Smart card and power supply switching circuit of smart card

A power switching and smart card technology, applied in the field of smart cards, can solve problems such as the inability to meet the power supply requirements and the unstable operation of the smart card system.

Pending Publication Date: 2019-11-26
SHENZHEN EXCELSECU DATA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a smart card and a power switching circuit for the smart card, aiming to solve the problem that the traditional tec

Method used

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  • Smart card and power supply switching circuit of smart card
  • Smart card and power supply switching circuit of smart card
  • Smart card and power supply switching circuit of smart card

Examples

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] figure 1 A schematic structural diagram of the power switching circuit of the smart card provided by the preferred embodiment of the present invention is shown. For the convenience of description, only the parts related to this embodiment are shown, and the details are as follows:

[0025] like figure 1 As shown, the power switching circuit 1 of the smart card is connected to the load 2 of the smart card, and the power switching circuit 1 of the smart card includes a 7816 contact 10, an NFC antenna 20, a first voltage conversion unit 30, a second voltage conversion unit 40 and a switching u...

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Abstract

The invention belongs to the technical field of smart cards, and provides a smart card and a power supply switching circuit of the smart card. The power supply switching circuit of the smart card is connected with the load of the smart card, and comprises: a 7816 contact configured to electrically connect with a contact reader for communication; an NFC antenna configured to wirelessly communicatewith an NFC reader; a first voltage conversion unit which is connected with the 7816 contact and is configured to convert the contact voltage output by the 7816 contact into a first voltage; a secondvoltage conversion unit which is connected to the NFC antenna and configured to convert an antenna voltage output by the NFC antenna into a second voltage; and a switching unit which is respectively connected with the first voltage conversion unit and the second voltage conversion unit and configured to select the first voltage or the second voltage to supply power to the load.

Description

technical field [0001] The invention belongs to the technical field of smart cards, in particular to a smart card and a power switching circuit of the smart card. Background technique [0002] Near Field Communication (NFC) is a short-distance high-frequency radio technology that operates at a frequency of 13.56MHz and has three transmission speeds of 106Kbit / s, 212Kbit / s or 424Kbit / s. At present, NFC has passed the ISO / IEC 18092 international standard, ECMA-340 standard and ETSI TS 102 190 standard. 7816 is the smart card standard ISO / IEC 7816 published by the International Organization for Standardization, which specifies the relevant specifications of contact smart cards, including physical characteristics, interface specifications, transmission protocols and command exchange formats. The 7816 contact is the physical interface of the standard and is also a smart card Contact physical interface with the outside world. [0003] For smart cards with 7816 contacts and NFC e...

Claims

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Application Information

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IPC IPC(8): H02J9/06G06K19/07
CPCG06K19/0701H02J9/061G06K19/07H02J9/06
Inventor 陈柳章
Owner SHENZHEN EXCELSECU DATA TECH
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