Power supply management device applied to RFID reader full chip and method thereof

Abstract

The embodiment of the invention discloses a power supply management device applied to an RFID reader full chip and a method thereof. The device comprises an operational amplifier module for receiving a reference voltage and a feedback sampling signal outputted by a power tube module, comparing the reference voltage and the feedback sampling signal, and sending the analog signal outputted by the comparison to an analog to digital conversion module, the analog to digital conversion module which is used for receiving the analog signal sent by the operational amplifier module, carrying out analog to digital conversion on the analog signal, and obtaining a digitized feedback sampling signal, a digital control module which is used for controlling a power tube to start and close a corresponding branch orderly according to the feedback sampling signal, and a power tube module used for orderly start and close the corresponding branch. According to the implementation of the embodiment of the invention, the provision of an addition pin for multiple-voltage-domain isolated power supply is not needed, the multiple-voltage-domain power supply can be realized in the chip of an RFID reader, and the introduction of ambient noise is avoided.

Description

technical field [0001] The present invention relates to the technical field of radio frequency identification (Radio Frequency Identification, RFID) reader power management, and in particular to a power supply management device and method applied to a full chip of an RFID reader. Background technique [0002] RFID 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 inf...

AI Technical Summary

Problems solved by technology

However, the power supply design at the PCB board level is easy to introduce environmental noise, and additional pins are required for isolated power supply of multiple voltage domains

Therefore, it is necessary to implement multi-voltage power supply inside the chip, and the existing circuit cannot meet the needs of multi-voltage power supply

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