Smart Card DC-to-DC Voltage Converter for Power Loss Reduction
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Solution Overview
Problem
Contactless smart cards face inefficiencies in energy transfer from their antennas to components due to limited energy reception, resulting in significant power losses through existing supply paths.
Innovation Solution
Incorporating a capacitive or inductive DC-to-DC voltage converter into the smart card's supply path to efficiently convert and stabilize the received electromagnetic signal into a usable supply voltage, reducing power losses and enhancing energy delivery to components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional supply paths are used in contactless smart cards, then device simplicity is maintained, but energy transfer efficiency deteriorates with significant power losses
Solution Approach 1:
The patent changes the electrical parameters in the supply path by introducing a DC-to-DC voltage converter that transforms the rectified voltage into a regulated supply voltage. This parameter transformation enables efficient energy transfer by matching impedance and regulating voltage levels, directly reducing power losses while managing the increased circuit complexity through integrated design
Solution Approach 2:
The DC-to-DC voltage converter acts as an intermediary component between the antenna and the smart card components. It mediates the energy transfer by receiving rectified voltage from the antenna and providing regulated voltage to the components, thereby optimizing power delivery and reducing losses in the supply path
2Use of energy by moving object
If limited electromagnetic energy is received by the antenna, then contactless operation is enabled, but energy availability to components deteriorates
Solution Approach 1:
The DC-to-DC voltage converter transforms the limited rectified voltage from the antenna into a regulated supply voltage with optimized current delivery. By changing voltage and current parameters through efficient conversion, the system maximizes energy availability to components while minimizing power losses in the supply path
Solution Approach 2:
The voltage converter implements feedback control to regulate the supply voltage based on the rectified input voltage. This feedback mechanism ensures optimal energy transfer by adjusting conversion parameters to match the available electromagnetic energy, thereby maximizing energy availability while minimizing losses
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 implementation of a DC-to-DC voltage converter significantly increases the efficiency of energy transfer, providing a supply current that is several times greater than traditional methods, thereby improving the overall power delivery to smart card components.
Implementation Method 1
an antenna 101, which is configured to receive an electromagnetic signal
Implementation Method 2
a rectifier 104, which is configured to rectify the received signal
Implementation Method 3
a capacitive or an inductive DC-to-DC voltage converter 203, which is configured to provide a supply voltage on the basis of the rectified signal
Data Source
AI summary
In accordance with various embodiments, a smart card is described which has an antenna, which is configured to receive an electromagnetic signal, a rectifier, which is configured to rectify the received signal, and a capacitive or an inductive DC-to-DC voltage converter, which is configured to provide a supply voltage on the basis of the rectified signal.