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Smartcard

A smart card, power technology, applied in the field of smart cards, can solve problems such as possible difficulties in interaction

Active Publication Date: 2019-11-15
ZWIPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Implementing sufficiently high power circuitry for power harvesting while also managing the interaction between the smart card and the power supply coupled to the contact pads can be difficult

Method used

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Examples

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Embodiment Construction

[0029] By way of example, the invention is described in the context of a fingerprint-authorized smart card that includes contactless technology and uses power harvested from a card reader. will understand, figure 2 The advantages of the current limiting circuit can also be applied to smart cards without biometric sensors.

[0030] figure 1 The architecture of an example contactless smart card 102 is shown, which may be provided with power from the contact pads via a suitable electrical connection to the power line (eg at A or B). By adding a connection to the contact pad via a current limiting circuit, figure 1 The smart card 102 of ® is operable with either contactless power harvesting or contact-based power supply. figure 2 Another somewhat simplified architecture for a smart card 102 including a current limiting circuit C is shown. This circuit C can be coupled to figure 1 main circuit to provide the required contact pad connections. figure 2 The current limiting c...

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Abstract

A smartcard (102) comprises contact pads for electrical connection to an external power source for provision of power to the smartcard in a contact mode of the smartcard; a contactless power harvesting system (108, 126) for provision of power to the smartcard in a contactless mode of the smartcard; and a main circuit on-board the smartcard for receiving and managing the power provided from the contact pads or from the contactless power harvesting system wherein the main circuit includes components requiring power in order to provide the smartcard with required functionality; and wherein the main circuit is connected to the contact pads via a current limiting circuit (C) for controlling the levels of current drawn via the contact pads, the current limiting circuit comprising an integrator.

Description

technical field [0001] The invention relates to a smart card and a corresponding method for manufacturing the smart card. Background technique [0002] A smart card is an electronic card capable of storing data and interacting with a user and / or external devices, for example via contactless technologies such as RFID. These cards can interact with sensors to communicate information to enable access, authorize transactions, and more. Smart cards include, for example, access control cards, credit cards, debit cards, prepaid cards, loyalty cards, ID cards, and the like. [0003] A known feature of these smart cards are the contact pads, which can be coupled to corresponding electrical contacts, usually in the terminal or card reader device. Electrical connections to the contact pads can be used for data communication and also for powering internal circuitry on the smart card. Accordingly, financial type smart cards such as credit or debit cards are designed to draw current fr...

Claims

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Application Information

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IPC IPC(8): G06K19/07G06K19/077
CPCG06K19/0715G06K19/07769G06K19/0708G06K19/0701G06K19/0709G06K19/0716G06K19/0718G06K19/0723
Inventor 乔根·弗兰森德文·斯内尔
Owner ZWIPE
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