IC card signal amplifying circuit and IC card adopting circuit

A technology of signal amplification circuit and amplification circuit, which is applied to record carriers used in machines, instruments, computer parts, etc., can solve the problems of unrecognizable data mixing, reduced antenna efficiency, inaccurate frequency, etc., achieve stable work, improve reading Card distance, data read and write reliable effect

Inactive Publication Date: 2017-05-10
FREEVISION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These practices will actually change the internal parameters of the IC card, causing problems such as inaccurate frequency, reduced antenna efficiency, signal attenuation, and unrecognizable data mixing.

Method used

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  • IC card signal amplifying circuit and IC card adopting circuit
  • IC card signal amplifying circuit and IC card adopting circuit
  • IC card signal amplifying circuit and IC card adopting circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] to combine figure 1, the present embodiment describes in detail the IC card signal amplifying circuit of the present invention, which includes: a wireless resonant circuit 1, an amplifying circuit 2, a near-field communication chip 3, an identification circuit 4, and a feedback circuit 5, wherein the antenna resonant circuit 1 is used for Receive the electric field sent by the external card reader; the input end of the amplifier circuit 2 is connected to the output end of the wireless resonant circuit 1, the output end of the amplifier circuit 2 is connected to the input end of the near field communication chip 3, and the amplifier circuit 2 is used to receive antenna resonance The external electric field of loop 1 is isolated to generate a high-frequency electric field and transmitted to the near field communication chip 3; the near field communication chip 3 is used for actual data exchange and various service functions; The output terminal of the identification circu...

Embodiment 2

[0046] In this embodiment, a battery 6 is added on the basis of Embodiment 1. At the same time, in order to save battery energy and prolong battery life, a power control circuit 7 and an electric field detection circuit 8 are added. Connected, the input end of the electric field detection circuit 8 is connected with the wireless resonant circuit 1, the output end of the electric field detection circuit 8 is connected with the power control circuit 7, the electric field detection circuit 8 is used to detect whether the external electric field exists, and control the power control when the external electric field exists The circuit 7 is turned on to turn on the power supply of the battery 6 , and when the external electric field does not exist, the control power control circuit 7 is turned off to turn off the power supply of the battery 6 .

[0047] Such as Figure 4 Shown is a circuit schematic diagram of the power control circuit and the electric field detection circuit of thi...

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PUM

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Abstract

The invention discloses an IC card signal amplifying circuit and an IC card adopting the circuit. The amplifying circuit comprises an antenna resonant circuit, an amplifying circuit, a near field communication chip, an identification circuit and a feedback circuit, wherein the input end of the amplifying circuit is connected with the output end of the antenna resonant circuit; the output end of the amplifying circuit is connected with the input end of the near field communication chip; the input end of the identification circuit is respectively connected with the output end of the near field communication chip and the output end of the amplifying circuit; the output end of the identification circuit is connected with the input end of the feedback circuit; the output end of the amplifying circuit is connected with the input end of the feedback circuit; and the output end of the feedback circuit is connected with the antenna resonant circuit. The IC card comprises the amplifying circuit. According to the IC card signal amplifying circuit and the IC card adopting the circuit, the antenna and an RFID chip are isolated, the IC card reading distance is increased, the anti-interference ability is enhanced, and the IC card information transmission stability is improved.

Description

technical field [0001] The invention relates to the technical field of integrated circuit cards (IC cards), in particular to an IC card signal amplifying circuit and an IC card using the circuit. Background technique [0002] At present, the city card involves bus cards, ID cards, social security cards, and recharge cards such as municipal coal, water, and electricity. In addition, various bank cards have basically been converted into standard IC card models. This standard type of IC card basically adopts 13.56MHz frequency, including the low-frequency IC cards used in access control, are now more and more converted to high-frequency 13.56MHz frequency band. Although the IC cards in this frequency band have different data communication protocols and modulation methods, they basically adopt the ISO14443A data communication protocol for the most frequently used bus cards and access control cards, and most IC cards are designed according to international standards. Both are wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/07
CPCG06K19/0702G06K19/0723
Inventor 王永春赵振河张伟
Owner FREEVISION TECH CO LTD
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