A 0.12 μW power dissipation quartz oscillator with 32,768 Hz frequency was designed and fabricated. Stability of the oscillator versus power supply and temperature variations was measured. The design is suitable for the role of the RTC (real-time clock) or main system clock in low-power, battery-powered and energy harvesting systems.
References
[1]
Ruffieux, D.; Pliska, A.; Krummenacher, F. Silicon-resonator-based, 3 μA Real-time Clock with 5ppm Frequency Accuracy. Proceedings of the International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA, 8–12 February 2009; pp. 209–211.
[2]
Roessig, T.A.; Howe, R.T.; Pisano, A.P. Nonlinear Mixing in Surface-micromachined Tuning Fork Oscillators. Proceedings of the 1997 IEEE International Frequency Control Symposium; Institute of Electrical & Electronics Engineers: New York, NY, USA, 1998; pp. 778–782.
[3]
Tuantranont, A.; Wisitsora-at, A.; Sritongkham, P.; Jaruwongrungsee, K. A review of monolithic multichannel quartz crystal microbalance: A review. Anal. Chim. Acta 2011, 687, 114–128.
[4]
Pantalei, S.; Zampetti, E.; Macagnano, A.; Bearzotti, A.; Venditti, I.; Russo, M.V. Enhanced Sensory properties of a multichannel quartz crystal microbalance coated with polymeric nanobeads. Sensors 2007, 7, 2920–2928.
[5]
Epson Toyocom SG-3040LC/JC Quartz Oscillator Datasheet. Available online: http://www.epsontoyocom.co.jp/product/OSC/set01/sg3040lc_jc/index.html (accessed on 10 May 2011).
[6]
Aebischer, D.; Oguey, H.J.; von Kaenel, V.R. A 2.1-MHz crystal oscillator time base with a current consumption under 500 nA. IEEE J. Solid-State Circuits 1997, 32, 999–1005.
[7]
Karthaus, U. A differential two-pin crystal oscillator—concept, analysis, and implementation. IEEE Trans. Circuits Syst. 2006, 53, 1073–1077.
[8]
Thommen, W. An Improved Low Power Crystal Oscillator. Proceedings of the 25th European Solid-State Circuits Conference (ESSCIRC '99), Duisburg, Germany, 21–23 September 1999; pp. 146–149.