Tytuł artykułu
Treść / Zawartość
Pełne teksty:
Identyfikatory
Warianty tytułu
Języki publikacji
Abstrakty
This paper introduces a low-noise, low-power amplifier for high-impedance sensors. An innovative circuit using an auto-zeroed architecture combined with frequency modulation to reject offset and low-frequency noise is proposed and analysed. Special care was given to avoid broadband noise aliasing and chopping in the signal path, and to minimize both the resulting equivalent input offset voltage and equivalent input biasing current. The theoretical noise analysis of the proposed topology covers most of the noise sources of the circuit. Simulations show that the input-referred noise level of the circuit is 13.4nV/√Hz for a power consumption of 85µA with a power supply from 1.8V to 3.6V.
Rocznik
Tom
Strony
397--404
Opis fizyczny
Bibliogr. 11 poz., wykr.
Twórcy
autor
- Electronics Laboratory, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
autor
- Semtech Neuchâtel Sàrl, Gouttes d’Or 40, 2000 Neuchâtel, Switzerland
autor
- Electronics Laboratory, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
autor
- Semtech Neuchâtel Sàrl, Gouttes d’Or 40, 2000 Neuchâtel, Switzerland
autor
- Electronics Laboratory, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
Bibliografia
- [1] E. Klumperink, S. Gierkink, A. van der Wel, and B. Nauta, “Reducing mosfet 1/f noise and power consumption by switched biasing,” Solid-State Circuits, IEEE Journal of, vol. 35, no. 7, pp. 994-1001, july 2000.
- [2] O. Oliaei, “Noise analysis of correlated double sampling sc-integrators,” in Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on, vol. 4, 2002, pp. IV-445-IV-448.
- [3] O. A. Hafiz, X. Wang, P. J. Hurst, and S. H. Lewis, “Immediate calibration of operational amplifier gain error in pipelined adcs using extended correlated double sampling,” Solid-State Circuits, IEEE Journal of, vol. PP, no. 99, pp. 1-11, 2013.
- [4] C. Enz and G. Temes, “Circuit techniques for reducing the effects of op-amp imperfections: autozeroing, correlated double sampling, and chopper stabilization,” Proceedings of the IEEE, vol. 84, no. 11, pp. 1584-1614, nov 1996.
- [5] M. Kayal, F. Burger, and R. Popovic, “Magnetic angular encoder using an offset compensation technique,” Sensors Journal, IEEE, vol. 4, no. 6, pp. 759-763, dec. 2004.
- [6] Z. Jing, Z. Shuang, and C. Shudong, “A chopper stabilized pre-amplifier for magnetic sensor,” in Industrial Control and Electronics Engineering (ICICEE), 2012 International Conference on, aug. 2012, pp. 501-504.
- [7] M. Pertijs and W. Kindt, “A 140 db-cmrr current-feedback instrumentation amplifier employing ping-pong auto-zeroing and chopping,” Solid-State Circuits, IEEE Journal of, vol. 45, no. 10, pp. 2044-2056, oct. 2010.
- [8] I. Finvers, J. Haslett, and F. Trofimenkoff, “Noise analysis of a continuous-time auto-zeroed amplifier,” Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on, vol. 43, no. 12, pp. 791-800, dec 1996.
- [9] M. Degrauwe, E. Vittoz, and I. Verbauwhede, “A micropower cmosinstrumentation amplifier,” in Solid-State Circuits Conference, 1984. ESSCIRC ’84. Tenth European, sept. 1984, pp. 31-34.
- [10] P. Sun, M. Zhao, X. Wu, and R. Fan, “A novel capacitively-coupled instrumentation amplifier employing chopping and auto-zeroing,” in Circuits and Systems (APCCAS), 2012 IEEE Asia Pacific Conference on, dec. 2012, pp. 156-159.
- [11] J. Witte, J. Huijsing, and K. Makinwa, “A chopper and auto-zero offset-stabilized cmos instrumentation amplifier,” in VLSI Circuits, 2009 Symposium on, june 2009, pp. 210-211.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-f1284344-7634-4654-8298-de7d8a6d68a6