Voltage stabilizer for medium-high frequency interface of electronic label

Abstract

The invention discloses a voltage stabilizer for a medium-high frequency interface of an electronic label. The voltage stabilizer comprises a first resistor, a first PMOS tube and a first NMOS tube, wherein the two ends of the first resistor are respectively connected with the first PMOS tube source electrode and the first NMOS tube drain electrode, the first NMOS tube source electrode is connected with the ground, the first PMOS tube is an MOS tube including a diode for connection, and the first NMOS tube grid is connected with the first PMOS tube drain electrode. A direct-current voltage input line is connected to the line between the first NMOS tube drain electrode and the first resistor, and a direct-current voltage output line is connected to the line between the first PMOS tube source electrode and the first resistor. By means of the structure, the voltage stabilizer is simple in whole structure and convenient to achieve. When being used, the voltage stabilizer can prevent bleed-off voltage from hopping through the action of the first PMOS tube and the first NMOS tube to further avoid demodulation failure.

Description

technical field [0001] The invention relates to the field of radio frequency technology, in particular to a voltage stabilizer for a medium-frequency interface of an electronic label. Background technique [0002] With the rapid development of electronic technology and the continuous improvement of manufacturing level, the radio frequency identification technology developed by radio is developing rapidly. As a non-contact IC card, the radio frequency identification electronic tag combines radio technology and IC technology. Identify target objects and capture relevant data. The high-frequency interface of the electronic tag in the RFID system forms a high-frequency transmission path from the reader to the electronic tag. The high-frequency interface absorbs current from its antenna, and rectifies and stabilizes the absorbed current as the power supply of the chip in the electronic tag. There is a voltage stabilizer in the high-frequency interface. The voltage stabilizer is ...

AI Technical Summary

Problems solved by technology

There is a voltage stabilizer in the high-frequency interface. The voltage stabilizer is mainly used to prevent the rectified DC power supply voltage from being too high, and to discharge the excessively high DC voltage. The standard voltage is compared to obtain the voltage to be discharged. The discharge voltage obtained in this way will have a process of sudden voltage jump, which makes the discharge current change a lot before and after the jump, which may make the modulation of the received signal The depth is very small in a certain range of field strength, which will lead to demodulation failure

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