NFC/RFID Wake-Up Power Circuit for Low-Standby Booting
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Solution Overview
Problem
There is a need for electronic devices to consume less energy, particularly in standby mode and when receiving radio frequency waves, as existing technologies do not efficiently manage energy consumption in these scenarios.
Innovation Solution
An electronic device with an antenna that receives radio frequency signals and powers a control unit using a voltage representative of the signal during booting, transitioning to a conventional power source once booted, and incorporating a conversion circuit and selection means to manage power supply modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the control unit remains powered continuously to enable immediate response to radio frequency signals, then the response speed is improved, but the energy consumption increases
Solution Approach 1:
The system performs preliminary action by keeping the control unit in a low-power standby state with essential circuits pre-configured, allowing rapid transition to full operation when a radio frequency signal is detected, thus achieving fast response without continuous full power consumption
Solution Approach 2:
The power supply mode of the control unit is made dynamic, switching between standby mode and active mode based on the presence of radio frequency signals. The system adapts its power consumption characteristics to match the operational requirements, consuming minimal power during idle periods and full power only when needed
2Use of energy by moving object
If the control unit is turned off during standby mode to reduce energy consumption, then the energy consumption is reduced, but the booting time increases when activation is needed
Solution Approach 1:
Essential booting components and configuration data are prepared in advance during the standby phase. When activation is needed, the control unit can resume operation by retrieving pre-loaded information rather than performing a complete cold boot, significantly reducing booting time while maintaining low power consumption during standby
Solution Approach 2:
Different parts of the control unit are treated differently during standby - critical real-time components remain in a low-power ready state while non-critical components are fully powered down. This selective power management reduces overall energy consumption while maintaining the ability to quickly activate essential functions
3Speed
If the antenna continuously monitors for radio frequency signals to enable immediate communication, then the communication responsiveness is improved, but the energy consumption increases
Solution Approach 1:
The antenna operates in periodic cycles, alternating between active signal monitoring phases and low-power standby phases. During standby, the antenna maintains minimal monitoring capability to detect wake-up signals, then enters deeper power-saving modes between active periods, achieving responsive communication while reducing average energy consumption
Solution Approach 2:
The antenna system incorporates self-service capabilities by automatically detecting the presence of radio frequency signals and triggering control unit activation without requiring continuous polling or external control signals, enabling the system to remain in low-power state until genuinely needed
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
This approach allows the control unit to remain powered only during necessary operations, reducing energy consumption during standby mode and enabling efficient booting without continuous power supply, thus optimizing energy usage in electronic devices.
Implementation Method 1
when the control unit is off and the antenna receives a radio frequency signal, the antenna delivers a first voltage representative of the radio frequency signal
Implementation Method 2
the voltage representative of the radio frequency signal is converted into a power supply voltage by a conversion circuit. the conversion circuit includes a voltage rectifying diode bridge
Data Source
AI summary
The present description concerns an electronic device having an antenna configured to receive a radio frequency signal. The electronic device further includes a control unit. The control unit is off, and the antenna receives a radio frequency signal. The antenna is configured to deliver a first voltage representative of the radio frequency signal to power the control unit with the voltage for the duration of the booting of the control unit.