一种用于UHF RFID标签的高稳定度时钟电路

doi:10.3969/j.issn.1001-2400.2011.04.013

J4 ›› 2011, Vol. 38 ›› Issue (4): 71-76.doi: 10.3969/j.issn.1001-2400.2011.04.013

• Original Articles • Previous Articles Next Articles

Clock generator with high stability for the UHF RFID chip

LIU Weifeng;ZHUANG Yiqi;ZHOU Junchao;TANG Longfei;JIN Zhao

(Ministry of Education Key Lab. of Wide Band-Gap Semiconductor Materials and Devices, Xidian Univ., Xi'an 710071， China)

Received:2010-11-26 Online:2011-08-20 Published:2011-09-28
Contact: LIU Weifeng E-mail:liuweifeng1268@163.com

Abstract

Abstract:

An improved design of the clock circuit is proposed for passive UHF radio frequency identification tag chips. Through the dynamic adjustment of the control circuits by setting capacitances and relevant calibration circuits in the traditional relaxation oscillator circuits, irrelevance is realized between the clock frequency and the working-voltage and bias current, so that the clock jitter caused by power fluctuations and deviation is suppressed so as to guarantee the stability of the clock frequency. At the same time, two kinds of resistance with positive or negative temperature coefficient and calibrating circuits are adopted to keep the clock cycle stability within a large scope of temperature variation. This circuit has been taped out with TSMC 0.18μm process. Test results show that the proposed circuits can get a more calibration scope and clock precision with power consumption of 0.86μW, which is very suitable for passive chips.

Key words: ultra high frequency(UHF), radio frequency identification(RFID), clock generator

CLC Number:

TN202

LIU Weifeng;ZHUANG Yiqi;ZHOU Junchao;TANG Longfei;JIN Zhao. Clock generator with high stability for the UHF RFID chip[J].J4, 2011, 38(4): 71-76.

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[2]	CHEN Lei;SHI Xiaowei;YU Jianfeng;CHEN Yang. Design of a retrodirective array for RFID application [J]. J4, 2014, 41(6): 71-75.

Clock generator with high stability for the UHF RFID chip

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