https://scholars.lib.ntu.edu.tw/handle/123456789/633780
標題: | An Open-loop VCO-based ADC with Quasi-Chopping and Non-linearity Cancellation for Bio-Sensor Applications | 作者: | Chen, Chien Liang TSUNG-HSIEN LIN |
關鍵字: | analog-to-digital converter (ADC) | nonlinearity cancellation (NLC) | quasi chopper | trans-conductor | voltage-controlled oscillator | 公開日期: | 1-一月-2022 | 來源出版物: | BioCAS 2022 - IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Systems for a Better Future, Proceedings | 摘要: | An open-loop VCO-based ADC with quasi-chopping for bio-sensor applications is reported in this paper. The VCO is implemented as a trans-conductor (Gm) stage followed by a current-controlled oscillator (CCO). The proposed Gm circuit is designed to accommodate a large input range. This work also adopts a quasi-chopping technique that suppresses low-frequency noise while performing demodulation in the digital domain. The off-chip non-linearity cancellation (NLC) algorithm further improves the overall linearity. The proposed chip is fabricated in the TSMC 180-nm process. The core area of the chip is 0.26 mm2. The total power consumption is 0.65 mW. With an input of 1.52 Vpp, the ENOB is 9.3 with a 100-kHz bandwidth. The ADC achieves a FoMs of 140 dB and FoMw of 5.1 pJ/conv. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/633780 | ISBN: | 9781665469173 | DOI: | 10.1109/BioCAS54905.2022.9948693 |
顯示於: | 電機工程學系 |
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