters (such as threshold settings and buffer sizes) dynamically based on the measured frequency offset, allowing the FIFO configuration to adapt to actual operating conditions and minimize latency while maintaining reliability
2Adaptability or versatility
If static FIFO settings are used based on design specifications, then adaptability is improved, but productivity deteriorates
Solution Approach 1:
The patent employs feedback mechanisms where the actual frequency difference is measured and used to adjust FIFO settings dynamically, creating a closed-loop system that continuously optimizes performance based on real-time conditions
Solution Approach 2:
The system performs self-adjustment by automatically measuring frequency offsets and modifying its own FIFO configuration without external intervention, enabling it to self-optimize for different operating conditions
Data Source
AI summary
A control system controls First-In First-Out (FIFO) settings of a receiving system. The control system includes a FIFO settings controller that receives a first signal indicative of a first frequency of data received by the receiving system. The FIFO settings controller receives a second signal indicative of a second frequency of a clock that reads the data received by the receiving system. The FIFO settings controller determines a difference (e.g., a parts-per-million (PPM) difference) between the first frequency and the second frequency. The FIFO settings controller sends a third signal indicative of instructions to adjust FIFO configuration settings based on the PPM difference.