Differential Transceiver Pin Cleaning for Oxidized Connectors

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Solution Overview

Problem

Oxide buildup on connectors in differential communication systems increases impedance, leading to communication failures and malfunctions, particularly in modular LED systems using less expensive materials that are prone to oxidation.

Innovation Solution

Implementing transceiver circuits with cleaner circuits that maintain floating receiver pins at low voltage levels and couple them to ground during a cleaning mode, while applying a higher voltage to transmitter pins to break down oxide, and using a differential communication bus to establish a low impedance path for effective cleaning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If connectors are constructed from materials that resist oxidation (e.g., gold), then oxide formation is reduced, but manufacturing cost increases

Engineering Contradiction:

Improveresistance to oxidationVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The system performs self-cleaning by applying high voltage across the connector interface during a cleaning mode, causing oxide breakdown and current flow that removes oxide buildup without external intervention or replacement of components

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The cleaning operation is performed periodically or on-demand by activating a cleaning mode that applies high voltage pulses to break down oxide, with the system transitioning between normal operation and cleaning modes

Inventive Principle:

Principle #19Periodic action

2Reliability

If high voltage is applied to break down oxide, then cleaning effectiveness is improved, but risk of damaging components increases

Engineering Contradiction:

Improveoxide removal effectivenessVSAvoidcomponent damage risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system dynamically switches between normal operating voltage and high cleaning voltage based on the state of the connector, applying high voltage only during brief cleaning intervals when oxide breakdown is needed, then returning to safe operating voltages

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The differential communication bus serves as an intermediary path that allows high voltage to be applied across the oxide layer without directly exposing sensitive receiver circuits to the high voltage, as the cleaning occurs through the transmitter output stage

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If receiver pins are left floating during cleaning mode, then oxide breakdown voltage is achieved, but voltage control becomes difficult

Engineering Contradiction:

Improveoxide breakdown capabilityVSAvoidvoltage control

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The cleaning operation is segmented into distinct phases: a first phase where receiver pins are left floating to achieve oxide breakdown voltage, followed by a second phase where receiver pins are coupled to ground to establish a low impedance path and control voltage levels

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system maintains continuous control over the cleaning process by transitioning from the floating state (enabling breakdown) to the grounded state (enabling control), ensuring that useful action continues throughout the cleaning mode without interruption or loss of control

Inventive Principle:

Principle #20Continuity of useful action

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 breaks down oxide buildup, maintaining system functionality by ensuring low impedance paths and enabling reliable communication in the presence of oxide, thereby preventing system failures.

Implementation Method 1

couple the plurality of transmit pins to a cleaning voltage that is greater than the operating supply voltage

Methodology Applied

Scientific EffectElectrical breakdown:

Implementation Method 2

maintain, during a first phase of the cleaning mode, floating receiver pins of the plurality of receiver pins at respective voltage levels that are less than a cleaning voltage

Methodology Applied

Scientific EffectVoltage control:

Implementation Method 3

couple the plurality of receiver pins to a ground supply node using a second phase of the cleaning mode

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 4

source respective currents to the plurality of transmit pins during the second phase of the cleaning mode

Methodology Applied

Scientific EffectElectrical current:

Data Source

PatentUS12592532B2Contact cleaning for differential communication systems

Publication Date: 2026.03.31 SEMICON COMPONENTS IND LLC

AI summary

A transceiver circuit that includes circuits for cleaning oxidation from input and output pins is disclosed. During a first phase of a cleaning operation, a first cleaner circuit may maintain floating input pins at a voltage level less than a cleaning voltage that is greater than an operating supply voltage. During a second phase of the cleaning operation, the first cleaner circuit may couple the input pins to a ground supply node. A second cleaner circuit may, during the first phase of the cleaning operation, couple the output pins to the cleaning voltage. During the second phase of the cleaning operation, the second cleaner circuit may source respective currents to the output pins.