USB Peripheral Voltage Detection for Backward Compatibility
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Solution Overview
Problem
USB 3.0 peripheral devices are not compatible with computer systems using earlier USB standards, leading to suboptimal performance, potential device failure, and increased manufacturing costs when a USB 3.0 host controller is required for backward compatibility.
Innovation Solution
A computer peripheral device with a device-end connecting interface, a control unit, and an impedance unit that determines the USB standard by detecting voltage levels on the ground drain pin, allowing it to adjust electrical characteristics and function optimally without a USB 3.0 host controller, using a power pin and ground drain pin for voltage generation and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a USB 3.0 host controller is added to ensure compatibility with USB 3.0 devices, then the adaptability of the computer system is improved, but the manufacturing cost increases
Solution Approach 1:
The peripheral device performs self-detection of the USB standard version by monitoring voltage levels on the ground drain pin, and automatically adjusts its electrical characteristics accordingly. This eliminates the need for the computer system to have a USB 3.0 host controller, as the peripheral device itself adapts to the connected standard (USB 2.0 or USB 3.0), thereby reducing manufacturing costs while maintaining adaptability.
2Reliability
If a USB 3.0 host controller is required for optimal performance, then the performance of USB 3.0 devices is improved, but the device complexity increases
Solution Approach 1:
The peripheral device dynamically adjusts its electrical characteristics based on the detected USB standard. By monitoring the voltage level on the ground drain pin, the device determines whether it is connected to a USB 2.0 or USB 3.0 port and modifies its impedance and power consumption accordingly, enabling optimal performance without requiring a USB 3.0 host controller.
3Stability of the object's composition
If the USB standard is determined in advance by the host controller, then the system stability is improved, but the adaptability to different USB standards deteriorates
Solution Approach 1:
The peripheral device uses feedback from the voltage level on the ground drain pin to determine the USB standard version. This feedback mechanism allows the device to automatically identify whether it is connected to USB 2.0 or USB 3.0 and adjust its operation accordingly, maintaining system stability while achieving adaptability to different USB standards without requiring the host controller to determine the standard in advance.
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 USB 3.0 devices to function optimally on systems with USB 2.0 or USB 3.0 standards, maximizing signal power and preventing device issues like noise or failure, while reducing manufacturing costs by eliminating the need for additional host controllers.
Implementation Method 1
a power pin, electrically connected to a power source of the computer system, generates a voltage level on a ground drain pin
Implementation Method 2
an impedance unit, electrically connected to the power pin and the ground drain pin respectively, decreases the voltage level of the ground drain pin optionally
Data Source
AI summary
A computer peripheral device, which is adapted to a computer system having a system-end connecting interface, includes a device-end connecting interface, an impedance unit and a control unit. The device-end connecting interface includes a power pin and a ground drain pin. The power pin electrically connects to a power source of the computer system and generates a voltage level on the ground drain pin. The impedance unit electrically connects to the power pin and ground drain pin of the device-end connecting interface respectively and decreases the voltage level of the ground drain pin optionally. The control unit electrically connects to the ground drain pin of the device-end connecting interface and determines a USB specification of the system-end connecting interface according to the voltage level of the ground drain pin.