USB-C Controller Multiplexer for Signal Integrity
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Solution Overview
Problem
Current USB type-C solutions lack a single integrated circuit that can provide reverse detection, multiplexing for flip correction, and electrostatic discharge protection, leading to the need for external components, which degrades high-speed signaling and increases costs.
Innovation Solution
A USB-C controller implemented as a single integrated circuit with a multiplexer, low-voltage n-type field-effect transistors, and integrated electrostatic discharge protection, enabling communication with multiple protocols and providing short-circuit protection, thereby eliminating the need for external components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external components are used for reverse detection, multiplexing, and electrostatic discharge protection, then device functionality is achieved, but signal integrity deteriorates and cost increases
Solution Approach 1:
The patent combines reverse detection circuitry, multiplexing functionality, and electrostatic discharge protection into a single integrated USB Type-C controller chip. This eliminates the need for multiple external components, thereby improving signal integrity by reducing connection interfaces and lowering system cost.
Solution Approach 2:
The integrated controller performs multiple functions simultaneously: it handles reverse detection, protocol multiplexing (USB 2.0, USB 3.0, and alternate modes), and electrostatic discharge protection. This multi-functional integration reduces the overall system complexity and component count while maintaining comprehensive functionality.
2Adaptability or versatility
If multiple external components are used, then all required functions are implemented, but system cost increases
Solution Approach 1:
The controller is designed to support multiple communication protocols (USB 2.0, USB 3.0, and alternate modes) within a single integrated circuit. This eliminates the need for separate external components for each protocol, thereby reducing system cost while maintaining comprehensive protocol support and adaptability.
3Reliability
If external components are used for protection functions, then device protection is provided, but signal quality degrades
Solution Approach 1:
The electrostatic discharge protection circuitry is integrated directly into the USB Type-C controller chip, eliminating the need for external protection components. This integration ensures that protected signals remain on-chip throughout their path, preventing signal quality degradation that would occur at external connection interfaces while maintaining comprehensive device protection.
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 solution enables high-speed signaling, reduces costs, and enhances signal integrity by integrating all necessary functions within a single chip, improving the efficiency and reliability of USB type-C connections.
Implementation Method 1
A series of cascaded, low-voltage n-type field-effect transistors may be coupled between the multiplexer and each terminal of the third pair of terminals to provide short-circuit protection
Data Source
AI summary
A USB-C controller, disposed on an integrated circuit (IC), comprises a first pair of terminals to communicate with a first communication protocol that is other than USB, a second pair of terminals to communicate with a second communication protocol that is other than USB, and a third pair of terminals, each of which is to be coupled to a corresponding SBU1 terminal or SBU2 terminal of a Type-C receptacle. The USB-C controller further includes: a multiplexer to selectively couple the first pair of terminals to the third pair of terminals and the second pair of terminals to the third pair of terminals: and logic to control the multiplexer according to a mode enabled within a configuration channel (CC) signal.