A new sensitivity organic vertical nano-junctions (VNJ) sensor for ammonia detection and its readout system are presented in this study. The designed ammonia sensor, VNJP3HT diode, is a simple structure with real-time response, high reproducibility and low-cost sensor. Along with the designed sensor, a precision and robust readout circuit is designed and successfully implemented as the proposed chip in this study. To utilize for a novel organic bio-chip, a particular readout system is presented that can acquire signal, compute and display concentration values of ammonia without using microcontroller. The chip is fabricated by the TSMC 0.18-μm 1P6M 3.3V mixed-signal CMOS process technique for verification. Experiment results show that the average resolution is 70.48mV/log (ppm) in a short transient time response, 50 seconds, as compared to prior study, 200 seconds. Error rate, average noise and detection rate reliability are 2.86%, 123 μVrms, and 99.6%, respectively. This chip could be suitable for application in cars, cell phones, watches, etc.
- Information Storage and Processing Systems Division
A 3.2 mW Mixed-Signal Readout Circuit for an Organic Vertical Nano-Junctions Sensor
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Chao, PC, Su, C, Tran, T, & Zan, H. "A 3.2 mW Mixed-Signal Readout Circuit for an Organic Vertical Nano-Junctions Sensor." Proceedings of the ASME 2016 Conference on Information Storage and Processing Systems. ASME 2016 Conference on Information Storage and Processing Systems. Santa Clara, California, USA. June 20–21, 2016. V001T02A007. ASME. https://doi.org/10.1115/ISPS2016-9599
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