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US 2020/0005108 A1Published application
Smartcard
AssigneeZwipe AS
InventorsJørgen FRANDSEN, Devin SNELL
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AssigneeZwipe AS
InventorsJørgen FRANDSEN, Devin SNELL
Estimating the term…
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.
A smartcard comprising:
A smartcard as claimed in any preceding claim, wherein the integrator circuit uses a field effect transistor with its source terminal connected to a high voltage terminal of the contact pad for connection to a high voltage terminal of the external power source, its gate arranged to be coupled via a feedback resistor to a low voltage terminal of the contact pad for connection to a low voltage terminal of the external power source, a feedback capacitor connected between the gate and the transistor's drain terminal, and the drain terminal providing voltage to the main circuit on-board the smartcard.
A smartcard as claimed in any preceding claim, wherein the main circuit on-board the smartcard includes a capacitance between the main voltage rails in order to store energy during contactless power harvesting.
A smartcard as claimed in any preceding claim, wherein the main circuit on-board the smartcard includes one or more of:
A smartcard as claimed in any preceding claim, including a biometric sensor on the smartcard for identification of an authorised user of the electronic card, wherein the smartcard is arranged to be fully operable only when the biometric sensor provides an indication of an authorised user.
A smartcard as claimed in any preceding claim, wherein the smartcard is an access card, a credit card, a debit card, a pre-pay card, a loyalty card and/or an identity card.
A smartcard as claimed in any preceding claim, wherein the smartcard is a financial card for interaction with an ATM machine.
A smartcard as claimed in any preceding claim, wherein the current limiting circuit is arranged to limit the current drawn via the contact pads to a maximum of 43 mA.
A smartcard as claimed in any preceding claim, the smartcard having a width of between 85.47 mm and 85.72 mm, a height of between 53.92 mm and 54.03 mm and a thickness less than 0.84 mm.
A method for manufacturing a smartcard, the method comprising:
Dependencies are inferred from the claim text.