Memory Sense Amplifier Power Switching for Sensitive Read and Write-Back

Solution Overview

Problem

Sense amplifiers in memories like ferroelectric random access memory struggle to meet the requirements of both high-sensitivity sensing and high-voltage write-back due to the core device's low withstand voltage and the need for high voltages in write operations.

Innovation Solution

A sense amplifier design with switch circuits connecting to different power supplies, allowing it to switch between low and high voltages to meet sensitivity and write-back needs, using thin gate devices sensitive to subtle voltage changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a sense amplifier uses an I/O device with high withstand voltage, then high-voltage write-back can be achieved, but the device becomes insensitive to subtle voltage differences and data cannot be accurately read

Engineering Contradiction:

Improvewithstand voltageVSAvoidsensing sensitivity

Core Design Contradiction:

StrengthVSMeasurement precision

Solution Approach 1:

The patent applies dynamics by making the sense amplifier's power supply voltage adjustable rather than fixed. The amplifier can dynamically switch between low voltage mode (for sensitive sensing during read operations) and high voltage mode (for robust write-back operations). This dynamic adaptation allows the same device to optimize its characteristics for different operational requirements, resolving the contradiction between sensing sensitivity and withstand voltage.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operating parameters of the sense amplifier by implementing multiple power supply voltage levels. The amplifier can operate at a first voltage level during read operations to maximize sensing sensitivity, and switch to a second, higher voltage level during write-back operations to provide the necessary write strength. This parameter change enables the amplifier to satisfy both sensing precision and write-back voltage requirements that cannot be met simultaneously at a single fixed voltage.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If a sense amplifier uses a thin gate device sensitive to subtle voltage changes, then high-sensitivity sensing is achieved, but the device cannot withstand high voltages required for write-back operations

Engineering Contradiction:

Improvesensing sensitivityVSAvoidwithstand voltage

Core Design Contradiction:

Measurement precisionVSStrength

Solution Approach 1:

The patent applies dynamics by making the sense amplifier's power supply voltage adjustable rather than fixed. The amplifier can dynamically switch between low voltage mode (for sensitive sensing during read operations) and high voltage mode (for robust write-back operations). This dynamic adaptation allows the same device to optimize its characteristics for different operational requirements, resolving the contradiction between sensing sensitivity and withstand voltage.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent segments the operational phases into distinct read and write-back stages, each with different voltage requirements. During read operations, the amplifier operates at a low voltage level that preserves the thin gate device's sensitivity. During write-back operations, the system switches to a high voltage level that provides the necessary write strength. This temporal segmentation allows the thin gate device to function optimally in both sensing and write-back modes without being permanently exposed to excessive voltages.

Inventive Principle:

Principle #1Segmentation

3Power

If the sense amplifier operates at high voltage for write-back, then write-back operations are enabled, but the voltage difference between power supply terminals may exceed the withstand voltage range of internal devices

Engineering Contradiction:

Improvewrite-back voltageVSAvoidexcessive voltage difference

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The patent applies dynamics by making the sense amplifier's power supply voltage adjustable rather than fixed. The amplifier can dynamically switch between low voltage mode (for sensitive sensing during read operations) and high voltage mode (for robust write-back operations). This dynamic adaptation allows the same device to optimize its characteristics for different operational requirements, resolving the contradiction between sensing sensitivity and withstand voltage.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent introduces an intermediary mechanism (voltage switching control logic) that manages the power supply voltage levels. This intermediary component coordinates the voltage selection to ensure that during write-back operations, the voltage difference between power supply terminals remains within the withstand voltage range of internal devices while still providing sufficient voltage for the write-back operation to succeed.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20260045292A1Memory, Control Method for Memory, Storage Device, and Electronic Device

Publication Date: 2026.02.12 HUAWEI TECH CO LTD

AI summary

A memory includes a sense amplifier, a first bit line, and a second bit line, and the sense amplifier includes a first switch circuit, and a second switch circuit. The first switch circuit is configured to switch a first power supply terminal between conducting electricity with a first power supply and conducting electricity with a second power supply, where a voltage of the second power supply is greater than a voltage of the first power supply.