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Computer Science > Hardware Architecture

arXiv:2402.03533 (cs)
[Submitted on 5 Feb 2024]

Title:A 0.5V, 6.2$μ$W, 0.059mm$^{2}$ Sinusoidal Current Generator IC with 0.088% THD for Bio-Impedance Sensing

Authors:Kwantae Kim, Changhyeon Kim, Sungpill Choi, Hoi-Jun Yoo
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Abstract:This paper presents the first sub-10$\mu$W, sub-0.1% total harmonic distortion (THD) sinusoidal current generator (CG) integrated circuit (IC) that is capable of 20kHz output for the bio-impedance (Bio-Z) sensing applications. To benefit from the ultra-low-power nature of near-threshold operation, a 9b pseudo-sine lookup table (LUT) is 3b $\Delta\Sigma$ modulated in the digital domain, thus linearity burden of the digital-to-analog converter (DAC) is avoided and only a 1.29$\mu$W of logic power is consumed, from a 0.5V supply and a 2.56MHz clock frequency. A half-period (HP) reset is introduced in the capacitive DAC, leading to around 30dB reduction of in-band noise by avoiding the sampling of data-dependent glitches and attenuating the kT/C noise and the non-idealities of reset switches (SW).
Comments: 5 pages, 8 figures, 1 table, 2020 IEEE Symposium on VLSI Circuits
Subjects: Hardware Architecture (cs.AR)
Cite as: arXiv:2402.03533 [cs.AR]
  (or arXiv:2402.03533v1 [cs.AR] for this version)
  https://doi.org/10.48550/arXiv.2402.03533
Related DOI: https://doi.org/10.1109/VLSICircuits18222.2020.9162983

Submission history

From: Kwantae Kim [view email]
[v1] Mon, 5 Feb 2024 21:43:30 UTC (4,703 KB)
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