A Fully Differential Potentiostat

Martin, Steven M.; Gebara, F.H.; Strong, T.D.; Brown, Richard B.

doi:10.1109/jsen.2008.2011085

Cited by 66 publications

(40 citation statements)

References 18 publications

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“…These double layer capacitances and faradic resistances depend on the area of the electrodes and the solution concentration [8]. They can be expressed by…”

Section: Measurement Resultsmentioning

confidence: 99%

A Unified Potentiostat for Electrochemical Glucose Sensors

Sohn¹,

Oh²,

Kim³

et al. 2013

Transactions on Electrical and Electronic Materials

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A unified potentiostat circuit for both O 2 -and H 2 O 2 -based electrochemical glucose sensors was proposed and its function was verified by circuit simulations and measurement results of a fabricated chip. This circuit consisted of an operational amplifier, a comparator and current mirrors. The proposed circuit was fabricated with a 0.13 ㎛ thick oxide CMOS process and an active area of 360 ㎛ × 100 ㎛. The measurements revealed an input operation range from 0.5 V to 1.6 V in the H 2 O 2 -based bio-sensor and from 1.7 V to 2.6 V in the O 2 -based bio-sensor with a supply voltage of 3.3 V. The evaluation results showed that the proposed potentiostat circuit is suitable for measuring the electrochemical cell currents of both O 2 -and H 2 O 2 -based glucose sensors.

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“…These double layer capacitances and faradic resistances depend on the area of the electrodes and the solution concentration [8]. They can be expressed by…”

Section: Measurement Resultsmentioning

confidence: 99%

A Unified Potentiostat for Electrochemical Glucose Sensors

Sohn¹,

Oh²,

Kim³

et al. 2013

Transactions on Electrical and Electronic Materials

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“…In fact, in three electrode systems, the potentiostat controls the current at the CE as a function of the potential. Based on this, the work by Zhang achieves the detection current range of 10 pA to 10 µA by controlling the gain in the amplifier stage with the amperometric sensor [12]. It consists of a potentiostat biasing structure and a single channel switched capacitor current readout circuit.…”

Section: Amperometric Sensormentioning

confidence: 99%

“…Table 5.2 summarized methods and associated costs for reducing the noise. 11,12 and L 17,18 Area and bandwidth…”

Section: Circuit Designmentioning

confidence: 99%

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CMOS Analog Front-End IC for Gas Sensors

Kim

Bakkaloglu²

2011

Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT)

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This thesis presents a gas sensor readout IC for amperometric and conductometric electrochemical sensors. The Analog Front-End (AFE) readout circuit enables tracking long term exposure to hazardous gas fumes in diesel and gasoline equipments, which may be correlated to diseases. Thus, the detection and discrimination of gases using microelectronic gas sensor system is required. This thesis describes the research, development, implementation and test of a small and portable based prototype platform for chemical gas sensors to enable a low-power and low noise gas detection system. The AFE reads out the outputs of eight conductometric sensor array and eight amperometric sensor arrays. The IC consists of a low noise potentiostat, and associated 9bit current-steering DAC for sensor stimulus, followed by the first order nested chopped Σ∆ ADC. The conductometric sensor uses a current driven approach for extracting conductance of the sensor depending on gas concentration. The amperometric sensor uses a potentiostat to apply constant voltage to the sensors and an I/V converter to measure current out of the sensor. The core area for the AFE is 2.65x0.95 mm 2 .The proposed system achieves 91 dB SNR at 1.32 mW quiescent power consumption per channel. With digital offset storage and nested chopping, the readout chain achieves 500 µV input referred offset.iii ACKNOWLEDGEMENTS

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“…As advances in bioelectronics are being made, more functions can be included on a single biomedical device [1] [2]. Such advances increase the quality of patient care but at the same put a greater constraint on power and size for each additional function to be integrated on the same chip.…”

Section: Introductionmentioning

confidence: 99%

A Low Power 15-Bit Decimator in 0.18um CMOS for Biomedical Applications

Scholfield

2013

2013 Euromicro Conference on Digital System Design

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Biomedical devices are often battery operated and require low power consumption. As biomedical devices increase in complexity to include multiple functions such as signal processing and data storage, the constraint on power consumption becomes a larger issue. This paper presents a low power design for a decimator as part of a sigma-delta ADC for biomedical application in a commercial 0.18Pm CMOS process. To make the design low power, it makes use of a bit-serial architecture, a low supply voltage of 0.9V and a clock rate of 1MHz.

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A Fully Differential Potentiostat

Cited by 66 publications

References 18 publications

A Unified Potentiostat for Electrochemical Glucose Sensors

A Unified Potentiostat for Electrochemical Glucose Sensors

CMOS Analog Front-End IC for Gas Sensors

A Low Power 15-Bit Decimator in 0.18um CMOS for Biomedical Applications

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