Three-Level Differential Signaling With Fewer Transfer Lines
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Solution Overview
Problem
Differential signaling requires more transfer lines compared to single-ended signaling, which increases complexity and resource usage, despite offering advantages like low sensitivity to EMI and high noise immunity.
Innovation Solution
A differential data transferring system that uses three voltage levels on two transfer line sets to generate output signals, where one line is controlled to a middle voltage and the other to either high or low voltage based on the data signals, allowing for efficient data transfer with fewer lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If differential signaling is used, then noise immunity and EMI sensitivity are improved, but the number of transfer lines increases
Solution Approach 1:
The patent applies parameter changes by introducing three voltage levels (high, middle, low) instead of traditional two levels. One transfer line is controlled to maintain a middle voltage level while the other line switches between high and low voltages based on data signals. This parameter change allows differential data transmission with improved noise immunity while reducing the number of required transfer lines, directly resolving the technical contradiction between reliability and device complexity.
2Productivity
If differential signaling is used, then data transfer speed is improved, but the number of transfer lines increases
Solution Approach 1:
By changing the voltage parameter from two levels to three levels, the patent enables faster data transfer through increased signal differentiation capability. The middle voltage level provides an additional state for encoding information, allowing higher data transfer speeds while using fewer transfer lines compared to conventional differential signaling, thus resolving the contradiction between productivity and device complexity.
Data Source
AI summary
A differential data transferring system and method uses three level voltages to simultaneously transfer three signals (for example, two data signals and one clock signal) across two transfer line sets (i.e., four transfer lines). Therefore, the differential data transferring method increases transferring efficiency by using fewer transfer lines. Also, according to the differential data transferring system and method, one of two transfer lines forming a transfer line set is controlled to a middle voltage level, while the other transfer line is controlled to either a high voltage or a low voltage. Accordingly, the voltage difference between the two transfer lines may be maintained at a constant amplitude. Additionally, the difference between first and second dividing voltages DC1 and DC2, which are used for generating a reference output data, is controlled to maintain a constant amplitude. Therefore, the differential data transferring system and method may provide improved operation reliability.