Charge Recycling in Nonvolatile Memory Systems
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Solution Overview
Problem
The increasing power consumption of memory systems due to higher device integration in nonvolatile memory devices, such as NAND and NOR flash memory devices, necessitates a solution to reduce energy usage while maintaining data storage efficiency.
Innovation Solution
A memory system incorporating a charge recycler and controller to discharge and recycle charges from nonvolatile memory devices, where the charge recycler precharges and reuses the discharged energy, reducing power consumption by utilizing the recycled charges to power the memory devices and power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple memory devices operate in parallel to increase data storage capacity and improve access speed, then productivity and speed are improved, but power consumption increases significantly
Solution Approach 1:
The patent recovers discharged charges from bitlines after program operations and stores them in charge recyclers. These recovered charges are then reused to precharge bitlines for subsequent operations, reducing the need for fresh power supply and thereby lowering overall power consumption while maintaining high-speed parallel operations
Solution Approach 2:
The system uses its own discharged charges to service future precharging needs. The charge recyclers capture and store charges internally, then automatically reuse them for precharging operations, creating a self-sustaining energy recycling mechanism within the memory system
2Productivity
If device integration level is increased to improve memory density, then productivity is improved, but power consumption increases
Solution Approach 1:
The charge recycler captures discharged charges that would otherwise be wasted, and stores them for future reuse. This recovery mechanism reduces the total power needed to operate high-density integrated memory devices by reusing energy from previous operations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces power consumption in memory systems by reusing discharged energy, enhancing the efficiency of data storage operations and minimizing energy wastage, particularly during program operations in flash memory devices.
Implementation Method 1
a charge recycler configured to discharge charges from the nonvolatile memory device and recycle the discharged charges
Data Source
AI summary
A memory system, including a nonvolatile memory device, a charge recycler configured to discharge charges from the nonvolatile memory device and recycle the discharged charges, and a controller configured to control the nonvolatile memory device and the charge recycler, wherein the controller controls the charge recycler to recycle the discharged charges, wherein during the recycling the charge recycler charges the charges discharged from the nonvolatile memory device.