Data Transmission Circuit With Pattern Inversion for Crosstalk Jitter
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Solution Overview
Problem
High-speed data transmission is hindered by jitter effects, particularly cross talk, which causes errors due to capacitance between adjacent lines, especially in two-aggressors and one-victim patterns, leading to increased jitter and difficulty in data change.
Innovation Solution
A data transmission circuit and system that includes a pattern detection unit to identify data patterns and generate an inversion signal, inverting data on inner lines when necessary, and a transmission unit to transmit this signal alongside the data, thereby reducing cross talk-induced jitter by altering the data pattern to prevent two-aggressors and one-victim scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If data is transmitted at high speed on parallel lines, then transmission speed is improved, but cross talk between adjacent lines increases causing jitter and errors
Solution Approach 1:
The pattern detection unit detects potential two-aggressors and one-victim patterns before data transmission occurs and generates inversion signals in advance. The transmission unit then inverts data on inner lines proactively based on these signals, preventing cross talk issues before they manifest during high-speed transmission.
Solution Approach 2:
The invention inverts the data logic levels on inner transmission lines when two-aggressors and one-victim patterns are detected. By transmitting inverted data (e.g., converting 0 to 1 and 1 to 0), the voltage transitions are reversed, which eliminates the harmful capacitive coupling effects that cause cross talk and jitter between adjacent lines.
2Reliability
If data inversion is applied to mitigate cross talk, then jitter is reduced, but device complexity increases due to pattern detection and inversion control circuits
Solution Approach 1:
The pattern detection unit only monitors and applies inversion to inner lines that are susceptible to two-aggressors and one-victim patterns, rather than all transmission lines. This selective approach reduces the complexity of the inversion control circuit while effectively addressing cross talk only where it occurs.
Solution Approach 2:
The transmission unit automatically inverts data on inner lines based on inversion signals generated from the same transmission system's own pattern detection. The system self-regulates by using its detected patterns to control its own inversion operation, eliminating the need for external complex control mechanisms.
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 reduces jitter caused by cross talk, enabling stable high-speed data transmission by preventing the occurrence of two-aggressors and one-victim patterns on transmission lines, thus minimizing errors.
Implementation Method 1
The cross talk occurs due to a capacitance generated between adjacent lines.
Implementation Method 2
invert some of the data to be loaded on the inner lines in response to the inversion signal
Implementation Method 3
transmit data to the plurality of transmission lines and the inversion signal to an inversion line
Data Source
AI summary
A data transmission/reception system includes a data transmission circuit and a data reception circuit. The data transmission circuit includes a pattern detection unit configured to detect a pattern of data to be loaded on inner lines among a plurality of transmission lines and generate an inversion signal, and a transmission unit configured to transmit data to the plurality of transmission lines and the inversion signal to an inversion line, and invert some of the data to be loaded on the inner lines in response to the inversion signal. The data reception circuit is configured to invert the data inverted by the transmission unit among the data transferred to the plurality of transmission lines, in response to the inversion signal.