Memory Voltage Generation Systems Adaptive Power Management
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Solution Overview
Problem
Memory devices face increased access times due to the turn-on and turn-off periods of voltage generation systems, which hinder efficient read, program, and erase operations.
Innovation Solution
Implementing a method where each voltage generation system is turned on in response to a first command and remains on until no commands are processed, and then slowly discharged into an idle state, allowing subsequent commands to be processed without delay and reducing the warm-up period if received before reaching the idle state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If voltage generation systems are turned off and placed into idle state when not in use, then power consumption is reduced, but access time increases due to required warm-up period
Solution Approach 1:
The voltage generation system transitions between different operational states (fully on, partially on, idle) based on workload conditions. The controller dynamically adjusts the number of voltage generation systems active according to command queue depth, enabling adaptive power management that balances energy savings with access time requirements
Solution Approach 2:
When commands are predicted or queued in advance, the controller proactively activates voltage generation systems before they are actually needed for processing. This preliminary activation eliminates warm-up delays when commands arrive, as the systems are already in operational state ready to process commands immediately
2Loss of time
If voltage generation systems remain on continuously, then access time is reduced, but power consumption increases
Solution Approach 1:
Instead of keeping all voltage generation systems fully on continuously, the system activates only the necessary number of systems based on actual workload demands. The controller monitors command queues and activates additional systems only when needed, avoiding the power waste of keeping excess systems running while ensuring sufficient systems are available to meet access time requirements
3Productivity
If multiple voltage generation systems are activated simultaneously, then processing capacity is increased, but power mode optimization is reduced
Solution Approach 1:
The voltage generation system is divided into multiple independent, modular units that can be activated individually. The controller selectively activates specific numbers of these modular units based on workload requirements, enabling granular control over processing capacity and corresponding power consumption levels rather than activating all systems simultaneously
Data Source
AI summary
A memory device includes a memory array comprising a plurality of planes, a plurality of voltage generation systems, and a controller. Each voltage generation system is electrically coupled to a corresponding plane. The controller is configured to turn on and warm up each voltage generation system of the plurality of voltage generation systems in response to a first command to access any plane of the plurality of planes and turn off and slowly discharge each voltage generation system of the plurality of voltage generation systems into an idle state in response to no commands being processed. In response to receiving a subsequent command to access any plane of the plurality of planes prior to the voltage generation systems reaching the idle state, a warm up period of the plurality of voltage generation systems is reduced.