Single Communication Path Equalization for On-Die ISI Control

Solution Overview

Problem

Inter-symbol interference (ISI) limits the signal speeds of semiconductor devices by causing bandwidth constraints due to overlapping symbols, which corrupt data and hinder efficient communication.

Innovation Solution

A selectively tunable communication path with an adjustment circuit, including an on-die equalizer and feedback loop, adjusts signal propagation to accommodate multiple speeds without separate paths, reducing power consumption and circuit footprint.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate communication paths are used for different signal speeds, then signal integrity is improved, but device complexity and power consumption increase

Engineering Contradiction:

Improvesignal integrityVSAvoidcircuit footprint

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements a single communication path that can operate at multiple signal speeds (e.g., 1.6 GT/s and 3.2 GT/s) by dynamically adjusting the fan-out configuration of drivers and equalizer settings based on the operating mode, eliminating the need for separate dedicated paths for different speeds while maintaining signal integrity across all modes

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The communication path employs dynamic reconfiguration capabilities where the fan-out ratio of drivers and equalizer parameters are adjusted in real-time based on the selected operating speed, allowing the same physical path to adapt its characteristics to maintain optimal signal integrity at different data rates

Inventive Principle:

Principle #15Dynamics

2Reliability

If separate communication paths are used for different signal speeds, then signal integrity is improved, but power consumption increases

Engineering Contradiction:

Improvesignal integrityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements a single communication path that can operate at multiple signal speeds (e.g., 1.6 GT/s and 3.2 GT/s) by dynamically adjusting the fan-out configuration of drivers and equalizer settings based on the operating mode, eliminating the need for separate dedicated paths for different speeds while maintaining signal integrity across all modes

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The communication path employs dynamic reconfiguration capabilities where the fan-out ratio of drivers and equalizer parameters are adjusted in real-time based on the selected operating speed, allowing the same physical path to adapt its characteristics to maintain optimal signal integrity at different data rates

Inventive Principle:

Principle #35Parameter changes

3Power

If higher fan-out configuration is used, then drive capacity is improved, but bandwidth is limited by ISI at higher speeds

Engineering Contradiction:

Improvedrive capacityVSAvoidbandwidth

Core Design Contradiction:

PowerVSSpeed

Solution Approach 1:

The communication path employs dynamic reconfiguration capabilities where the fan-out ratio of drivers and equalizer parameters are adjusted in real-time based on the selected operating speed, allowing the same physical path to adapt its characteristics to maintain optimal signal integrity at different data rates

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system incorporates equalizer circuits that provide feedback compensation for inter-symbol interference, dynamically adjusting equalization parameters based on the operating mode to maintain signal integrity across different fan-out configurations and speeds

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12537724B2Apparatus with speed selection mechanism and method for operating

Publication Date: 2026.01.27 MICRON TECHNOLOGY INC

AI summary

Methods, apparatuses, and systems related to an apparatus for managing on-die inter-symbol interference (ISI) are described. The apparatus may include (1) a single communication path with a set of drivers and (2) an on-die ISI prevention circuit coupled to the communication path in parallel. The single communication path may be used to propagate a slower speed signal and a higher speed signal. The on-die ISI prevention circuit may be configured to adjust the propagated signal for one of the speeds to reduce the ISI in the communicated signal.