Passive radio frequency identification power-on control circuit and passive radio frequency identification tag

Abstract

The invention is suitable for the field of radio frequency, and provides a passive radio frequency identification power-on control circuit and a passive radio frequency identification tag. The power-on control circuit is connected with a rectification and voltage stabilization circuit, a resetting circuit and a digital circuit and comprises a first control unit for generating a switch-off control signal and a first power-on control signal according to a resetting signal output by the resetting circuit before power-on is performed to control the rectification and voltage stabilization circuit to output voltage stably during power-on and keeping switched off after power-on is performed, and a second control unit for controlling switch-off according to the switch-off control signal before power-on is performed and generating the first power-on control signal according to a digital logic control signal output by the digital circuit after power-on is performed to control the rectification and voltage stabilization circuit to output voltage stably after power-on is performed. According to the system, before power-on is performed, the first control unit controls to generate a stable logic state control signal according to the resetting signal and keep a power supply stable, so that the system can stably work during power-on; and the system is simple in structure and low in cost.

Description

technical field [0001] The invention belongs to the radio frequency field, and in particular relates to a passive radio frequency identification power-on control circuit and a passive radio frequency identification label. Background technique [0002] Radio Frequency Identification (RFID) is a non-contact automatic identification technology, which can be used in warehouse management, identification, transportation, food medical, animal management and other fields. Due to its wide application, RFID Technology has been paid more and more attention in recent years, and high-performance RFID systems need to dynamically adjust the limiter circuit of the rectifier circuit in the RF front-end for different actual processes, temperatures and field strengths to meet performance needs. [0003] RFID tags are mainly divided into two types: passive tags and active tags. The energy of the passive passive RFID tag system comes from the radio frequency energy emitted by the reader. There i...

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Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide a passive radio frequency identification power-on control circuit, aiming at solving the current problem that the power supply cannot be accurately controlled during the power-on period of the passive radio frequency identification tag

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