RFID Voltage Supply Controller for Power Management
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Solution Overview
Problem
RFID devices face high power consumption due to continuous voltage supply to elements even when not connected to a host or not in use, leading to reduced battery life and increased energy expenditure.
Innovation Solution
A voltage supply controller is implemented in the RFID device to interrupt the battery voltage to elements such as the RF transceiver during disconnection from the host or when in sleep mode, while maintaining power to the microprocessor, using a switch circuit and capacitor to manage voltage levels and conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous voltage is supplied to all elements of the RFID device, then the device can operate immediately when needed, but power consumption increases and battery life decreases
Solution Approach 1:
The patent implements dynamic voltage control where the voltage supply state is changed based on operational conditions. A voltage supply controller dynamically switches between full voltage supply (when host is connected or communication is needed) and interrupted voltage supply (when host is disconnected or in sleep mode), allowing the device to adapt its power consumption to actual operational needs while maintaining readiness when required.
Solution Approach 2:
The patent employs periodic voltage supply to the RF transceiver through sleep modes. Instead of continuous voltage supply, the system periodically restores voltage to the RF transceiver based on whether the host is connected or communication is detected, reducing power consumption during idle periods while maintaining the ability to operate when needed.
2Use of energy by moving object
If voltage is interrupted to elements during sleep mode, then power consumption is reduced, but the device may not respond quickly when host connects
Solution Approach 1:
The patent maintains voltage supply to the microprocessor even in sleep mode when the host is disconnected. This preliminary action ensures that the microprocessor remains operational and can quickly detect when a host becomes connected, immediately restoring voltage to the RF transceiver and initiating communication without significant delay.
Solution Approach 2:
The voltage supply controller dynamically adjusts voltage supply based on real-time detection of host connection status. When the microprocessor detects host connection, it immediately restores voltage to the RF transceiver, ensuring quick response time while maintaining low power consumption during actual sleep periods when no host is present.
3Volume of moving object
If the RFID device is miniaturized and mobilized with embedded battery, then portability is improved, but power management becomes more critical and complex
Solution Approach 1:
The patent segments the voltage supply control for different elements of the RFID device. The voltage supply controller separately controls voltage supply to the microprocessor and RF transceiver, allowing independent power management of each component based on operational needs, thereby managing power consumption in a structured manner despite the increased complexity from miniaturization.
Solution Approach 2:
The voltage supply controller serves multiple functions: it manages voltage supply to different elements (microprocessor and RF transceiver), detects host connection status, controls sleep modes, and manages power consumption. This multi-functional approach consolidates power management complexity into a single controller, making the system more manageable despite miniaturization requirements.
Data Source
AI summary
A radio frequency identification (RFID) device and method for controlling power supply are provided. The RFID device controls power supply to its elements based on its connection with a host and its operation mode, thereby reducing power consumption.