@inproceedings{2165917b1c26445a98aca5d08bfd7ad2,
title = "A 10-bit, 771 nW Time-Mode ADC with a 2-Step TDC for Bio-Signal Acquisition",
abstract = "In this paper, we present the design of a low-voltage, low-power, and small-area time-mode ADC (TM-ADC) for bio-signal sensing applications. The proposed time-mode ADC (TM-ADC) consists of a programmable oversampling ratio (OSR), voltage-controlled ring oscillator (VCRO) based analog-to-time converter (ATC), followed by an asynchronous unfolded SAR coarse TDC and an asynchronous, enhanced-range fine flash TDC. The integrated circuit has been implemented in a standard CMOS 65 nm process and its performance has been evaluated through extracted transient noise simulations. The ADC consumes 771 nW at a sampling rate of 2.2 kHz from a 0.5V supply voltage and achieves 10-bit resolution in a total area of 0.014 mm2. The simulation results indicate DNL and INL values of +0.86/-0.83 and +0.88/-1.79, respectively, an SNDR of 60.7 dB and an ENOB of 9.8 bits for a 10mV peak-to-peak signal 1kHz input signal.",
keywords = "Bio-signal sensing, time-mode operation, analog-to-time conversion, two-step, time-to-digital conversion",
author = "Emmanouil Kandilakis and Serdijn, {Wouter A.} and Akgun, {Omer Can}",
year = "2021",
doi = "10.1109/BioCAS49922.2021.9644997",
language = "English",
isbn = "978-1-7281-7205-7",
series = "BioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings",
publisher = "IEEE",
pages = "1--6",
booktitle = "BioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings",
address = "United States",
note = "2021 IEEE Biomedical Circuits and Systems Conference (BioCAS) ; Conference date: 06-10-2021 Through 09-10-2021",
}