Radio frequency card detection circuit and apparatus in high-frequency radio frequency field

A technology for detecting circuits and radio frequency fields. It is applied to near-field transmission systems, advanced technologies, and electrical components in radio frequency identification systems. It can solve the problems of high power consumption and slow speed, achieve low power consumption, reduce power consumption, and achieve handy effect

Active Publication Date: 2018-06-19
南京中科微电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this radio frequency card detection method needs to activate the transceiver circuit of the MCU and the card reader every time the radio frequency card is detected, which leads to the problem of slow speed and high power consumption.

Method used

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  • Radio frequency card detection circuit and apparatus in high-frequency radio frequency field
  • Radio frequency card detection circuit and apparatus in high-frequency radio frequency field

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Embodiment Construction

[0025] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0026] As a first aspect of the present invention, a radio frequency card detection circuit in a high frequency radio frequency field is provided, wherein, as figure 1 As shown, the radio frequency card detection circuit 10 in the described high frequency radio frequency field comprises: high pass filter 20, envelope detector 30, amplifier 40, comparator 70, decider 80 and counter 60,

[0027] The input end of described high-pass filter 20 is used for inputting the signal to be detected, and the output end of described high-pass filter 20 is connected with the input end of described envelope detector 30, and described high-pass filter 20 is used for described to...

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Abstract

The invention relates to the technical field of radio frequency detection, and specifically discloses a radio frequency card detection circuit in a high-frequency radio frequency field. The circuit comprises: a high-pass filter, an envelope detector, an amplifier, a comparator, a judger and a counter, the output end of the high-pass filter is connected with the input end of the envelope detector;the output end of the envelope detector is connected with the input end of the amplifier; the output end of the amplifier is connected with the first input end of the comparator and the first input end of the judger; the first output end of the comparator is connected with the second input end of the judger, and the second output end of the comparator is connected with the third input end of the judger; the output end of the judger is connected with the first input end of the counter; and the first input end of the counter is used for inputting a judgment signal. The invention further discloses a radio frequency card detection apparatus in the high-frequency radio frequency field. The radio frequency card detection circuit in the high-frequency radio frequency field provided by the invention has the advantages of high speed and low power consumption.

Description

technical field [0001] The invention relates to the technical field of radio frequency detection, in particular to a radio frequency card detection circuit in a high frequency radio frequency field and a radio frequency card detection device in a high frequency radio frequency field including the radio frequency card detection circuit in a high frequency radio frequency field. Background technique [0002] In the scheme of detecting whether there is a radio frequency card in the high-frequency radio frequency RF field, the method in the prior art is to first activate the transceiver circuit of the card reader, open the radio frequency field, then send a request command to the radio frequency card, and then wait for the radio frequency card to respond; Within a period of time, if the card reader receives a response, it means that there is a radio frequency card, otherwise there is no radio frequency card. However, this radio frequency card detection method needs to activate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B5/00H04B17/00
CPCH04B17/00H04B5/73H04B5/77Y02D30/70
Inventor 曾敦肖时茂
Owner 南京中科微电子有限公司
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