应用于无源UHF RFID传感器接口的低功耗低压转换器设计

Low Power Low Voltage Converter Design for Passive UHF RFID Sensor Interface

为了增加射频识别(RFID)传感器的识读范围,针对无源超高频UHF(Ultra High Frequency)RFID标签的传感器接口,提出了一种新的低功耗低压时间数字转换器设计。该传感器接口采用基于游标原理的高效时数转换器,在保证分辨率和转换效率的同时,能够实现较低的功耗和较大的动态范围。采用TSMC 90 nm标准CMOS技术设计并制造。测量结果显示相比其他类似结构,提出接口在输入时间范围28.18μs^42.94μs时有效分辨率为10.48 bits。采样率为20 ksample/s时,转换器转化效率为0.396 p J/bit,且功耗和电压供应分别仅为3.84μW和0.6 V,能够有效增强无源UHF RFID压力传感器标签的识读范围。

In order to increase the radio frequency identification(RFID)reader range sensor,for passive UHF(Ultra High Frequency)sensor interface RFID tag,a new low power low voltage time digital converter design was proposed.The sensor interface uses an efficient time-to-minute converter based on the principle of vernier.It can achieve lower power consumption and larger dynamic range while ensuring resolution and conversion efficiency.TSMC 90 nm standard CMOS technology is used to design and manufacture.Measurement results show that compared with other similar structures,the proposed interface has an effective resolution of 10.48 bit at the input time range 28.18μs^42.94μs.When the sampling rate is 20 ksample/s,the conversion efficiency of the converter is 0.396 pJ/bit,and the power consumption and voltage supply are only 3.84μW and 0.6V respectively,which can effectively enhance the recognition range of passive UHF RFID pressure sensor tag.