© The Institution of Engineering and Technology
Passive radio frequency identification tags extract energy from incoming electromagnetic waves to power up their internal circuitry. Such a limited source of power demands efficient circuits to minimise the power consumption. In this work a new technique is proposed to design a low-power ring oscillator in which the voltage swing of internal nodes are constrained to lower the dynamic power consumption. The proposed power reduction technique can be employed for RFID tags operating over different frequency bands from low frequency (LF) to microwave. A low-power oscillator operating in the medium-frequency range (6–16 MHz) for applications such as electronic article surveillance and item management has been implemented in this work. Post-layout simulation results using STMicroelectronics CMOS 65 nm technology indicate that the proposed method can reduce the power consumption by more than 25%.
References
-
-
1)
-
D. Sheng ,
C.-C. Chung ,
C.-Y. Lee
.
An ultra-low-power and portable digitally controlled oscillator for SoC applications.
IEEE Trans. Circuits Syst. II Express Briefs
,
11 ,
954 -
958
-
2)
-
J. Galan ,
R.G. Carvajal ,
A. Torralba ,
F. Munoz ,
J. Ramirez-Angulo
.
A low-power low-voltage OTA-C sinusoidal oscillator with a large tuning range.
IEEE Trans. Circuits Syst. I
,
2 ,
283 -
291
-
3)
-
Farzeen, S., Ren, G., Chen, C.: `An ultra-low power ring oscillator for passive UHF RFID transponders', IEEE Int. Midwest Symp. on Circuits and Systems, 2010, p. 558–561.
-
4)
-
Cioffi, K.R., Wan-Thai, H.: `32KHz MEMS-based oscillator for low-power applications', IEEE Int. Frequency Control Symp. and Exposition, 2005, p. 551–558.
-
5)
-
A. Abidi
.
Phase noise and jitter in CMOS ring oscillators.
IEEE J. Solid-State Circuits
,
8 ,
1803 -
1816
-
6)
-
Cilek, F., Seemann, K., Brenk, D.: `Ultra low power oscillator for UHF RFID transponder', IEEE Int. Frequency Control Symp., 2008, p. 418–421.
-
7)
-
A. Hajimiri ,
T.H. Lee
.
A general theory of phase noise in electrical oscillators.
IEEE J. Solid-State Circuits
,
2 ,
179 -
193
-
8)
-
De Vita, G., Marraccini, F., Iannaccone, G.: `Low-voltage low-power cmos oscillator with low temperature and process sensitivity', IEEE Int. Symp. on Circuits and Systems, 2007, p. 2152–2155.
-
9)
-
Tan, J.Y.J., Kian, A.N., Yong, P.X.: `An integrated low power one-pin crystal oscillator', IEEE Asia Pacific Conf. on Circuits and Systems, 2008, p. 1352–1355.
-
10)
-
F. Song ,
J. Yin ,
H.L. Liao ,
R. Huang
.
Ultra-low-power clock generation circuit for EPC standard UHF RFID transponders.
Electron. Lett.
,
3 ,
199 -
201
-
11)
-
Meng-Lin, H., Yu-Sheng, T., Oscal, T., Chen, C.: `An UHF passive RFID transponder using a low-power clock generator without passive components', IEEE Int. Midwest Symp. on Circuits and Systems, 2006, p. 11–15.
-
12)
-
Yodprasit, U., Enz, C.: `Realization of a low-voltage and low-power colpitts quadrature oscillator', IEEE Int. Symp. on Circuits and Systems, 2006, p. 4289–4292.
-
13)
-
Barnett, R., Balachandran, G., Lazar, S.: `A passive UHF RFID transponder for EPC gen2 with −14 dBm sensitivity in 0.13 um CMOS', IEEE Int. Conf. on Solid-State Circuits, 2007, p. 582–623.
-
14)
-
C. Chan ,
K. Pun ,
K. Leung
.
A low-power continuously-calibrated clock recovery circuit for UHF RFID EPC class-1 generation-2 transponders.
IEEE J. Solid-State Circuits
,
3 ,
587 -
599
-
15)
-
B. Razavi
.
(2002)
Design of analog CMOS integrated circuits.
-
16)
-
Weigandt, T.C., Beomsup, K., Gray, P.R.: `Analysis of timing jitter in CMOS ring oscillators', IEEE Int. Symp. on Circuits and Systems, 1994, 4, p. 27–30.
-
17)
-
Barnett, R., Jin, L.: `A 0.8 V 1.52 MHz MSVC relaxation oscillator with inverted mirror feedback reference for UHF RFID', IEEE Custom Integrated Circuits Conf., 2006, p. 769–772.
-
18)
-
A. Hajimiri
.
Jitter and phase noise in ring oscillators.
IEEE J. Solid-State Circuits
,
6 ,
790 -
804
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