Memory Receiver Circuit for Data Strobe Noise Suppression

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Solution Overview

Problem

LPDDR4 memory devices experience malfunctions due to noise amplification in data strobe signals when the write data strobe function is off, leading to logic state uncertainties and control circuit failures.

Innovation Solution

A memory device with a receiver circuit that includes a differential amplifier, an auxiliary control circuit, and a data strobe control circuit to generate and control data strobe signals, using a disable control signal to manage noise interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the write data strobe function is turned off, then power consumption is reduced, but noise on data strobe signals is amplified causing logic state uncertainties

Engineering Contradiction:
Improvepower consumptionVSAvoidlogic state stability
Core Design Contradiction:
Use of energy by moving objectVSReliability

Solution Approach 1:

The patent implements dynamic control of the data strobe signal by enabling a write data strobe function that generates artificial strobe signals during write operations when the memory controller's strobe function is off. This dynamic addition of functionality allows the system to maintain reliability while managing power consumption by selectively activating the strobe generation based on operational mode.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent introduces an intermediary write data strobe function that acts as a mediator between the memory controller and the memory device. This intermediary function generates controlled strobe signals that prevent noise amplification while maintaining proper signal levels, thus resolving the contradiction between power savings and signal reliability.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Power

If the differential amplifier amplifies data strobe signals, then signal strength is improved, but noise is also amplified causing logic state variations

Engineering Contradiction:
Improvesignal strengthVSAvoidnoise amplification
Core Design Contradiction:
PowerVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful effect of noise amplification into a beneficial control mechanism by implementing a write data strobe function that deliberately generates controlled artificial strobe signals. This approach uses the amplifier's inherent gain characteristic to produce strong, clean signals rather than merely amplifying noisy incoming signals, thus transforming the potential harm into a useful feature.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent changes the operational parameters of the data strobe signal by switching between different signal sources and modes. During write operations, it generates artificial strobe signals with controlled amplitude and timing parameters, while during read operations, it uses the differential amplifier to amplify incoming signals. This parameter switching allows the system to optimize signal strength while avoiding noise amplification in appropriate operating conditions.

Inventive Principle:
Principle #35Parameter changes

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 effectively suppresses noise-induced logic state variations in data strobe signals, preventing control circuit malfunctions and ensuring reliable memory operations.

Implementation Method 1

The differential amplifier is configured to amplify the first data strobe signal and the second data strobe signal to generate a third data strobe signal and a fourth data strobe signal

Methodology Applied
Scientific EffectSignal amplification:

Data Source

PatentUS12499927B2Memory device with receiver circuit to suppress noise on data strobe signals
Publication Date: 2025.12.16 NAN YA TECH
  • US12499927B2 patent drawing
  • US12499927B2 patent drawing
  • US12499927B2 patent drawing

AI summary

A method for controlling data strobe signals for use in a memory device is provided. The memory device includes a receiver circuit having a differential amplifier, an auxiliary control circuit, and a data strobe control circuit. The method includes the following steps: utilizing the differential amplifier to amplify a first data strobe signal and a second data strobe signal received from a memory controller to generate a third data strobe signal and a fourth data strobe signal; utilizing the auxiliary control circuit to generate a disable control signal using the first data strobe signal and the second data strobe signal; and disabling the data strobe control circuit in response to the disable control signal being in a high logic state.