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NFC (near field communication) cellphone circuit system based on self-adaptive matching circuit

A mobile phone circuit system, self-adaptive matching technology, applied in the direction of telephone structure and other directions, can solve the problems of unable to cover all frequency bands, mobile phone can not be brushed POS machine, etc., to achieve the effect of expanding the scope

Active Publication Date: 2015-04-29
KUNSHAN RUIXIANG XUNTONG COMM TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing NFC mobile phones cannot cover all frequency bands within 13MHz-17MHz due to technical bottlenecks, and existing POS machines have multiple operating frequencies, so it is often encountered that the mobile phone cannot scan the POS machine

Method used

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  • NFC (near field communication) cellphone circuit system based on self-adaptive matching circuit

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Embodiment Construction

[0017] The present invention will be further described below with reference to specific embodiments.

[0018] see figure 1 As shown, the NFC mobile phone circuit system based on the adaptive matching circuit of the present invention includes an NFC chip circuit 1, a filter circuit 2, a matching circuit 3 and an antenna circuit 4 connected in sequence, and the NFC chip circuit 1 is further connected with the antenna circuit 4. , the NFC chip circuit 1 includes an NFC chip, a variable capacitor C0 and a current management control circuit are further connected between the matching circuit 3 and the antenna circuit 4, the variable capacitor C0 and the output end of the matching circuit 3 connected in parallel, the capacitance value of the variable capacitor C0 ranges from 1 to 20pf, and the current management control circuit is connected to the variable capacitor C0. In this embodiment, the current management control circuit includes a current mode control chip .

[0019] The fi...

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PUM

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Abstract

The invention discloses an NFC (near field communication) cellphone circuit system based on a self-adaptive matching circuit. The NFC cellphone circuit system comprises an NFC chip circuit, a filter circuit, a matching circuit and an antenna circuit, which are sequentially connected. The NFC chip circuit is connected with the antenna circuit, the NFC chip circuit comprises an NFC chip, a variable capacitor and a current management control circuit are connected between the matching circuit and the antenna circuit, the variable capacitor is connected with the output end of the matching circuit in parallel, and the current management control circuit is connected with the variable capacitor. Compared with the prior art, the NFC cellphone circuit system can adjust self-operation frequency according to existing POS (point of sales) operation frequency and can be matched with many POS terminals.

Description

technical field [0001] The invention relates to the application field of NFC cards of portable mobile terminals, in particular to an NFC mobile phone circuit system based on an adaptive matching circuit. Background technique [0002] Near Field Communication (Near Field Communication, hereinafter referred to as NFC) is evolved from the integration of non-contact radio frequency identification (RFID) and interconnection technology, combining inductive card readers, inductive cards and point-to-point It can identify and exchange data with compatible devices in a short distance. The working frequency is 13.56MHz. It is now mostly used in mobile phones, so that mobile phones have the functions of contactless cards and contactless POS machines. [0003] After several years of promotion, NFC technology has been widely used in China. However, because the NFC standard does not have mandatory requirements on the working frequency, the working rate of POS machines produced by existin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/02
Inventor 白露袁涛马玉新
Owner KUNSHAN RUIXIANG XUNTONG COMM TECHCO
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