USB Type-C Resistor Switching for Channel Allocation
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Solution Overview
Problem
USB Type-C interfaces face compatibility issues due to differing device requirements for DP and USB bandwidth channels, and high-speed multiplexers increase overall cost.
Innovation Solution
A USB architecture that includes resistor switches to determine device orientation and allocate signal channels based on pin assignments, eliminating the need for high-speed multiplexers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If high-speed multiplexer is used to switch signals for USB Type-C forward and reverse plugging, then signal switching capability is improved, but overall cost increases
Solution Approach 1:
The patent replaces expensive high-speed multiplexers with inexpensive resistor switches that can be easily integrated into the USB Type-C interface. The resistor switches are simple, cost-effective components that achieve the same signal routing function without the high cost of traditional high-speed multiplexers, directly addressing the cost reduction goal while maintaining forward and reverse plugging capability
Solution Approach 2:
The patent substitutes the electrical signal switching mechanism (high-speed multiplexer) with a passive resistor-based switching system. This replacement eliminates the need for complex active signal switching components while achieving the same functional outcome through simpler resistive elements, reducing both cost and complexity
2Adaptability or versatility
If different devices are connected with different DP and USB bandwidth requirements, then device functionality is improved, but compatibility issues occur
Solution Approach 1:
The patent implements dynamic channel allocation where the USB Type-C interface can adaptively assign different bandwidth configurations based on the connected device's requirements. The system can switch between 4-channel DP mode, 2-channel DP mode, and hybrid modes combining DP and USB channels, allowing the interface to dynamically adjust to match the specific needs of each device while maintaining compatibility across different device types
Solution Approach 2:
The patent changes the operational parameters of the signal transmission channels by configuring resistor switches to establish different resistance dividers that correspond to different bandwidth allocation modes. By adjusting the resistance values and switch configurations, the system can transform the same physical interface into multiple functional modes (4 DP channels, 2 DP+2 USB, etc.), enabling compatibility with devices having different bandwidth requirements
Data Source
AI summary
A universal serial bus (USB) Type-C interface architecture includes a USB plug, a USB socket, a power delivery controller, a first pin, a second pin, a first resistor switch, a second resistance switch, a third resistance switch and a fourth resistance switch. The first pin includes a first end coupled to the USB plug, and a second end coupled to the power delivery controller. The second pin includes a first end coupled to the USB plug, and a second end coupled to the power delivery controller. The first resistance switch controls the connection between a first resistor and the first pin. The second resistor switch controls the connection between a second resistor and the first pin. The third resistor switch controls the connection between a third resistor and the second pin. The fourth resistor switch controls the connection between a fourth resistor and the second pin.