Single-Wire Current Conveyor Link for Capacitive Load Limits
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Solution Overview
Problem
High-speed data transmission over long distances is hindered by line capacitance, which causes signal distortion, attenuation, and phase delay due to capacitive load, limiting the effectiveness of existing wired communication techniques like MIPI, LVDS, USB2.0, USB3.0, and SATA.
Innovation Solution
A single-wire communication system utilizing current conveyors that transmit signals as current rather than voltage, reducing the impact of capacitive load and enabling high-speed data transmission over long distances by converting voltage signals to current signals and vice versa, while also reducing the number of pins required for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If voltage-based signal transmission is used in wired communication, then communication speed can be increased, but line capacitance causes signal distortion, attenuation, and phase delay
Solution Approach 1:
The patent replaces voltage-based signal transmission with current-based signal transmission. By using current conveyors, the system substitutes the conventional voltage-driven electrical signal mechanism with a current-driven mechanism, where signals are transmitted as current variations rather than voltage variations. This fundamental substitution eliminates the capacitive loading effects that plague voltage-based systems, as current signals are not affected by line capacitance in the same way voltage signals are.
Solution Approach 2:
The patent changes the fundamental parameter used for signal transmission from voltage to current. Instead of modulating voltage levels to encode data, the system modulates current levels through the use of current conveyors. This parameter change transforms the transmission characteristic, allowing high-speed communication over long distances without the signal degradation caused by capacitive effects in voltage-based systems.
2Device complexity
If the number of communication pins is reduced to decrease device complexity, then manufacturing cost decreases, but signal transmission capability may be compromised
Solution Approach 1:
The patent makes the single communication wire universal by enabling it to handle multiple functions: bidirectional data transmission, clock signaling, and control operations. The current conveyor-based interface allows the same physical wire to carry different types of signals in different time slots or directions, eliminating the need for separate dedicated wires for each function that would otherwise be required in traditional voltage-based interfaces.
Solution Approach 2:
The patent merges multiple communication functions into a single wire interface. By combining data transmission, clock synchronization, and control signaling into one unified current-based communication channel, the system eliminates the need for multiple separate pins and wires, thereby reducing device complexity while maintaining full communication capability.
3Use of energy by moving object
If voltage amplitude is reduced to minimize capacitive load effect, then power consumption decreases, but signal transmission distance is limited
Solution Approach 1:
The patent substitutes voltage-based signal propagation with current-based signal propagation. Since current signals are not subject to capacitive loading in the same manner as voltage signals, the system can maintain signal integrity over long transmission distances without requiring high voltage amplitudes. The current conveyors ensure that the signal strength is maintained through active current replication rather than passive voltage propagation.
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
This approach allows for high-speed serial communication with reduced power consumption and increased price competitiveness by minimizing voltage amplitude and eliminating capacitive load interference, enabling efficient data transmission through a single wire.
Implementation Method 1
The first communication module converts the first transmitted voltage signal into a first transmitted current signal and outputs it to the second communication module via the single-wire. The second communication module converts the first transmitted current signal received via the single-wire into a voltage to restore the first transmitted voltage signal.
Data Source
AI summary
A single-wire communication system and a control method of the single-wire communication system are disclosed. A single-wire communication system includes a single-wire, a first communication module and a second communication module. The first communication module includes a plurality of current conveyors so as to communicate high-speed signals only with current freely from a capacitive load of the single-wire. The first communication module is connected to one side of the single-wire. The second communication module includes a plurality of current conveyors so as to communicate high-speed signals only with current freely from a capacitive load of the single-wire. The second communication module is connected to another side of the single-wire.