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A CMOS Analog Correlator-Based Painless Nonenzymatic Glucose Sensor Readout Circuit
- Authors
- Shenoy, Varun; Jung, Sungyong; Yoon, Youngsam; Park, Youngjin; Kim, Hyoungsoo; Chung, Hoon-Ju
- Issue Date
- May-2014
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Glucose sensor; CMOS; readout circuit; correlator; microneedle; amperometric circuit
- Citation
- IEEE SENSORS JOURNAL, v.14, no.5, pp 1591 - 1599
- Pages
- 9
- Journal Title
- IEEE SENSORS JOURNAL
- Volume
- 14
- Number
- 5
- Start Page
- 1591
- End Page
- 1599
- ISSN
- 1530-437X
1558-1748
- Abstract
- An analog correlator-based readout circuit for amperometric glucose electrochemical biosensors is designed and implemented in 0.35-mu m CMOS process. The readout circuit offers lower noise and wider dynamic range compared with the conventional transimpedance amplifier architecture. The operational amplifier achieves a 118.3-dB gain and 47.3 degrees phase margin. The readout circuit dc response for input range of 5-30 mu A gives a linear output voltage range of 0.21-1.38 V. The total output rms noise is measured to be 6.6 mV(rms). It is applied for a microneedle glucose sensor and has a mean error of 1.6% and consumes 5.1 mW of power. The total area of the proposed readout circuit is 300 mu m x 167 mu m.
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