Bidirectional Transmission System Automatic Pre-emphasis Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bidirectional transmission systems face challenges in optimizing pre-emphasis settings for differential serial interfaces, particularly in long-distance in-vehicle applications, where parasitic resistances and capacitances cause waveform distortion, requiring manual adjustment of circuit parameters for each transmission path, increasing design time and costs.
Innovation Solution
A bidirectional transmission system that automatically optimizes circuit operation parameters by using a controller to set driver settings based on feedback control signals, reducing error rates through adaptive adjustment of signal amplitude, pre-emphasis, and equalization functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual adjustment of pre-emphasis circuit settings is performed for each transmission path, then communication quality is improved, but design time and costs increase
Solution Approach 1:
The system enables automatic optimization of pre-emphasis circuit settings through self-diagnosis functions. The transmission path characteristics are automatically measured and the pre-emphasis parameters are adjusted without manual intervention, allowing the system to optimize itself for each transmission path while reducing design time and costs
Solution Approach 2:
The system implements automatic measurement of transmission path characteristics and uses this feedback to adjust pre-emphasis circuit settings. By measuring the actual transmission path properties and feeding this information back to the pre-emphasis control, the system automatically optimizes communication quality without requiring manual adjustment for each path
2Manufacturing precision
If pre-emphasis circuit settings are optimized for a given transmission path, then waveform distortion is reduced, but the settings cannot be applied to other transmission paths
Solution Approach 1:
The system automatically adjusts pre-emphasis circuit parameters based on measured transmission path characteristics. By changing the pre-emphasis parameters (such as boost amount and frequency) according to the specific properties of each transmission path, the system maintains waveform quality across different paths without manual reconfiguration
Solution Approach 2:
The pre-emphasis settings are made dynamic rather than fixed. The system continuously adapts the pre-emphasis parameters based on the actual transmission path conditions, allowing the same system to optimize performance across multiple different transmission paths by adjusting parameters in real-time or near-real-time
3Reliability
If designer adjusts pre-emphasis settings for each set, then transmission path characteristics are optimized, but device complexity and design process complexity increase
Solution Approach 1:
The system incorporates self-diagnosis and automatic optimization functions that eliminate the need for manual design adjustments. The transmission path characteristics are automatically measured and the pre-emphasis settings are self-adjusted, reducing the complexity of the design process while maintaining transmission reliability
Data Source
AI summary
A first receiver receives second serial data transmitted from a second circuit. A second receiver receives first serial data transmitted from a first circuit. An automatic adjustment circuit generates a control signal so as to reduce an error rate of the first serial data received by the second receiver. A second driver drives a differential transmission path according to the second serial data including the control signal. An operation parameter of a first driver is set based on the control signal included in the second serial data.