Signal Skew Compensation Circuit With Dynamic Delay Adjustment
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Solution Overview
Problem
Existing signal skew compensation methods in data communication require CPU resources for calculations and have fixed, non-adjustable compensation amounts, leading to potential data acquisition failures in varying signal quality conditions.
Innovation Solution
A signal skew compensation apparatus and method that dynamically adjusts delay based on clock frequency and parsing results, using a clock detection module, DELAY module, and data parsing control module to ensure accurate data capture across varying signal qualities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CPU is used to calculate signal skew degree, then compensation accuracy is improved, but CPU computing resources are consumed
Solution Approach 1:
The patent replaces CPU-based software calculation with a hardware skew compensation circuit that uses delay units and control logic to automatically compensate for signal skew. The hardware circuit directly generates delayed signals based on detected skew conditions, eliminating the need for CPU intervention and computing resources while maintaining compensation accuracy.
Solution Approach 2:
The skew compensation circuit operates autonomously by detecting signal skew conditions and automatically adjusting delay amounts through hardware logic. The system monitors its own performance and self-regulates the compensation without external CPU control, achieving both accuracy and resource efficiency.
2Device complexity
If fixed delay units are used, then device complexity is reduced, but adaptability to varying signal quality is worsened
Solution Approach 1:
The patent implements a dynamic skew compensation mechanism where the delay amount is not fixed but can be adjusted based on detected signal conditions. The control circuit varies the delay units activation based on real-time skew detection, allowing the system to adapt to different signal qualities and compensation requirements while maintaining a relatively simple hardware structure.
Solution Approach 2:
The system changes the delay parameter dynamically by selecting different numbers of delay units to activate based on the detected skew condition. This parameter adjustment allows the same hardware circuit to handle varying signal quality scenarios without requiring multiple fixed circuits, maintaining simplicity while achieving adaptability.
3Adaptability or versatility
If maximum delay is applied, then compensation range is improved, but data acquisition reliability is worsened due to fixed non-adjustable delay
Solution Approach 1:
The patent incorporates a feedback mechanism where the system continuously monitors signal quality and skew conditions, then adjusts the delay amount accordingly. This closed-loop control ensures that the optimal delay is applied at all times, improving both compensation range coverage and data acquisition reliability by avoiding excessive or insufficient delay in different operating conditions.
Data Source
AI summary
The invention discloses a signal skew compensation apparatus and method. The signal skew compensation apparatus comprises: a clock detection module (1) for detecting a frequency output of an input clock signal; a DELAY module (2) for receiving a data signal and introducing a delay, a delay amount being controlled and delayed data being output based on the frequency detected by the clock detection module (1) and a DELAY value output by a data parsing control module (3); and the data parsing control module (3) for receiving the delayed data and parsing a PING message therein, and adjusting the output DELAY value based on a parsing result. The invention has the advantages of simple implementation, low cost, dynamically adjustable signal skew compensation amount, and high flexibility, real-time performance and efficiency.