External power supply system, apparatus and method for smart card
AssigneeBellSouth Intellectual Property Corporation
InventorStephen P. Norton
Life of this patent
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Abstract
Disclosed is a system for providing an external electrical power supply to a proximity smart card for driving the internal electronics of the smart card. The external electrical power supply is separate from a power source of a smart card reader or an internal battery. The external power supply energizes the smart card by way of magnetic induction by radiating power over an electromagnetic link between the external power supply and the smart card.
Claims13
A smart card power supply system, comprising:
- a smart card having an antenna for receiving electromagnetic energy;
- and
- a portable power supply in wireless electromagnetic communication with the smart card;
- and
- a smart card reader including a power supply electromagnetically coupled to the smart card;
- wherein the portable power supply generates electromagnetic energy for energizing the smart card;
- and
- wherein the electromagnetic energy is radiated from the portable power supply to the smart card.
A smart card power supply system, comprising:
- a smart card having an antenna for receiving electromagnetic energy;
- and
- a portable power supply in wireless electromagnetic communication with the smart card;
- wherein the portable power supply generates electromagnetic energy for energizing the smart card;
- wherein the electromagnetic energy is radiated from the portable power supply to the smart card;
- and
- wherein the portable power supply is enabled upon receiving an external electromagnetic signal.
A method of supplying power to a smart card from a portable power supply, comprising:
- generating a first electromagnetic signal having a first frequency;
- and
- wirelessly radiating the first electromagnetic signal to a smart card tuned to the first frequency from a portable power supply ohmically detached from a smart card and a smart card reader.
A portable power supply for a smart card, comprising:
- a battery ohmically detached from a smart card and a smart card reader;
- an oscillator in communication with the battery;
- and
- an antenna coupled to the oscillator.
Dependencies are inferred from the claim text.