Multi-Lane Receiver Clock Phasing for Data Skew Control
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Solution Overview
Problem
Data skew between channels in transmission systems degrades the accuracy of data transmission and reception, particularly in systems with multiple data lanes where data signals have different phases, leading to inaccuracies in data response characteristics.
Innovation Solution
A reception device with a signal synchronization circuit to adjust the phases of data signals and generate synchronization data signals, and a signal distribution circuit to adjust the phases of clock and data signals, generating distributed clock and data signals with different phases, ensuring equal phase differences between distributed clock and data signals, thereby reducing switching noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data signals are transmitted through multiple channels simultaneously, then transmission speed and bandwidth are improved, but data skew occurs between channels causing degradation in data response characteristic accuracy
Solution Approach 1:
The patent divides the data transmission into multiple lanes (first data lane, second data lane, etc.) that can be transmitted simultaneously through different channels. Each lane is processed independently with its own phase adjustment, allowing high-speed parallel transmission while maintaining control over phase relationships to minimize skew-induced errors.
Solution Approach 2:
The patent dynamically adjusts the phase of data signals and clock signals as configurable parameters. By changing phase parameters through phase adjustment circuits, the system compensates for channel-specific skew while maintaining optimal data response characteristics, thus preserving accuracy despite multi-channel parallel transmission.
2Measurement precision
If phase adjustment circuits are added to synchronize data signals, then data response characteristic accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines phase adjustment functionality directly into the data reception circuitry, merging synchronization operations with existing data processing paths. This integration approach reduces the need for separate, complex synchronization modules while achieving the required phase alignment for accurate data response characteristics.
Solution Approach 2:
The phase adjustment circuits are designed to handle multiple data lanes simultaneously and can work with different clock distributions. This multi-functional design allows a single circuit architecture to serve various synchronization needs across different channels, reducing overall system complexity compared to having separate adjustment circuits for each lane.
3Speed
If clock signal is distributed to multiple data lanes, then processing speed is improved, but switching noise increases due to simultaneous switching
Solution Approach 1:
The patent introduces distributed clock signals with different phases for different data lanes, creating a periodic switching pattern that staggers the switching events across time. This periodic distribution of clock edges ensures that not all lanes switch simultaneously, thereby reducing peak switching noise while maintaining high processing speed through parallel operation.
4Object-generated harmful factors
If different phases are assigned to distributed data signals, then switching noise is reduced, but synchronization complexity increases
Solution Approach 1:
The patent employs phase adjustment circuits that can be configured based on detected skew conditions. The system uses feedback from skew detection to automatically adjust phase parameters, creating a self-regulating synchronization mechanism that manages the complexity of multi-phase distribution without requiring manual intervention or complex external control.
Data Source
AI summary
A reception device that communicates with a transmission device is provided. The reception device includes a reception circuit configured to receive a clock signal, a first data signal, and a second data signal from the transmission device, a signal synchronization circuit configured to adjust the phases of the first data signal and the second data signal, and generate a first synchronization data signal and a second synchronization data signal, a signal distribution circuit configured to adjust the phase of the clock signal and generate a first distributed clock signal and a second distributed clock signal, and adjust the phases of the first synchronization data signal and the second synchronization data signal and generate a first distributed data signal and a second distributed data signal, and an output circuit configured to process the first distributed data signal and the second distributed data signal.