Coupling Communication Circuit for Stable Differential Signal Hold
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Solution Overview
Problem
Conventional communication circuits using electromagnetic field coupling are limited in transmitting high-speed communication signals, as they cannot maintain a '1' or '0' signal and fail to handle differential outputs required for high-speed communication standards like PCI Express, SATA, and USB.
Innovation Solution
A communication circuit with a first buffer for outputting a signal indicative of a first or second logic state, a second buffer for outputting any one of the first, second, or a third logic state, and a monitoring circuit that detects no change in the logic state over a period to output the third logic state, enabling the transmission of differential outputs via electromagnetic field coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electromagnetic field coupling is used for wireless communication between modules, then data communication can be performed without physical connections, but the circuit cannot maintain continuous '1' or '0' signal transmission required for high-speed communication standards
Solution Approach 1:
The patent introduces a coupling circuit as an intermediary component between the wireless electromagnetic field coupling interface and the high-speed communication standard interface. This coupling circuit includes a first buffer for receiving differential signals, a second buffer for outputting differential signals, and a monitoring circuit that detects signal level changes. The coupling circuit translates the wireless communication protocol into a format compatible with high-speed communication standards like PCI Express, SATA, and USB, enabling both wireless operation and signal continuity.
2Device complexity
If conventional communication circuits are used for wireless communication, then simplicity is maintained, but versatility for different communication standards is limited
Solution Approach 1:
The coupling circuit is designed with universal functionality to support multiple high-speed communication standards including PCI Express, SATA, and USB. The monitoring circuit detects whether a signal level change has occurred, and based on this detection, controls the second buffer to output appropriate differential signals. This universal design allows the same circuit architecture to work across different communication protocols while maintaining compatibility with various interface standards.
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
Enables reliable data communication between LSIs adhering to high-speed communication standards by effectively transmitting and receiving differential outputs, enhancing versatility and accuracy in signal reproduction.
Implementation Method 1
a communication circuit (TLC (Transmission Line Coupler) circuit, a transmission line coupler) is provided between adjacent modules to perform wireless communication between modules by electromagnetic field coupling
Data Source
AI summary
A communication circuit includes a first buffer configured to output a signal indicative of a first logic state or a second logic state, a signal in which the first logic state and the second logic state are defined being input to the first buffer, a second buffer configured to output a signal indicative of any one of the first logic state, the second logic state, and a third logic state, the signal output from the first buffer being input to the second buffer, and a monitoring circuit configured to monitor a logic state indicated by the signal output from the first buffer and cause the second buffer, in a case where the logic state does not change during a first period, to output the signal indicative of the third logic state.