Static protection circuit suitable for radio frequency identification label chip

A technology for radio frequency identification tags and electrostatic protection, which is applied in the field of passive RFID tag chips, can solve the problems of low efficiency, high power consumption, and inability to share current equally, so as to reduce area, reduce power consumption, and improve ESD The effect of protective performance
CN101046853AInactive Publication Date: 2007-10-03HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2007-10-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention discloses an electrostatic protection circuit applicable to radio-frequency identification label chip. Said circuit includes voltage comparator circuit and current dumping circuit. Said voltage comparator circuit includes PMOS transistor P1 and P3 and resistor R2 and R3 and is used for detecting and comparing voltage value; and said current dumping circuit includes NMOS transistor N1 and N2, diode D1 and resistor R1 and is used for dumping electrostatic pulse and radio-frequency high-voltage.
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Description

technical field

[0001] The invention belongs to the technical field of electrostatic protection, in particular to an electrostatic protection (ESD, electronic static discharge) circuit suitable for radio frequency identification (RFID) tag chips, especially suitable for application in passive RFID tag chips. Background technique

[0002] RFID (radio frequency identification) radio frequency identification technology has been paid more and more attention in recent years. Compared with barcodes, magnetic cards, IC cards and other contemporary or early identification technologies, radio frequency cards have the advantages of non-contact, long reading distance, and ability to identify moving targets. Because the energy of the passive RFID tag chip comes from electromagnetic waves, and the induced voltage will change according to the strength of the magnetic field, it is necessary to have a radio frequency voltage limiting circuit to limit the induced voltage to prevent high volt...

Claims

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