Weighted Voltage Feedback for Memory Die Power Management
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Solution Overview
Problem
Existing memory systems lack efficient power management, as they treat feedback from different areas of memory dies uniformly, leading to inefficient supply voltage adjustments, with some areas being more responsive to voltage changes than others.
Innovation Solution
Implementing a system that measures voltage at various areas of memory dies and applies spatially weighted feedback signals to adjust supply voltage, using both digital and analog techniques, with dynamically adjustable weights based on the sensitivity of each area, allowing for refined power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform feedback treatment is applied to all areas of memory dies, then the system is simple to implement, but power management efficiency deteriorates because some areas are more responsive to voltage changes than others
Solution Approach 1:
The patent applies different weighting factors to feedback signals from different physical areas of the memory die. Each area's feedback is multiplied by a weight that reflects its sensitivity to voltage changes, allowing the system to treat different regions differently based on their local characteristics rather than applying uniform treatment to all areas.
Solution Approach 2:
The memory die is divided into multiple distinct areas, each with its own voltage sensor and weighting factor. This segmentation allows independent analysis and adjustment of voltage requirements for each region, enabling more precise power management while maintaining system simplicity through modular architecture.
2Measurement precision
If spatially weighted feedback signals are applied to adjust supply voltage, then power delivery accuracy is improved, but system complexity increases due to multiple sensors and weighting mechanisms
Solution Approach 1:
The system uses onboard voltage sensors located at different areas of the memory die to automatically provide feedback signals. Each sensor monitors its local voltage conditions and generates feedback that is automatically weighted and used for adjustment, enabling the system to self-regulate without external intervention while maintaining high measurement precision.
Solution Approach 2:
The patent implements a closed-loop feedback mechanism where voltage sensors continuously monitor supply voltage at different areas, generate feedback signals that are weighted according to local sensitivity, and feed these weighted signals back to the voltage regulator for continuous adjustment. This feedback loop maintains voltage accuracy while the weighting mechanism manages the complexity by prioritizing critical areas.
3Device complexity
If feedback from all areas is treated equally, then the feedback system is simple to implement, but power delivery efficiency worsens due to inadequate consideration of area-specific sensitivity
Solution Approach 1:
The patent changes the parameter of feedback signal weighting by introducing area-specific weight factors that modify the influence of each feedback signal based on its origin location. This parameter change allows the system to optimize power delivery efficiency by emphasizing feedback from areas that are more sensitive to voltage changes while de-emphasizing less sensitive areas, thereby reducing energy waste without requiring complex additional hardware.
Data Source
AI summary
Methods, systems, and devices for voltage adjustment of memory dies based on weighted feedback are described. A supply voltage may be measured at various areas of a memory die, weights may be applied to the measured voltages based on the area from which the particular voltage was measured. The supply voltage may be adjusted based on the weighted signals. The signals may be weighted using digital or analog techniques. Different durations of time in which oscillations from an oscillator circuit are counted may provide weighting for a signal. Weights applied to the signals may be dynamically adjusted, which may allow the weights to be tuned or changed based on changes to operating conditions of the memory dies.