Adaptive Comparator Timeout for Unstable Comparison Time
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Solution Overview
Problem
The comparison time in existing comparison circuits is not stable due to factors like temperature, manufacturing process, and voltage variations, affecting efficiency.
Innovation Solution
A comparison circuit with an adaptive comparison mechanism, comprising a comparator, a comparison determining circuit, a time accumulating circuit, and a determining circuit, which accumulates time and sets a threshold to generate a predetermined comparison result when the accumulated time exceeds the threshold, preventing instability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the comparison circuit operates without adaptive mechanism, then the circuit structure remains simple, but the comparison time becomes unstable due to temperature, manufacturing process and voltage variations
Solution Approach 1:
The patent implements feedback by accumulating comparison time data from previous operations and using this accumulated information to dynamically adjust the comparison timeout threshold. The determining circuit receives the accumulated comparison time and generates an adaptive timeout value, creating a closed-loop system that continuously optimizes performance based on actual operating conditions, thereby resolving the contradiction between reliability and complexity.
Solution Approach 2:
The patent applies preliminary action by performing statistics and accumulation on comparison time during idle periods or between comparison operations. The time accumulating circuit continuously gathers comparison time data, and the determining circuit pre-calculates the adaptive timeout threshold before it is needed, so that when a comparison operation occurs, the system can immediately apply the pre-computed adaptive value without adding computational delay.
2Productivity
If the comparison timeout is set too short, then the system efficiency improves by avoiding excessive waiting, but comparison results may be incorrectly generated when comparison time is naturally extended due to environmental factors
Solution Approach 1:
The patent implements dynamics by making the comparison timeout threshold adaptive rather than fixed. The timeout value dynamically adjusts based on accumulated comparison time data that reflects actual operating conditions such as temperature and voltage variations. This dynamic adjustment allows the system to extend timeout when conditions require longer comparison time while maintaining short timeout under optimal conditions, thus resolving the contradiction between efficiency and accuracy.
Solution Approach 2:
The patent applies parameter changes by modifying the timeout parameter based on statistical analysis of comparison time. The determining circuit changes the timeout parameter from a fixed value to an adaptive value derived from accumulated data, allowing the system to optimize the timeout parameter according to actual performance characteristics and environmental conditions, thereby balancing efficiency and reliability.
3Measurement precision
If the comparison circuit waits for complete comparison result, then accurate comparison is achieved, but system stability deteriorates when comparison time becomes excessively long due to environmental variations
Solution Approach 1:
The patent applies preliminary action by pre-establishing an adaptive timeout threshold based on accumulated comparison time statistics before the comparison operation completes. This pre-computed adaptive threshold allows the system to make informed decisions about when to terminate comparison, preventing excessive waiting that could compromise stability while maintaining accuracy within reasonable time limits.
Solution Approach 2:
The patent implements feedback by using accumulated comparison time data to continuously refine the adaptive timeout threshold. This feedback mechanism ensures that the timeout value reflects actual system performance and environmental conditions, allowing the system to maintain stability by terminating comparisons that exceed adaptive time limits while preserving accuracy for comparisons that complete within reasonable time.
Data Source
AI summary
The present invention discloses a comparison circuit having adaptive comparison mechanism is provided. A comparator is enabled by an enabling signal having an enabling state during a comparison stage to compare a first voltage and a second voltage to generate a comparison result. A comparison determining circuit sets a stage indication signal at an unfinished state and a finished state before and after the comparison result is generated. A time accumulating circuit starts to accumulate an accumulated time when the enabling signal is at the enabling state and stops accumulating when the stage indication signal is at the finished state to generate a comparison time. A determining circuit performs statistics on the comparison time to generate a predetermined threshold time and sets a predetermined comparison result as the comparison result under the condition that the comparison result is not generated and the accumulated time exceeds the predetermined threshold time.