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

Method and apparatus for synchronizing signals within a contactless device

A non-contact, equipment technology, applied in the direction of synchronization device, read/write/query/recognition near-field transmission system, multi-frequency code system, etc., can solve the problem of increasing power consumption

Active Publication Date: 2021-09-10
STMICROELECTRONICS (GRENOBLE 2) SAS
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Also, this synchronization outside the frame requires an external clock reference, which increases power consumption

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
  • Method and apparatus for synchronizing signals within a contactless device
  • Method and apparatus for synchronizing signals within a contactless device
  • Method and apparatus for synchronizing signals within a contactless device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0064] exist figure 1 In the reference app represents a communication device, for example, a cellular mobile phone equipped with antenna ANT1 for establishing a telephone communication.

[0065] In current cases, the apparatus APP also includes, for example, a NFC type non-contact communication device CMP. The device can be, for example, a NFC type non-contact electronic chip.

[0066] In this case, it is assumed that the host device app is simulated in the card mode. In a conventional manner, the device CMP has two contacts Tx1 and Tx2 and the other two contacts RX1 and RX2.

[0067] Antenna ANT2 (eg, inductive windings) can be used to communicate with an external reader RD.

[0068] The first terminal of the antenna ANT2 is connected to the contacts Tx1 and Rx1, and the other terminal of the antenna Ant2 is connected to the contacts Tx2 and Rx2.

[0069] Contacts TX1 and TX2 form two output terminals for device DIS, for transmitting data to antenna ANT2, while contacts RX1 and R...

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

Embodiments of the invention relate to methods and devices for synchronizing signals within a contactless device. A contactless communication device is capable of communicating with a reader in a contactless manner by using active load modulation. After each frame is a receive cycle. The antenna is configured to receive the reader signal during each receive cycle, and to receive the reader carrier signal and transmit the modulated device carrier signal to the reader during each frame. The processor is configured to perform a first synchronization between the device in each receive cycle from a signal in the reader signal received at the antenna and a device carrier clock signal generated in the device. The processor is further configured to perform a modulated device carrier signal suppression process to obtain a processed signal and to perform a second synchronization between the processed signal and the device carrier clock signal within each frame.

Description

[0001] Cross-reference [0002] This application claims the French patent application serial number on January 15, 2018 filed 1850293 priority, which is incorporated by reference herein. Technical field [0003] Applications and embodiments of the present invention relates to a method and apparatus for non-contact device synchronization signal. Background technique [0004] NFC acronym denotes a short distance in a short distance of 10cm, for example, the exchange of data between two non-contact high-frequency wireless communication technology equipment. [0005] NFC technology is standardized in ISO / IEC 18092, ISO / IEC 21481 and NFC Forum documents, but incorporating Type A and Type B protocols include ISO / IEC 14443 standard, a series of pre-existing standards. [0006] A protocol for example by using such non-contact communication protocol such as ISO / IEC 14443 standards, NFC devices can usually be used in another non-contact device to interact with the reader or the car...

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): H04B5/00H04L7/033H04L27/26
CPCH04L27/2656H04L27/2657H04L27/2662H04L27/2695H04L7/033H04B5/77H04B5/45H04B5/26H04B5/72H04W4/80H04L7/02H04L27/148
Inventor P·格拉富利埃B·帕耶
Owner STMICROELECTRONICS (GRENOBLE 2) SAS