Random number generator used for passive label chip

A random number generator and passive tag technology, applied in random number generators, record carriers used by machines, instruments, etc., can solve the problems of irregular changes, slow speed, poor statistical performance, etc. Statistical, reduced power consumption, low power consumption effect

Inactive Publication Date: 2016-11-09
WUXI KEYBRIDGE ELECTRONICS TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

True random numbers are generated by analog circuits. Due to the deviation of the manufacturing process and the change of the working enviro

Method used

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  • Random number generator used for passive label chip
  • Random number generator used for passive label chip

Examples

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[0011] figure 1 As shown, a random number generator for passive tag chips is disclosed, including an analog circuit and a digital circuit, the analog circuit generates random numbers, and the random numbers output by the analog circuit are processed by the digital circuit. Output processing; makes the output random numbers more statistical. Wherein, the analog circuit is mainly composed of a ring oscillator, and the digital circuit is mainly composed of a linear feedback shift register; wherein, the output of the ring oscillator is used as the input of the linear feedback shift register.

[0012] figure 2 It is a schematic structural diagram of the linear feedback shift register of the present invention. The linear feedback shift register is composed of a 32-bit register; wherein, the clock and reset signal of the digital circuit are respectively connected to the Clk end and the Reset end of each register, and its characteristic polynomial is X 32 +X 30 +X 8 +X 3 +1; gu...

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Abstract

The invention discloses a random number generator used for a passive label chip, comprising an analog circuit and a digital circuit; the analog circuit generates a random number and the digital circuit performs output processing on the random number outputted by the analog circuit. The random number generator adopts a scheme combining the simulation circuit and the digital circuit; the simulation circuit adopts a ring oscillator with low power consumption to effectively reduce power consumption of a chip; the digital circuit uses a 32-bit linear feedback shift register and a cycle is 232; and a new random number which is generated after the output of the random number of the analog circuit is processed has a better statistical property.

Description

technical field [0001] The invention relates to a random number generator for a passive tag chip. Background technique [0002] At present, in the field of RFID applications, it is possible that one reader operates on multiple tags, so the anti-collision performance of tags is very important. Most of the existing tag anti-collision algorithms are based on random numbers. Therefore, the use of a random number generator with good randomness has an important impact on improving the anti-collision performance of tags. Random numbers can be divided into two types: true random numbers and pseudo-random numbers. True random numbers are generated by analog circuits. Due to the deviation of the manufacturing process and the change of the working environment, the change of true random numbers has no rules to follow, but the generation speed is relatively slow and the statistics are not good. Pseudo-random numbers have a fixed period, and the random numbers generated follow a fixed ...

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Application Information

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IPC IPC(8): G06K19/07G06F7/58
CPCG06K19/07G06F7/588
Inventor 刘俊伟向晓安蔡友张建王立泉
Owner WUXI KEYBRIDGE ELECTRONICS TECH CO LTD
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