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Power feeding equipment of non-contact card

A technology of power supply device and contactless card, which is applied to circuit devices, electrical components, and adjustment of electrical variables, etc., which can solve problems such as increasing energy storage capacity and prolonging signal pause time, and achieve the effect of maintaining normal operation

Inactive Publication Date: 2004-08-25
上海华园微电子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The technical problem to be solved by the present invention is to provide a power supply device in a contactless card, which aims to solve the defect of prolonged signal pause time and increase the energy storage capacity

Method used

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  • Power feeding equipment of non-contact card
  • Power feeding equipment of non-contact card
  • Power feeding equipment of non-contact card

Examples

Experimental program
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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, the present invention will be described in more detail:

[0024] Such as figure 1 Shown: a parallel oscillating circuit 1 formed by parallel capacitors on the transponder coil, a bridge rectifier 2, an energy storage capacitor 3, an internal circuit 4, the oscillating circuit 1 is connected to the bridge rectifier 2, and the bridge rectifier 2 The two ends of the output of the internal circuit 4 are coupled together with the two ends of the input of the internal circuit 4 through the two ends of the energy storage capacitor 3 .

[0025] Take the transmitting frequency of the 13.56MHz reader as an example, the resonant frequency composed of the two is slightly higher than the transmitting frequency by 1-5MHz. The reason for this is that the common resonance frequency of two transponders close to each other is always lower than the resonance frequency of a single transponder, and the Vcc and Gnd signals are generated at the...

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PUM

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Abstract

A power supply device in a non- contact card includes a parallel oscillating circuit 1, a bridge rectifier 2, an energy storage capacitance 31, a regulation circuit 5 and an internal circuit 4composed of parallel capacitors on a responder coil, among which, 1 is connected with 2, two output ends of 2 are coupled with two input ends of 5 via two ends 31, two output ends of 5 are connected with two input ends of 4. The result of this invention is to maintain normal operation of chips and pass the same or even longer interruption interval with the same or fewer capacitors.

Description

technical field [0001] The invention relates to a power supply device in an integrated circuit, in particular to a power supply device in a non-contact card. Background technique [0002] An important feature of an RFID system is the power supply of the transponder. Passive transponders have no power source of their own. All energy for passive transponder operation must therefore be taken from the electromagnetic field of the reader. [0003] In radio frequency identification technology, the energy supply of the transponder and the data exchange between the transponder and the reader are not via galvanic contacts but via magnetic or electromagnetic fields. Radio and radar technologies are used in this respect. The energy required for the transponder to work, like the input clock pulse and input data information of the transponder, is transmitted to the transponder through the non-contact coupling unit. [0004] A high-frequency, strong electromagnetic field is generated b...

Claims

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Application Information

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IPC IPC(8): G05F1/46H02J50/12
Inventor 卢君明何玉明印义言
Owner 上海华园微电子技术有限公司
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