Unlock instant, AI-driven research and patent intelligence for your innovation.

Remotely powered contactless cards

A non-contact, current technology, applied in the direction of electrical components, circuit devices, record carriers used by machines, etc., which can solve problems such as errors, terminals incorrectly interpreted as card responses, etc.

Active Publication Date: 2020-03-17
STMICROELECTRONICS SRL
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a change may be incorrectly interpreted by the terminal as a response from the card, which results in an error

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Remotely powered contactless cards
  • Remotely powered contactless cards
  • Remotely powered contactless cards

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The same elements are designated with the same reference numerals in different figures. For purposes of clarity, only those elements that are useful for understanding the described embodiments are shown and described in detail.

[0026] Figure 2A is a simplified representation of an embodiment of a remotely powered contactless card 100 . An antenna 9 is coupled to the input of a rectifier 13 . The output of rectifier 13 is coupled via conductor 30 to a data processing unit 32 which is coupled to card ground. Circuitry 34 is coupled to card ground, conductor 30 and data processing circuitry 32 .

[0027] The circuit 34 is a current regulation circuit capable of sampling a regulated current I1 from the conductor 30 so that the current I2 supplied by the rectifier is constant during the phase P2 mentioned above, the current I2 being the difference between the current I1 and the current I3 consumed by the data processing circuit sum.

[0028] The circuit 34 can be act...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present disclosure relates to remotely powered contactless cards. The contactless card is powered by an antenna connected to the input of the rectifier. The output of the rectifier is coupled to a processing unit that consumes the first current output from the rectifier. A current regulation circuit is connected to the output of the rectifier. The current regulation circuit operates to sink the second current from the output of the rectifier such that the sum of the first current and the second current is a constant current.

Description

[0001] priority claim [0002] This application claims the benefit of priority from French Patent Application No. 1556345 filed July 3, 2015, the content of which is hereby incorporated by reference in its entirety to the fullest extent permitted by law. technical field [0003] The present disclosure relates to remotely powered contactless cards, that is cards intended to exchange data with the terminals from which they draw their power supply. Background technique [0004] Figure 1A A remotely powered contactless card 1 is shown arranged near a terminal 3 . The terminal 3 comprises an antenna 5 and an electronic circuit 7 . The contactless card 1 comprises an antenna 9 connected to a data processing unit 11 via a rectifier 13 . Unit 11 and the rectifier are connected to the ground of the card. [0005] Terminals emit a field permanently. Thus, when the card is close to the terminal, it is powered by the antenna 9 and is able to receive signals 15 and transmit signal...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06K19/07G06K19/077
CPCG06K19/0707G06K19/07749H02J50/20H02J50/80H02J50/10
Inventor J·谷利尔
Owner STMICROELECTRONICS SRL