Chip Card Voltage Control for Fluctuating Contactless Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The internal supply voltage of chip cards is unstable due to unpredictable fluctuations in the external electromagnetic field strength during contactless transactions, leading to potential chip damage or transaction failures at POS terminals.
Innovation Solution
A software-based control circuit adjusts the internal supply voltage of chip cards by activating or deactivating a threshold voltage reduction based on sensor register readings, using predetermined switching thresholds to stabilize power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the internal supply voltage is reduced to enable operation in weak electromagnetic fields, then the chip can operate in low field conditions, but the chip may stall or fail when field strength fluctuates above the switching threshold
Solution Approach 1:
The patent implements dynamic adjustment of the internal supply voltage based on real-time electromagnetic field strength monitoring. The system continuously adapts the voltage level to match current field conditions, switching between reduced voltage for weak fields and normal voltage for strong fields, thereby resolving the contradiction between adaptability and reliability
Solution Approach 2:
The patent employs a feedback mechanism where the electromagnetic field strength is continuously monitored and used to control the supply voltage adjustment. The sensor register readings provide feedback that triggers voltage reduction when field strength is below the switching threshold and恢复正常 when above it, ensuring stable operation across varying field conditions
2Reliability
If the supply voltage is continuously monitored and adjusted based on field strength, then the chip can prevent damage and stalls, but the power management complexity increases
Solution Approach 1:
The patent implements self-service power management where the chip autonomously monitors its own electromagnetic field environment and automatically adjusts its supply voltage without external intervention. The embedded sensor and control logic enable the chip to self-regulate, protecting itself from damage while minimizing the need for complex external power management circuitry
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
The method ensures stable power supply to the chip, preventing stalls and damage, thereby increasing the likelihood of successful transactions despite fluctuating field strengths.
Implementation Method 1
chip cards or chip modules, into which a coil is integrated, and which are configured for contactless communication via an external electromagnetic field and are supplied by this field with the power required for their operation
Implementation Method 2
the chip has sensor registers, in which the current field strength of the external electromagnetic reading field detected by means of a sensor is stored
Data Source
AI summary
A method is implemented by a chip embedded in a chip card to adjust the internal supply voltage of the chip based on the strength of an external electromagnetic field that powers the chip. The internal supply voltage can be lowered by toggling a reduction in the threshold voltage. The chip includes a sensor register displaying a field strength value dependent on the external field strength and the adjusted internal supply voltage. Additionally, a corresponding computer program product, a storage medium containing the computer program product, a method for setting up the chip within the chip card using the storage medium to execute the method for adjusting the internal supply voltage, as well as a chip card featuring the chip, in which the method for adjusting the internal supply voltage of the chip is implemented, are also provided.