Three-Line Receiver Delay Alignment for High-Speed Signal Skew
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Solution Overview
Problem
Current communication systems face challenges in enhancing communication performance due to signal skew issues, particularly in high-speed interfaces used in electronic devices with increasing functionality, where existing methods for adjusting skew are inadequate.
Innovation Solution
The implementation of a communication system with a receiver and transmitter that utilize multiple signal lines and delay adjustment circuits to adjust the delay amounts of signals, allowing for precise skew adjustment through synchronization codes and phase comparison, enabling effective communication performance enhancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-speed interface is used to transmit data at several Gbps, then data transmission speed is improved, but signal skew between differential signals increases
Solution Approach 1:
The patent applies preliminary action by adjusting the delay amount of at least one signal in advance before data transmission occurs. The delay adjustment circuit pre-compensates for skew between differential signals by introducing controlled delays to signals that would otherwise arrive at different times at the receiver, ensuring proper synchronization is established before high-speed communication begins
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the delay amount parameter of signals to compensate for skew. The delay adjustment circuit modifies the time delay parameter of at least one differential signal based on detected skew conditions, changing the temporal parameter to achieve proper signal alignment and maintain reliable high-speed communication
2Reliability
If skew adjusting circuit is implemented to adjust skew between differential data signal and clock signal, then communication performance is improved, but device complexity increases
Solution Approach 1:
The patent applies merging by integrating the delay adjustment circuit directly into the transmitting device, combining the skew compensation function with the existing signal transmission path. This integration approach allows skew adjustment to be performed within the existing circuit architecture rather than adding separate, complex adjustment mechanisms, thereby improving communication performance while minimizing increases in overall device complexity
Solution Approach 2:
The patent applies self-service by enabling the transmitting device to automatically detect and adjust signal skew without requiring external intervention or complex calibration procedures. The delay adjustment circuit autonomously compensates for skew between differential signals by internally adjusting delay amounts based on signal characteristics, allowing the system to self-correct timing issues and maintain optimal communication performance
Data Source
AI summary
A receiver includes a first receiving circuit that receives a first data including a first symbol transmitted using three signals over a first data lane, the first data lane including three signal lines respectively corresponding to the three signals. The first receiving circuit includes a delay adjustment circuit configured to adjust a delay amount of at least one of the three signals.