Memory Reference Voltage Switching for Faster Read and Write Modes

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Solution Overview

Problem

Existing memory devices face challenges in optimizing reference voltage levels for both read and write operations, leading to inefficiencies in operation speed and the inability to adjust to different voltage requirements for various modes.

Innovation Solution

The implementation of read and write voltage control circuits, along with capacitive coupling mechanisms, allows for dynamic adjustment of reference voltage levels during read and write operations, enhancing the memory device's performance by optimizing voltage levels for different modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single reference voltage level is used for both read and write operations, then the device complexity is reduced, but the operation speed and performance are degraded due to inability to optimize voltage levels for different modes

Engineering Contradiction:

Improvevoltage control circuit complexityVSAvoidread operation speed

Core Design Contradiction:

Device complexityVSSpeed

Solution Approach 1:

The voltage control functionality is segmented into separate read voltage control circuit and write voltage control circuit, each independently adjusting reference voltage for their respective operations. This segmentation allows optimization of voltage levels for read and write operations without requiring a single complex control mechanism, thereby improving read speed while maintaining manageable device complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reference voltage level is made dynamic rather than fixed, allowing it to be adjusted in real-time based on the operation mode (read or write). The voltage control circuits dynamically modify the reference voltage to optimal levels for current operations, improving performance while the modular dynamic control architecture keeps complexity manageable.

Inventive Principle:

Principle #15Dynamics

2Productivity

If the reference voltage is adjusted dynamically for different operation modes, then the operation speed and performance are improved, but the device complexity increases due to additional control circuits

Engineering Contradiction:

Improvememory operation efficiencyVSAvoidvoltage control circuit structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

Different voltage control circuits are designed with specialized local qualities optimized for their specific functions. The read voltage control circuit is optimized for read operation requirements while the write voltage control circuit is optimized for write operations. This local optimization approach improves overall productivity while keeping each control circuit relatively simple and manageable.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The voltage control system is designed with universal principles where similar control mechanisms are reused across read and write paths. Both control circuits employ comparable architectural patterns and design methodologies, allowing the system to achieve multi-functionality (handling both read and write voltage control) while minimizing overall complexity through design reuse and standardization.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If the reference voltage level is fixed, then the device complexity is reduced, but the ability to adapt to different voltage requirements for various operation modes is lost

Engineering Contradiction:

Improvevoltage level adaptation capabilityVSAvoidcontrol circuit architecture

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The reference voltage transitions from a fixed value to a dynamic parameter that can be adjusted based on operation mode requirements. The voltage control circuits implement dynamic adjustment mechanisms that modify the reference voltage in real-time, enabling the system to adapt to different voltage requirements for read and write operations while maintaining a relatively simple control architecture through modular design.

Inventive Principle:

Principle #15Dynamics

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 improves the speed of read operations and ensures that the reference voltage signal accurately tracks the write minimum operating voltage value across different operation modes, thereby enhancing the overall performance of the memory device.

Implementation Method 1

a first capacitor coupled between a first node and a second node

Methodology Applied

Scientific EffectCapacitive coupling: Capacitance

Data Source

PatentUS12475943B2Memory device adjusting reference voltage signal

Publication Date: 2025.11.18 TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD

AI summary

A memory device includes a memory array, a first reference voltage circuit, a first read voltage control circuit and a first write voltage control circuit. The first reference voltage circuit is configured to provide a first reference voltage signal having a first voltage level to the memory array. The first read voltage control circuit is configured to adjust the first reference voltage signal to a second voltage level when the memory array is read. The first write voltage control circuit is configured to adjust the first reference voltage signal to a third voltage level when the memory array is written. The second voltage level is higher than the first voltage level, and the third voltage level is lower than the first voltage level.