Memory Device Master Word Line Voltage Control
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Solution Overview
Problem
Memory devices face inefficiencies in power consumption due to indiscriminate pulsing of the master word line voltage between activating different individual word lines, leading to increased power usage.
Innovation Solution
Implementing a method to determine if consecutive activation commands are for word lines coupled with the same master word line, allowing the memory device to maintain the master word line voltage below a threshold level between activations, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the master word line voltage is indiscriminately pulsed between activating different individual word lines, then all word lines can be accessed, but power consumption increases
Solution Approach 1:
The patent changes the voltage parameter of the master word line dynamically - maintaining it at a high level when accessing word lines from different master word lines, and reducing it to a low level when accessing consecutive word lines from the same master word line. This parameter change resolves the contradiction by eliminating unnecessary voltage transitions, thereby reducing power consumption while preserving full word line accessibility.
2Speed
If the master word line voltage is maintained at a high level between activations, then switching speed is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic voltage pulsing of the master word line - applying high voltage only when necessary for switching between different master word lines, and maintaining low voltage during periods when consecutive word lines from the same master word line are accessed. This periodic action pattern resolves the contradiction by providing high switching speed only when needed while minimizing power consumption during sustained access operations.
3Device complexity
If unnecessary voltage changes on the master word line are performed, then word line switching is simplified, but power consumption increases
Solution Approach 1:
The patent employs feedback logic that monitors the master word line identifier and determines whether consecutive word line activations belong to the same master word line. Based on this feedback, the system selectively pulses the master word line voltage only when switching between different master word lines is required. This feedback mechanism resolves the contradiction by eliminating redundant voltage changes, thereby reducing power consumption while maintaining simplified switching control.
Data Source
AI summary
Methods, systems, and devices for power-efficient access line operation for memory are described. A memory device may drive a voltage pulse on a first word line included in a set of word lines that is coupled with a master word line. The memory device may then a voltage pulse on a second word line included in the set of word lines coupled with the master word line. In between driving the voltage pulse on the first word line and driving the voltage pulse on the second word line, the memory device may maintain a voltage on the master word line below a threshold level.