Signal readout circuit for amperometric sensor

Details Signal readout circuit for amperometric sensor Signal readout circuit for amperometric sensor

2007-11-27

2010-02-16

Nguyen, Vincent Q (Department: 2831)

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

C324S425000, C205S775000

Reexamination Certificate

active

07663357

ABSTRACT:
A signal readout circuit for amperometric sensor for reading a readout signal of a sensor includes an amplifier, a first transistor, a second transistor, and a first resistor. A negative input end of the amplifier receives an input voltage, and a positive input end of the amplifier is connected to a reference electrode of the sensor. Gates of the first transistor and the second transistor are connected to an output end of the amplifier, a drain of the first transistor is connected to a counter electrode of the sensor, and a drain of the second transistor is connected to the first resistor.

REFERENCES:
patent: 5202637 (1993-04-01), Jones
patent: 6428684 (2002-08-01), Warburton
Integrated VLSI potentiostat for cyclic voltammetry in electrolytic reactions, Harpreet S. Narula et al., Proceedings of the IEEE Computer Society Annual Symposium on VLSI Emerging Trends in VLSI System Design (ISVLSI' 04), 2004.
Integrating Data Converters for Picoampere Currents From Electrochemical Transducers, Madalina Breten et al., ISCAS 2000—IEEE International Symposium on Circuits and Systems, p. 709-712, May 28-31, 2000.
A CMOS Potentiostat for Amperometric Chemical Sensors, Robin F. B. Turner et al., IEEE Journal of Solid-State Circuits, vol. SC-22, No. 3, p. 473-478, Jun. 1987.

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