Burst Access Command Timing to Distribute Electromagnetic Emissions
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Solution Overview
Problem
Memory devices experience high electromagnetic emissions due to periodically issued access commands, leading to electromagnetic interference with other devices and systems.
Innovation Solution
Adjust the periodicity of burst access operations by randomly selecting a time delay for each set of commands to distribute electromagnetic emissions across various frequencies, reducing peak emissions without altering the clock rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If access commands are issued periodically to memory devices, then data throughput is maintained, but electromagnetic emissions concentrate at specific frequencies causing interference
Solution Approach 1:
The patent applies dynamics by making the time delay between access commands variable rather than fixed. The controller dynamically adjusts the periodicity of command issuance by selecting different delay values from a set of available delays, which distributes electromagnetic emissions across multiple frequencies while maintaining the same average data throughput rate
Solution Approach 2:
The patent changes the temporal parameter of command periodicity by introducing variable time delays between access commands. By modifying the delay parameter from a fixed value to a selectable set of values, the system redistributes electromagnetic energy across different frequency components, reducing peak emissions at any single frequency while preserving overall productivity
2Object-generated harmful factors
If the periodicity of access commands is adjusted to reduce electromagnetic emissions, then electromagnetic interference is reduced, but data throughput may be affected
Solution Approach 1:
The patent uses periodic action by maintaining regular intervals between access commands while varying the specific delay values. The controller periodically issues commands at controlled intervals, ensuring that data throughput remains consistent while the varying periodicity distributes electromagnetic emissions across multiple frequencies, thereby reducing interference without sacrificing productivity
3Device complexity
If a fixed time delay is used between access commands, then system operation is simple, but electromagnetic emissions occur at concentrated frequencies
Solution Approach 1:
The patent introduces dynamics by replacing the fixed time delay with a selectable set of delay values. The controller dynamically chooses from multiple delay options based on operational requirements, which spreads electromagnetic emissions across different frequencies. This adds minimal complexity while effectively reducing electromagnetic interference
Data Source
AI summary
Methods, systems, and devices for an adjustable periodicity of burst access operations are described. Generally, the described techniques relate to mitigating electromagnetic emissions associated with issuing access commands by adjusting a periodicity according to which the access commands are issued. For example, a first set of one or more commands to perform a first type of access operation may be issued according to a first time delay and a second set of one or more commands to perform the first type of access operation may be issued according to a second time delay, which may be different or the same as the first time delay. The second time delay may be (e.g., randomly) determined based on a value that is selected by a device that issues the commands, the value associated with modifying a periodicity according to which commands to perform the first type of access operation are issued.