Variable Data Rate Transmitter Calibration for Wired-Link Reliability

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing integrated circuits face challenges in achieving target data rates due to process variations, power supply voltage fluctuations, temperature changes, and component aging, leading to potential system failures and reduced yield, cost, and reliability.

Innovation Solution

A transmitter with multiple modes of operation, including a calibration mode, determines a maximum data rate based on a voltage margin corresponding to a predetermined error rate, using a fractional-N phase locked loop and iterative processes to adjust supply voltage and voltage swing, enabling dynamic adaptation of data rates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If circuits are designed based on target performance characteristics, then manufacturing precision and design targets are improved, but process variations, power supply voltage fluctuations, temperature changes, and component aging cause performance to fall below targets

Engineering Contradiction:

Improvecircuit performance consistencyVSAvoidperformance under varying conditions

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The interface circuit dynamically adjusts its data rate based on real-time performance monitoring and feedback. The system transitions from a static design approach to a dynamic adaptation approach, where the data rate can be modified during operation to maintain reliable communication despite environmental variations and component aging.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system implements a feedback mechanism that monitors communication performance and uses this information to adjust the data rate. The receiver detects errors and communicates back to the transmitter, which then adapts the data rate to maintain acceptable error rates, creating a closed-loop control system.

Inventive Principle:

Principle #23Feedback

2Device complexity

If the data rate is fixed at a target value, then design simplicity is maintained, but the system fails to adapt to process variations, power supply voltage fluctuations, temperature changes, and component aging

Engineering Contradiction:

Improveinterface design simplicityVSAvoiddata rate adaptation capability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The interface implements dynamic data rate adjustment capability, allowing the system to adapt to varying conditions. The data rate is no longer fixed but can be modified based on performance feedback, enabling the system to maintain reliable operation across different process variations, temperature conditions, and component aging states.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the data rate parameter in response to detected performance degradation. By monitoring error rates and adjusting the data rate accordingly, the system adapts to changing conditions without requiring complete redesign of the interface architecture.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the data rate is reduced to account for worst-case scenarios, then reliability under varying conditions is improved, but productivity and system performance decrease

Engineering Contradiction:

Improveoperation under worst-case conditionsVSAvoiddata transmission rate

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The system dynamically adjusts the data rate based on actual operating conditions rather than using a fixed worst-case rate. This allows the system to operate at higher data rates when conditions are favorable while maintaining reliability when conditions degrade, optimizing both productivity and reliability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system uses a conservative approach only when necessary. Instead of always operating at the worst-case data rate, the system monitors performance and reduces the data rate only when error rates indicate degradation, allowing higher productivity when conditions permit while maintaining reliability when needed.

Inventive Principle:

Principle #16Partial or excessive 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

This approach improves yield, performance, and reduces costs by allowing circuits to adapt to varying conditions, ensuring reliable operation and efficient power management.

Implementation Method 1

Methodology Applied

Scientific EffectPhase locked loop:

Data Source

PatentUS12393547B2Interface with variable data rate

Publication Date: 2025.08.19 SIGNAL LLP

AI summary

A device includes a transmitter coupled to a node, where the node is to couple to a wired link. The transmitter has a plurality of modes of operation including a calibration mode in which a range of communication data rates over the wired link is determined in accordance with a voltage margin corresponding to the wired link at a predetermined error rate. The range of communication data rates includes a maximum data rate, which can be a non-integer multiple of an initial data rate.