Differential Link Identification Using Common-Mode Voltages

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Solution Overview

Problem

Existing computer systems with multi-drop communication links face increased costs and complexity due to the need for hardware jumpers or dedicated wires to program unique identifiers for peripheral devices, which complicates manufacturing and increases overhead.

Innovation Solution

Utilizing common mode operating voltages of differential signals to program identifiers for devices on multi-drop communication links, eliminating the need for hardware jumpers or additional wiring by sending unique identifiers via differential signal common mode voltages.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If hardware jumpers or dedicated wires are used to program unique identifiers for peripheral devices, then identifier programming capability is achieved, but manufacturing cost and system complexity increase

Engineering Contradiction:

Improvemanufacturing costVSAvoidsystem complexity

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent merges the identifier programming function with the existing differential signal communication channel by encoding identifiers in the common mode voltage of the differential signals. This eliminates the need for separate hardware jumpers or dedicated programming wires, as the same communication infrastructure is used for both data transmission and identifier programming, thereby reducing manufacturing cost and system complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The differential signal communication channel is given multiple functions: it simultaneously handles data communication and identifier programming. By encoding identifier information in the common mode voltage component of the differential signals, the existing communication infrastructure serves dual purposes, eliminating the need for additional dedicated hardware components for identifier programming.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If hardware jumpers are used for identifier programming, then unique device identification is achieved, but wiring overhead and manufacturing complexity increase

Engineering Contradiction:

Improvedevice identificationVSAvoidwiring overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent combines the identifier programming function with the existing differential signal communication channel. By encoding identifiers in the common mode voltage of the differential signals already present on the communication link, the system eliminates the need for separate hardware jumpers or dedicated programming wires, thereby reducing wiring overhead while maintaining reliable device identification.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If dedicated wires are used for identifier programming, then unique device identification is achieved, but manufacturing cost and overhead increase

Engineering Contradiction:

Improvedevice identificationVSAvoidmanufacturing overhead

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The differential signal communication channel is designed to perform multiple functions simultaneously. By encoding identifier information in the common mode voltage component, the existing communication infrastructure is used for both data transmission and identifier programming, eliminating the need for additional dedicated wires and reducing manufacturing overhead.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Reduces manufacturing costs and complexity by avoiding the use of hardware jumpers and dedicated wires, enabling efficient and cost-effective programming of unique identifiers for peripheral devices.

Implementation Method 1

send a first identifier to a first peripheral device using a first common mode voltage on a first point-to-point communication link

Methodology Applied

Scientific EffectDifferential signal common mode voltage:

Data Source

PatentUS20260039504A1Network identification using differential voltages

Publication Date: 2026.02.05 VERTIV CORP

AI summary

A computer system that allows a central device to transmit identification information to multiple peripheral devices is disclosed. The central device is coupled to multiple peripheral devices via respective point-to-point communication links. The central device may send a first identifier to a particular peripheral device of the multiple peripheral devices using a particular common mode voltage on a particular point-to-point communication link that is coupled between the central device and the particular peripheral device.