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A voltage conversion circuit for rfid

A technology of voltage conversion circuit and voltage domain, which is applied in the field of radio frequency identification, can solve the problems of reduced signal quality, weak usability, high circuit power consumption, etc., and achieve the effect of reducing circuit power consumption, strong availability, and reducing signal quality

Inactive Publication Date: 2017-02-15
GUANGZHOU SYSUR MICROELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the reader is handheld, the power consumption requirements are more stringent. At present, the circuit power consumption of the reader is high, and when the power consumption is reduced, there is a problem that the signal quality is reduced, and the usability is weak.

Method used

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  • A voltage conversion circuit for rfid
  • A voltage conversion circuit for rfid
  • A voltage conversion circuit for rfid

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0024] In the current reader, the working voltage is usually 5V. In the embodiment of the present invention, the module with a particularly large power consumption inside the chip is reduced to reduce the working voltage of the module, which can greatly reduce the power consumption. For example, in the signal amplifier at the receiving end of the reader, there are a large number of operational amplifiers, which consume a lot of power. The current of each branch of t...

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Abstract

An embodiment of the invention discloses a voltage conversion circuit used for RFID (radio frequency identification). The voltage conversion circuit comprises a low dropout regulator, a 3.3V working module, a voltage domain converter and a 5V working module, the low dropout regulator is used for converting working voltage from 5V to 3.3V, the 3.3V working module is connected with the LDO and used for converting analog signals input to the 3.3V working module into digital signals, the voltage domain converter is connected with the 3.3 V working module and used for converting the working voltage between 3.3V and 5V, and the 5V working module is connected with the voltage domain converter and used for receiving the working voltage of 5V and receiving digital signals output by the 3.3V working module. Power consumption of the voltage conversion circuit can be lowered substantially without lowering signal quality, and utilizability is high.

Description

technical field [0001] The present invention relates to the technical field of radio frequency identification (Radio Frequency Identification, RFID), in particular to a voltage conversion circuit for RFID. Background technique [0002] Radio frequency identification technology is a non-contact automatic identification technology, which transmits signals through electromagnetic waves or inductive coupling to complete automatic identification of target objects. Radio signals transmit data from a tag attached to an item through an electromagnetic field tuned to a radio frequency to automatically identify and track the item. Some tags can get energy from the electromagnetic field emitted by the identifier during identification, and do not need batteries; there are also tags that have their own power supply and can actively emit radio waves (electromagnetic fields tuned to radio frequencies). Tags contain electronically stored information and can be identified within a few meter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/00
Inventor 胡建国吴劲丁一段志奎丁颜玉王德明
Owner GUANGZHOU SYSUR MICROELECTRONICS
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