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Digital shaping circuit

A shaping circuit and digital technology, applied in the field of decoding technology and digital circuits, can solve the problems of poor fault tolerance of decoding circuit and low level difference of anti-counterfeiting of decoding circuit, and achieve the effect of improving fault tolerance and solving poor fault tolerance.

Active Publication Date: 2016-06-29
DATANG MICROELECTRONICS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a digital shaping circuit to solve the problem that the decoding circuit of the non-contact IC card in the prior art generally has poor error tolerance and low anti-counterfeiting ability of the decoding circuit. bad question

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Embodiment Construction

[0031] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0032] The steps shown in the flowcharts of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0033] The above has introduced some common problems existing in decoding the non-contact IC card. The following is illustrated by several specific technical solutions in the prior art:

[0034] First, the technical solution with the patent number "CN201...

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Abstract

The invention discloses a digital shaping circuit. The digital shaping circuit provided by the embodiment of the invention comprises an effective falling edge detection apparatus and a low-level recovery apparatus, wherein the effective falling edge detection apparatus is used for shaping demodulation envelope signals according to the demodulation envelope signals output by a simulation demodulation circuit and a carrier wave clock, performing pseudo low-level filtering processing on falling edge signals obtained after shaping, outputting effective falling edge signals, and transmitting the effective falling edge signals to the low-level recovery apparatus; and the low-level recovery apparatus is used for generating shaping envelope signals according to the effective falling edge signals and the carrier wave clock. The digital shaping circuit solves the problems of quite poor fault tolerance capability of a decoding circuit in decoding of a non-contact IC card and quite low false-proof low-level capability of the deciding circuit in the prior art.

Description

technical field [0001] The invention relates to the fields of decoding technology and digital circuit technology, in particular to a digital shaping circuit. Background technique [0002] Contactless integrated circuit (Integrated Circuit Card, referred to as: IC) cards have been widely used in the daily life of users, such as various types of bus cards, resident health cards, ID cards, financial IC cards, Near Field Communication (Near Field Communication, Referred to as: NFC) equipment and radio frequency identification (Radio Frequency Identification, referred to as: RFID) electronic tags. [0003] The International Organization for Standardization (abbreviated as: ISO) and the International Electrotechnical Commission (abbreviated as: IEC) have formulated an international standard for contactless IC cards, namely the ISO / IEC14443 protocol. Take the TPYEA type card defined in the ISO / IEC14443 protocol as an example to illustrate. In the information exchange between the T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10G06K7/00
CPCG06K7/0008G06K7/10118G06K7/10297
Inventor 徐伟人王敏杨敬郭光宇
Owner DATANG MICROELECTRONICS TECH CO LTD