NFC Power Supply Circuit for Simultaneous Secure Element Startup
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Solution Overview
Problem
Existing near field communication (NFC) devices face challenges with power consumption, startup speed, and overall performance, necessitating improvements in their design and operation.
Innovation Solution
The implementation of a method and electronic device architecture that includes a universal integrated circuit card, a secure element, and a near field communication module, where a voltage detector controls the power supply circuit to manage power sources and transition the device from standby to active state efficiently, ensuring simultaneous startup of components and software.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the NFC module transitions from standby to active state by starting all components and software sequentially, then the device ensures stable operation, but the startup time increases and power consumption rises
Solution Approach 1:
The patent applies preliminary action by pre-configuring the power supply circuit with a voltage detector that can immediately detect voltage presence when the NFC module transitions from standby to active state. This allows the system to skip unnecessary sequential startup steps and directly activate only the required components, thereby reducing both startup time and power consumption while ensuring stable operation.
2Speed
If the power supply circuit provides additional power sources to the secure card or element, then the startup speed improves, but the device complexity increases
Solution Approach 1:
The patent implements universality by designing a multi-functional power supply circuit that can provide both the first power source (detected by the voltage detector) and the additional second power source to the secure card or element. This integrated approach allows a single power supply circuit to handle multiple power provisioning scenarios, improving startup speed without proportionally increasing overall device complexity.
3Reliability
If the voltage detector continuously monitors the first supply voltage, then the reliability of power detection improves, but the power consumption increases
Solution Approach 1:
The patent applies periodic action by implementing a voltage detector that monitors the first supply voltage at critical transition moments (when the NFC module changes from standby to active state) rather than continuously. This periodic monitoring approach maintains reliable voltage detection for power management decisions while significantly reducing power consumption compared to continuous monitoring.
Data Source
AI summary
The present disclosure relates to a method for powering an electronic device. The electronic device includes at least one universal integrated circuit card or at least one secure element; at least one power supply circuit for said card or secure element; and at least one near field communication module. When the near field communication module changes from a standby or inactive state to an active state, the following successive operations are performed: —the components and circuits of said electronic device are started; —programs of the electronic device and said secure card or element are started at the same time.