Charge pump system, control method thereof, and radio frequency identification tag chip including same

Abstract

The invention provides a charge pump system and a control method thereof and a radio frequency identification label chip including the charge pump system, and belongs to the field of the radio frequency identification (RFID) technology. The charge pump system is applied to the RFID label chip and the charge pump system comprises a charge pump circuit, a clock generation circuit, a voltage division circuit and a voltage division detection circuit. If a voltage of a voltage division signal outputted by the voltage division circuit is greater than or equal to a reference voltage set in the voltage division detection circuit, a clock switch signal is outputted by the voltage division detection circuit so that the clock generation circuit outputs a slow clock signal; if the voltage of the voltage division signal is less than the reference voltage, the clock switch signal is outputted by the voltage division detection circuit so that the clock generation circuit outputs a fast clock signal. Therefore, the charge pump system is low in power consumption and is relatively easy to realize compared with the conventional charge pump circuit.

Description

technical field [0001] The invention belongs to the technical field of radio frequency identification (Radio Frequency Identification, RFID), and relates to a charge pump (ChargePump) system with low power consumption applied in an RFID tag chip, a control method of the charge pump system in the voltage raising process, and the charge pump system radio frequency identification tag chip. Background technique [0002] RFID technology has been widely used in various fields, such as goods sales, transportation, production, waste management, postal tracking, air baggage management, vehicle toll management and other fields. Traditional paper barcodes cannot In the field of identification, it has been gradually replaced by the RFID system. [0003] In the tag chip in the RFID system, it is usually necessary to use a charge pump circuit, which can convert a small DC or AC voltage into a higher level DC voltage to meet the high input voltage requirements of the load end of the charg...

AI Technical Summary

Problems solved by technology

Such energy requirements make the RFID tag chip can only be written within tens of centimeters from the card reader, which limits the application range of the RFID tag chip and cannot meet the application requirements of the RFID tag chip (especially the UHF RFID tag chip).

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