Configurable A/V PHY Circuit for Multi-Protocol Signaling Conversion
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Solution Overview
Problem
The physical electrical signaling incompatibility between different digital audio and video interface protocols, such as DisplayPort, HDMI, and DVI, poses a challenge for multi-protocol interfacing and switching in consumer electronics devices.
Innovation Solution
The development of integrated semiconductor circuits with configurable receiver and driver circuits that can convert and switch between various digital A/V signaling formats at the physical layer, including AC- and DC-coupling and source termination schemes, enabling universal signaling format conversion and multiplexing/de-multiplexing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different digital interface protocols (DVI, HDMI, DisplayPort) are used for interfacing, then device compatibility and functionality are improved, but physical electrical signaling incompatibility prevents direct interfacing
Solution Approach 1:
The patent introduces a universal internal signaling format that acts as an intermediary between different external interface protocols. External signals from DVI, HDMI, or DisplayPort are converted to this universal internal format, which then drives the display device. This mediator format resolves the electrical signaling incompatibility between different protocols while maintaining device compatibility.
Solution Approach 2:
The patent employs configurable receiver and driver circuits that can dynamically change their electrical signaling parameters to match different external protocols. The receiver circuits can be configured to accept different voltage levels, impedance values, and signaling schemes, while the driver circuits can output signals in the required format. This parameter adaptability allows a single device to interface with multiple protocols without requiring separate dedicated circuits for each protocol.
2Reliability
If separate dedicated circuits are used for each interface protocol, then protocol-specific performance is optimized, but device integration and cost increase
Solution Approach 1:
The patent designs receiver and driver circuits with universal functionality that can handle multiple interface protocols through configuration rather than requiring separate dedicated circuits for each protocol. The same physical circuit infrastructure can be programmed or configured to support DVI, HDMI, DisplayPort, or other protocols, reducing the number of components needed and simplifying manufacturing while maintaining protocol-specific performance through proper signal conditioning.
Solution Approach 2:
The patent merges multiple protocol-specific receiver and driver functions into unified circuit blocks that can operate with different protocols. By combining the functionality of what would traditionally be separate dedicated circuits into single multi-functional units, the design reduces component count, simplifies integration, and lowers manufacturing costs while maintaining the ability to optimize performance for each protocol through configuration.
3Measurement precision
If protocol-specific receiver and driver circuits are used, then signaling accuracy is improved, but device complexity and switching capability are reduced
Solution Approach 1:
The patent implements dynamic configuration capability in the receiver and driver circuits, allowing them to adapt their electrical characteristics and signaling parameters based on the detected external protocol. Rather than being fixed for a single protocol, these circuits can dynamically adjust their operating parameters to maintain signaling accuracy across multiple protocols while enabling multi-protocol switching functionality.
Data Source
AI summary
A circuit includes a configurable receiver circuit, a multiplexer or demultiplexer coupled to the configurable receiver circuit, and a configurable driver circuit coupled to the multiplexer or demultiplexer. The configurable receiver circuit generates an internal format signal which is received by the multiplexer or demultiplexer. The configurable driver circuit receives the internal format signal from the multiplexer or demultiplexer.