USB 3.0 Host Power Control via Dynamic Super Speed Circuit Switching
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Solution Overview
Problem
USB 3.0 hosts unnecessarily consume power as their super speed circuits remain always turned on, regardless of whether a USB 3.0 or non-USB 3.0 peripheral device is connected, leading to wasteful energy expenditure.
Innovation Solution
Incorporating a control module that turns off the super speed circuit by default and only activates it when a USB peripheral device is connected, transmitting a reset signal to facilitate communication according to the device's specifications, thereby conserving power by ensuring the super speed circuit is only active when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the super speed circuit is always turned on to support USB 3.0 functionality, then the host can communicate with USB 3.0 peripheral devices at high speed, but power consumption increases unnecessarily when only USB 2.0 devices are connected
Solution Approach 1:
The patent applies dynamics by making the super speed circuit's operational state changeable rather than fixed. The control module dynamically switches the super speed circuit between on and off states based on detection results, allowing the system to adapt its power consumption level to the actual communication needs.
Solution Approach 2:
The system performs self-detection through the control module that automatically identifies whether a USB 3.0 or USB 2.0 device is connected and autonomously decides whether to activate the super speed circuit, eliminating the need for manual intervention or continuous high-power operation.
2Speed
If the super speed circuit is always turned on to ensure USB 3.0 functionality, then high speed transmission is available, but energy is wasted when USB 2.0 devices are connected
Solution Approach 1:
The patent makes the transmission speed capability dynamic by conditionally activating the super speed circuit. When a USB 3.0 device is detected, the circuit enables high-speed transmission; when only USB 2.0 devices are present, it deactivates to prevent energy loss, thus adapting the speed capability to actual requirements.
Solution Approach 2:
The system changes the operational parameter of the super speed circuit (on/off state) based on the detected device type. This parameter change allows the system to switch between high-speed and low-power modes, optimizing both transmission speed and energy efficiency according to the connected peripheral.
3Ease of operation
If the super speed circuit remains active by default, then USB 3.0 devices can be immediately used, but power is consumed even when no USB 3.0 devices are connected
Solution Approach 1:
The control module performs preliminary detection upon device connection to identify whether a USB 3.0 peripheral is present before activating the super speed circuit. This preliminary action ensures that the circuit is only activated when needed, preventing idle power consumption while maintaining readiness for USB 3.0 operation.
Solution Approach 2:
The system implements feedback through the control module that continuously monitors the connection status and device type, then adjusts the super speed circuit state accordingly. This feedback mechanism ensures power is consumed only when USB 3.0 devices are actually connected and being used.
Data Source
AI summary
A USB 3.0 host with low power consumption includes a super speed circuit, a non-super speed circuit, and a control module. The super speed circuit is used for transmitting data at a first transmission speed. A default state of the super speed circuit is turning-off. The non-super speed circuit is used for transmitting data at a second transmission speed, a third transmission speed, or a fourth transmission speed. The first transmission speed is faster than the second transmission speed, the third transmission speed, and the fourth transmission speed. The control module is used for detecting whether a USB peripheral device is connected to the USB 3.0 host, and controlling turning-on and turning-off of the super speed circuit.