Dynamic Write Throughput Control for Flash Memory via Voltage Monitoring
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Solution Overview
Problem
Flash memory devices are limited by their write throughput, which is often constrained by the current capacity of the charge pump, particularly at lower supply voltages, preventing them from taking advantage of increased current availability at higher voltages.
Innovation Solution
A memory device that monitors the power supply level and adjusts write throughput by generating control signals to activate or deactivate memory array portions based on the determined current capacity, allowing for dynamic adjustment of write operations in response to changes in supply voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the memory device is designed to guarantee throughput at minimum supply voltage (2.6V), then reliability is improved, but productivity deteriorates because the device cannot take advantage of higher currents available at higher voltages
Solution Approach 1:
The patent implements dynamic adjustment of write throughput based on detected power supply voltage levels. The memory device transitions from a static throughput design (guaranteed at minimum voltage) to a dynamic system that adapts throughput to actual operating conditions, allowing higher throughput when higher voltage is detected and lower throughput when minimum voltage is detected.
Solution Approach 2:
The patent changes the operating parameter of write throughput based on the power supply voltage parameter. By detecting the actual voltage level and adjusting the number of memory drivers activated accordingly, the system optimizes throughput to match the available current capacity at each voltage level.
2Productivity
If the charge pump current capacity is increased to support higher throughput, then productivity is improved, but use of energy worsens due to higher power consumption
Solution Approach 1:
The patent applies partial action by activating only the number of memory drivers necessary for the detected voltage level. Instead of always activating all available drivers (excessive action), the system activates a portion of drivers matching the available current capacity, thereby reducing unnecessary power consumption while maintaining adequate throughput.
Solution Approach 2:
The system dynamically adjusts the number of active memory drivers based on real-time voltage detection, allowing the power consumption to match the actual throughput requirements rather than operating at a fixed high-power state.
Data Source
AI summary
Techniques that allow dynamic management of throughput in a memory device based on a power supply voltage are provided. In an example embodiment, a method of operating a memory device comprises monitoring on the power supply level applied to the device and determining a corresponding number of bitlines that the device can activate at the same time, generating a control signal based on the number of bitlines, and using the control signal to activate a portion of the memory device corresponding to the determined number of bitlines.