DC-Balanced Signal Transmission Line Input Biasing
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Solution Overview
Problem
Conventional data transmission systems experience data loss at the start of each transmission due to the attenuation of AC components in DC-balanced signals, leading to inefficiencies and increased costs with the need for auxiliary transmitters and receivers.
Innovation Solution
Holding the input of the transmission line at an intermediate DC level between the high and low states of the DC-balanced signal before transmission, and using a compensating pulse to ensure data integrity at the start of transmission, prevents data loss and reduces the need for auxiliary components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a DC-balanced signal is transmitted over a transmission line, then the signal maintains a substantially constant average DC level, but data is lost at the start of each transmission
Solution Approach 1:
The patent applies preliminary action by holding the input of the transmission line at an intermediate DC level before the actual data transmission begins. This preparatory step ensures that the transmission line is properly biased and ready to receive the DC-balanced signal, preventing data loss at the start of transmission while maintaining DC level stability throughout the signal
2Reliability
If auxiliary transmitters and receivers are added to detect and retransmit lost data, then data integrity is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent extracts the data integrity function from a separate auxiliary detection and retransmission system and integrates it directly into the main transmission path. By holding the transmission line input at an intermediate DC level, the system inherently prevents data loss at the start of transmission, eliminating the need for complex auxiliary components while maintaining reliable data integrity
3Reliability
If auxiliary transmitters and receivers are added for error detection and retransmission, then data reliability is improved, but power consumption increases
Solution Approach 1:
The patent removes the need for power-consuming auxiliary error detection and retransmission systems by integrating the reliability function into the core transmission mechanism. The intermediate DC level holding technique prevents data loss inherently, eliminating the need for additional components that would consume power, thus achieving reliable data transmission with reduced power consumption
Data Source
AI summary
A DC-balanced signal is imposed on the input of a transmission line. Prior to imposing the DC-balanced signal, the input of the transmission line is held at an intermediate DC level that intermediate between the maximum and minimum DC levels of the DC-balanced signal. Alternatively, a compensating pulse is additionally imposed on the input of the transmission line. The compensating pulse compensates for a change in the DC level at the output of the transmission line caused by the imposing of the DC-balanced signal on the input of the transmission line.