Memory Voltage Supply Circuit for Multi-Stage Line Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In three-dimensional memory devices, the continuous application of a constant voltage for charging word lines or bit lines leads to increased power consumption.
Innovation Solution
A method of charging word lines or bit lines with multiple stages of varying voltages, where a first voltage is applied until a reference condition is met, followed by a second, higher voltage to complete the charging process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant voltage is continuously applied to charge word lines or bit lines, then the charging capacity increases, but power consumption increases
Solution Approach 1:
The charging process is divided into multiple stages with different charging terminals. The first charging terminal charges the word line or bit line to an intermediate voltage level, and the second charging terminal completes the charging to the final voltage level. This segmentation allows optimized power distribution across stages, reducing overall power consumption while maintaining charging capacity.
Solution Approach 2:
The first charging terminal performs preliminary charging to reach an intermediate voltage level before the second charging terminal activates. This preliminary action reduces the voltage differential that the second terminal must handle, thereby reducing peak power consumption while ensuring complete charging capacity is achieved.
2Ease of operation
If a constant voltage is continuously applied to charge word lines or bit lines, then the charging is simplified, but power consumption increases
Solution Approach 1:
The charging system dynamically switches between different charging terminals based on the charging stage. The control logic automatically transitions from the first charging terminal to the second charging terminal when the intermediate voltage level is reached, providing adaptive power management that reduces consumption while maintaining operational simplicity through automated control.
Solution Approach 2:
The charging control logic monitors the voltage level on the word line or bit line and automatically determines when to switch between charging terminals. This feedback mechanism ensures that the multi-stage charging process operates autonomously, maintaining ease of operation while optimizing power consumption through condition-based terminal selection.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed is a memory device in which at least one word line or bit line is charged by a plurality of charging terminals. The memory device includes a first charging terminal for supplying a first voltage to the at least one word line or bit line, and a second charging terminal for suppling a second voltage to the at least one word line or bit line when voltage supply by the first charging terminal is completed. The supply of the second voltage starts when a charged voltage of the at least one word line or bit line, charged by using the first voltage, satisfies a first reference condition.