Memory Channel Phase Offsets for Crosstalk and SSO Noise
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Solution Overview
Problem
In electronic systems with multiple channels, crosstalk and simultaneous switching output (SSO) noise occur, leading to increased voltage noise and peak power, which degrade signal quality and cause errors, especially as data transmission rates increase.
Innovation Solution
The method involves providing groups of data signals to memory components via channels and adjusting the phase of these signals to skew them relative to each other, reducing simultaneous switching noise by ensuring that data signals from different channels do not switch simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple channels transmit data signals simultaneously at high frequencies, then data transmission rate increases, but crosstalk and SSO noise increase causing signal quality degradation
Solution Approach 1:
The patent applies periodic action by organizing channels into skew groups where channels within each group transmit data in a staggered, periodic manner. Each skew group is assigned a different time offset, creating a periodic transmission pattern that prevents simultaneous switching across all channels, thereby reducing SSO noise while maintaining high data transmission rates
Solution Approach 2:
The patent segments the multiple channels into several skew groups, where each group contains a subset of channels. By dividing channels into segments (skew groups) rather than treating them as a single unified group, the system can apply different skewing patterns to each segment, effectively reducing crosstalk and SSO noise while preserving overall transmission capacity
2Reliability
If channels are skewed to reduce SSO noise and crosstalk, then signal quality improves, but channel transmission coordination becomes more complex
Solution Approach 1:
The patent changes the time-domain parameter (phase offset) of each skew group to reduce noise interference. By adjusting the skew parameter (time offset) for each group, the system improves signal quality through parameter optimization rather than through complex structural modifications, thereby managing complexity while enhancing reliability
Data Source
AI summary
The present disclosure includes methods and systems for channel skewing. One or more methods for channel skewing includes providing a number of groups of data signals to a memory component, each of the number of groups corresponding to a respective channel, and adjusting a phase of a group of data signals corresponding to at least one of the number of channels such that the group of data signals are skewed with respect to a group of data signals corresponding to at least one of the other respective channels.