Signal Conversion for Serial Data Noise Immunity
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Solution Overview
Problem
Existing technologies face challenges in efficiently transmitting high-bandwidth serial data streams due to noise interference and material costs associated with differential signaling, which increases complexity, size, and fragility, while single-ended signaling is prone to noise errors.
Innovation Solution
A system that converts between single-ended and differential signaling using mechanisms like baluns or common-mode chokes to reject common mode noise, reducing cable complexity and using single-ended coaxial cables, and includes equalizers to address frequency losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If differential signaling is used to transmit serial data streams, then noise immunity is improved, but cable complexity and material costs increase
Solution Approach 1:
The patent introduces conversion mechanisms (baluns or common-mode chokes) as intermediaries that enable single-ended cables to function as differential cables. These converters transform the signaling mode at the receiver end, allowing the system to achieve differential noise immunity without requiring actual differential twisted-pair cables throughout the entire transmission path.
Solution Approach 2:
The patent changes the signaling parameters by converting from differential signaling to single-ended signaling through mode conversion mechanisms. This parameter transformation allows the use of simpler single-ended cables while maintaining the noise rejection benefits of differential signaling through the conversion process.
2Reliability
If differential cables are used to transmit serial data streams, then noise rejection is improved, but flexibility and ease of manufacture deteriorate
Solution Approach 1:
The conversion mechanism acts as an intermediary that bridges single-ended cables and differential signaling requirements. This allows manufacturers to use simple automated processes for single-ended cables while still achieving the noise rejection performance of differential cables through the converter.
Solution Approach 2:
The patent enables the use of simpler, cheaper single-ended cables instead of expensive differential cables. The conversion mechanism is implemented at the interface (balun or common-mode choke) rather than throughout the entire cable system, reducing overall material costs and manufacturing complexity.
3Device complexity
If single-ended signaling is used to transmit serial data streams, then cable simplicity and cost are improved, but noise immunity deteriorates
Solution Approach 1:
The balun or common-mode choke serves as an intermediary that converts single-ended signaling to differential signaling at the receiver end. This transformation enables the system to maintain noise immunity despite using simple single-ended cables for the majority of the transmission path.
Solution Approach 2:
The patent changes the signaling parameters by converting from single-ended to differential mode through the conversion mechanism. This parameter transformation allows the system to achieve differential noise rejection performance while using the simplicity and cost-effectiveness of single-ended cables.
4Reliability
If differential signaling is used to transmit high-speed serial data streams, then noise rejection is improved, but frequency range and signal integrity deteriorate due to mode conversion
Solution Approach 1:
The patent optimizes the conversion parameters by carefully designing the balun or common-mode choke characteristics to minimize frequency-dependent losses. The conversion mechanism is designed to maintain signal integrity across a broad frequency range while still providing effective noise rejection.
Solution Approach 2:
The equalizer provides feedback compensation for frequency losses introduced by the conversion mechanism and cable. This feedback mechanism compensates for high-frequency attenuation and maintains signal integrity across the desired frequency range.
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 system effectively reduces noise interference, minimizes cable material costs, and enhances flexibility by using single-ended coaxial cables while maintaining noise immunity, thus improving the frequency range and reliability of high-speed data transmission.
Implementation Method 1
the first mechanism may be a balun and/or a common-mode choke
Implementation Method 2
the first mechanism may be a balun and/or a common-mode choke
Implementation Method 3
the equalizer may correspond to a decision feedback equalizer (DFE) that performs linear and/or nonlinear equalization on the serial data stream based on loss of high-frequency content during transmission
Data Source
AI summary
The disclosed embodiments provide a system that facilitates transmission of a serial data stream. The system may include, in a receiver of the serial data stream, a first mechanism for converting from single-ended signaling to differential signaling, wherein the first mechanism facilitates rejection of common mode noise in the serial data stream. For example, the first mechanism may be a balun and/or a common-mode choke.