Three-Signal Receiver Delay Alignment for High-Speed Skew Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems face challenges in enhancing communication performance, particularly in high-speed interfaces where skew adjustment is crucial for optimal data transmission.
Innovation Solution
The proposed communication system includes a receiver and a transmitter equipped with multiple receiving and transmitting sections, respectively, which utilize delay sections and control sections to adjust skew by detecting patterns or phase information, thereby optimizing data lane alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-speed data transmission is implemented, then communication speed is improved, but skew between data signals and clock signals increases
Solution Approach 1:
The transmitter performs preliminary skew adjustment by adding delay to the clock signal before transmission. The delay amount is determined in advance based on channel characteristics, ensuring that the clock signal and data signal arrive at the receiver with proper alignment, thus preventing skew-related errors at high speeds
Solution Approach 2:
The receiver detects skew between the received data signal and clock signal, and feeds back skew adjustment information to the transmitter. The transmitter uses this feedback to adjust the delay amount of the clock signal, creating a closed-loop control system that maintains optimal signal alignment despite variations in transmission conditions
2Reliability
If skew adjustment circuits are added to improve signal alignment, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The skew adjustment circuit is integrated into the existing transmitter structure, sharing components with the data transmission path. The same delay elements and control mechanisms are used for both clock signal adjustment and data signal conditioning, reducing the need for separate dedicated skew adjustment hardware
Solution Approach 2:
The system performs self-calibration by using the transmitted test patterns to automatically measure skew and adjust delay amounts without requiring external calibration equipment or manual intervention. The feedback mechanism enables the system to autonomously optimize its performance
Data Source
Figure 1
Figure 2
Figure 3
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.