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A Low-Voltage Current-Mode Wheatstone Bridge using CMOS Transistors

Authors: Ebrahim Farshidi


This paper presents a new circuit arrangement for a current-mode Wheatstone bridge that is suitable for low-voltage integrated circuits implementation. Compared to the other proposed circuits, this circuit features severe reduction of the elements number, low supply voltage (1V) and low power consumption (<350uW). In addition, the circuit has favorable nonlinearity error (<0.35%), operate with multiple sensors and works by single supply voltage. The circuit employs MOSFET transistors, so it can be used for standard CMOS fabrication. Simulation results by HSPICE show high performance of the circuit and confirm the validity of the proposed design technique.

Keywords: Wheatstone bridge, current-mode, low-voltage, MOS.

Digital Object Identifier (DOI):

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[1] R. J. Perez, Design of Medical Electronic Device (New York: Academic, 2002).
[2] J. J. Carr and J. M. Brown, Introduction to Biomedical Equipment Technology (New York: Wiley, 1981).
[3] J. B. Begueret, M. R. Benbrahim, Z. L. F. Rodes, and J. P. Dom, "Converters dedicated to long term monitoring of strain gauge transducers," IEEE J. Solid-State Circuits (1997), Vol. 32, no. 3, pp. 349-356.
[4] B. A. Gregory, An Introduction to Electrical Instrumentation and Measurement Systems (2nd ed. London, U.K. MacMillan, 1981).
[5] L. P. Huelsman, Basic Circuit Theory (3rd ed. NJ: Prentice-Hall, 1991).
[6] S. Azhari and H. Kaabi, "AZKA cell, the current-mode alternative of Wheatstone bridge," IEEE Trans. Circuits Syst. I, Fundam. Theory Appl. (2000), Vol. 47, no. 9, pp. 1277-1284.
[7] C. Toumazou, F. J. Lidgey, and D. G. Haigh, Analogue IC Design: The Current Mode Approach (London, U.K. Peter Peregrinus, Ltd., 1990).
[8] A. Khan, M. Al-Turiaia, and M. Abo El-Ela, "Operational floating current conveyor: characteristics, modeling and applications," in Proc. IMTC94 (Hamamtsu, Japan, 1994), pp. 788-790.
[9] Y. H. Ghallab and W. Badawy, "A New Topology for a Current-Mode Wheatstone Bridge," IEEE Trans. on Circuits Systems-II (2006), Vol. 53, no. 1, pp. 18-12.
[10] S. Gift, Member, and B. Maundy, "New Configurations for the Measurement of Small Resistance Changes, " IEEE Trans. on Circuits Systems-II (2006), Vol. 53, no. 3, pp. 178-182.
[11] S. Vlassis, S. Siskos, and T. Laopoulos, "A Piezo-Resistive Pressure Sensor Interfacing Circuit," IEEE Instrumentation and Measurement Technology Conference, Vol. 1, (Venice, Italy, 1999), pp. 303-308.
[12] E. Farshidi and S. M. Sayedi, "A 1.2V Current-Mode True RMS-DC Converter Based on The Floating gate MOS Translinear Principle," Microelectronics journal of Elesevier (2008), Vol. 39, no. 2, pp. 293- 298.
[13] E. Farshidi, "Simple Realization of CMOS Current-Mode Wheatstone Bridge," 2th IEEE Signals, Circuits and Systems International Conference, SCS-08 (Hammamet, Tunisia, 2008), pp. 1-4.
[14] Practical Design Techniques for Sensor Signal Conditioning (Analog Devices, 1999).