A 05V, 62$\mu$W, 0059mm$^2$ Sinusoidal Current Generator IC with 0088% THD for Bio-Impedance Sensing
<|reference_start|>A 05V, 62$\mu$W, 0059mm$^2$ Sinusoidal Current Generator IC with 0088% THD for Bio-Impedance Sensing: 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).<|reference_end|>
@article{kim2024a,
    title={A 0.5V, 6.2$\mu$W, 0.059mm$^{2}$ Sinusoidal Current Generator IC with
  0.088% THD for Bio-Impedance Sensing},
    author={Kwantae Kim, Changhyeon Kim, Sungpill Choi, Hoi-Jun Yoo},
    journal={arXiv preprint arXiv:2402.03533},
    year={2024},
    doi={10.1109/VLSICircuits18222.2020.9162983},
    archivePrefix={arXiv},
    eprint={2402.03533},
    primaryClass={cs.AR}
}