DDR Data Strobe Logic Adjustment for Non-Standard Signal Sync

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Solution Overview

Problem

DDR SDRAM data strobe signals that do not follow the JEDEC standard can cause malfunctions, leading to failed data write operations.

Innovation Solution

A control unit with multiple input and output stages that adjust logic states based on the identity of the data strobe signals, allowing it to regenerate or follow the signals depending on their compliance with the JEDEC standard, ensuring synchronized data transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the control unit follows the JEDEC standard strictly, then the signal processing is simple and reliable, but the memory cannot operate with non-standard data strobe signals

Engineering Contradiction:

Improvecompatibility with non-standard data strobe signalsVSAvoidcomplexity of control unit structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The control unit dynamically adjusts its signal processing mode based on whether the differential pair signals are identical or different. When signals are identical (non-standard case), the unit switches to a regeneration mode that dissociates the processed signals from the input signals. When signals are different (standard case), it operates in follow mode. This dynamic adaptation enables compatibility with non-standard signals without permanently increasing device complexity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes the operational parameters of the control unit based on the input signal characteristics. By detecting whether the differential pair signals are identical, the system alters its signal processing behavior - either following the input signals or regenerating differentiated processed signals. This parameter change allows the memory to accommodate non-standard data strobe signals while maintaining proper operation.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the control unit regenerates processed signals when input signals are identical, then synchronization is maintained, but the processing complexity increases

Engineering Contradiction:

Improvesynchronization reliabilityVSAvoidcomplexity of signal processing circuit

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The control unit automatically detects when the differential pair signals are identical and self-adjusts its processing mode without external intervention. The unit serves itself by monitoring its own input signals and switching between follow mode and regeneration mode as needed, maintaining synchronization reliability without requiring complex external control mechanisms.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The signal processing circuit dynamically switches between two operational states based on the input signal condition. When inputs are identical, it transitions to regeneration mode to maintain synchronization; when inputs are different, it returns to follow mode. This dynamic state switching achieves reliable synchronization without permanently complicating the processing circuit.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If the control unit uses multiple input and output stages, then it can handle non-standard signals, but the device structure becomes more complex

Engineering Contradiction:

Improveability to accept non-standard data strobe signalsVSAvoidnumber of input and output stages

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The control unit with multiple input and output stages serves multiple functions: it can process both standard and non-standard data strobe signals, and it can dynamically switch between following mode and regeneration mode. This multi-functionality enables the device to accommodate various signal types while justifying the increased structural complexity through enhanced adaptability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The multiple input and output stages are not statically required for all operations but are dynamically engaged based on signal characteristics. The control unit activates the appropriate processing path depending on whether the differential pair signals are identical, making the additional structural elements serve a specific adaptive purpose rather than being permanent complexity.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12614584B2Method for adjusting logic states of data strobe signals used by memory device

Publication Date: 2026.04.28 NAN YA TECH

AI summary

A control unit in a memory and a method of controlling a memory are provided. The control unit includes a first input stage, a second input stage, a first output stage, and a second output stage. The first input stage is configured to receive a first signal and a second signal. The second input stage is configured to receive the first signal and the second signal. The first output stage is connected to the first input stage and configured to generate a first processed signal. The second output stage is connected to the second input stage and configured to generate a second processed signal. If the first signal and the second signal are identical, the first processed signal and the second processed signal are different.