DRAM Bit Line Voltage Stabilization via Segmented Modules

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Solution Overview

Problem

Dynamic random access memory (DRAM) bit line voltages experience significant drops during read/write operations, leading to inefficiencies and reduced accuracy in voltage stabilization.

Innovation Solution

A voltage-stabilizing circuit comprising a voltage-dividing module, a first stabilizing module, and a second stabilizing module, which generate reference voltages and corresponding stabilizing voltages to maintain bit line voltages, with operational amplifiers and transistors adjusting resistor values to complementarily adjust resistances, enabling efficient stabilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional voltage stabilization methods are used, then bit line voltages can be maintained, but significant current is consumed and voltage drops occur during read/write operations

Engineering Contradiction:

Improvebit line voltage stabilityVSAvoidworking current

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The voltage stabilizing circuit is divided into multiple operational amplifiers (first and second stabilizing modules) that operate in different conditions. The first stabilizing module handles normal operations while the second stabilizing module activates during read/write operations to provide additional stabilization, segmenting the stabilization function to reduce overall current consumption and prevent voltage drops.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The circuit dynamically switches between different stabilizing modules based on operational conditions. A controlling module determines when to activate the first or second stabilizing module, allowing the system to adapt its current consumption and stabilization strength to the actual operational needs, thereby reducing unnecessary current usage while maintaining voltage stability.

Inventive Principle:

Principle #15Dynamics

2Reliability

If voltage stabilization is strengthened to prevent bit line voltage drops, then voltage stability improves, but circuit complexity increases

Engineering Contradiction:

Improvevoltage stabilization accuracyVSAvoidcircuit structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The stabilization function is segmented into two specialized modules: the first stabilizing module for normal operations and the second stabilizing module for read/write operations. This segmentation allows each module to be optimized for its specific function, achieving high stabilization accuracy without requiring a single overly complex circuit design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The controlling module provides universal control over both stabilizing modules, determining which module to activate based on operational conditions. This multi-functional control approach allows the system to achieve complex stabilization requirements through a relatively simple control logic, balancing accuracy and complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

The solution reduces the working current required for bit line voltage stabilization, increases accuracy, and enhances the efficiency of the voltage-stabilizing process by maintaining stable bit line voltages across different operation states.

Implementation Method 1

The voltage-dividing module includes a plurality of resistors and a transistor unit. The transistor unit is coupled to the plurality of resistors and is configured to complementarily adjust resistances of the plurality of resistors.

Methodology Applied

Scientific EffectVoltage division: Electrical Resistance

Implementation Method 2

The first stabilizing module includes an operational amplifier coupled to the voltage-dividing module, wherein the operational amplifier is configured to generate the first stabilizing voltage. The second stabilizing module includes two operational amplifiers, both coupled to the voltage-dividing module.

Methodology Applied

Scientific EffectElectrical amplification: Electromagnetic Induction

Implementation Method 3

The transistor unit is coupled to the plurality of resistors and is configured to complementarily adjust resistances of the plurality of resistors.

Methodology Applied

Scientific EffectResistive adjustment: Electrical Resistance

Data Source

PatentUS10468089B1Voltage-stabilizing circuit, DRAM, and method for stabilizing a bit line voltage

Publication Date: 2019.11.05 NAN YA TECH

AI summary

A voltage-stabilizing circuit includes a voltage-dividing module, a first stabilizing module and a second stabilizing module. The voltage-dividing module is configured to generate a plurality of reference voltages. The voltage-dividing module includes a plurality of resistors and a transistor unit. The transistor unit is coupled to the plurality of resistors and is configured to complementarily adjust resistances of the plurality of resistors. The first stabilizing module is coupled to the voltage-dividing module and is configured to generate a first stabilizing voltage. The first stabilizing voltage is equal to a middle one of the plurality of reference voltages. The second stabilizing module is coupled to the voltage-dividing module and is configured to generate a second stabilizing voltage. The second stabilizing voltage is equal to one of the plurality of reference voltages other than the middle one.