USB Detection Circuit Merging Switch and Sensor Units
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Solution Overview
Problem
Existing USB detection circuits require multiple components to determine the connection state of USB ports, leading to increased hardware costs and complexity.
Innovation Solution
A detection circuit for USB ports that uses a single circuit with a switch unit and detection unit, employing two configuration channel pins to alternately provide voltage levels, allowing for state detection and reducing hardware costs by determining coupling conditions using a single circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple detection circuits are used to detect voltage levels of configuration channel pins, then detection accuracy is improved, but hardware cost and circuit complexity increase
Solution Approach 1:
The patent combines multiple detection functions into a single detection circuit by using a multiplexer to sequentially switch between different configuration channel pins. This allows one detection circuit to perform the work of multiple separate circuits, reducing hardware complexity while maintaining detection accuracy through sequential measurement of each pin's voltage level.
Solution Approach 2:
The detection circuit operates by periodically switching between different configuration channel pins in a sequential manner. The control unit alternates between connecting different pins to the detection circuit, allowing periodic detection of each pin's state. This time-division approach enables accurate detection of multiple pins using a single circuit resource.
2Reliability
If multiple detection circuits are used to detect port connection states, then reliability of detection is improved, but hardware cost increases
Solution Approach 1:
The patent merges multiple detection circuits into one by implementing a shared detection circuit that uses a multiplexer to selectively connect different configuration channel pins. This reduces the quantity of hardware components while maintaining reliable detection through sequential measurement of each pin's voltage level to determine connection states.
Solution Approach 2:
The single detection circuit is designed to be universal by incorporating a multiplexer that allows it to detect multiple different configuration channel pins. This multi-functional design enables one circuit to perform the detection tasks that would otherwise require multiple dedicated circuits, reducing hardware quantity while maintaining comprehensive detection capability.
3Ease of repair
If separate detection circuits are used for each configuration channel pin, then ease of debugging is improved, but overall circuit complexity increases
Solution Approach 1:
The patent segments the detection function by allowing the multiplexer to independently select and connect different configuration channel pins to the single detection circuit. This segmentation enables separate testing and debugging of each pin's connection state while using a unified detection circuit, simplifying the overall structure while maintaining ease of debugging for individual pins.
Data Source
AI summary
A detection circuit of Universal Serial Bus (USB) is provided. A port of the USB has a first configuration channel pin and a second configuration channel pin, and the first and second configuration channel pins are disposed on opposite sides. The detection circuit includes a switch unit and a detection unit. The switch unit is coupled to the first and second configuration channel pins to sequentially provide a first voltage level of the first configuration channel pin and a second voltage level of the second configuration channel pin. The detection unit is coupled to the switch unit and correspondingly provides a state reference signal according to the first and second voltage levels.