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L. Feng, W. Rhee, and Z. Wang, “A Quantization noise reduction method for delta-sigma fractional-N PLLs using cascaded injection-locked oscillators,” IEEE Trans. Circuits and Systems II, vol. 69, pp. 2448-2452, May 2022. M. Ni, X. Wang, F. Li, W. Rhee, and Z. Wang, “A 13-Bit 2-GS/s time-interleaved ADC with improved correlation-based timing skew calibration strategy,” IEEE Trans. Circuits and Systems I, vol. 69. pp. 481-494, Feb., 2022 B. Wang, H. Song, W. Rhee, and Z. Wang, “Overview of ultra-wideband transceivers— system architectures and applications,” Tsinghua Science and Technology, vol. 27, no. 3, pp. 481-494, Nov. 2021. X. Xu, Z. Wang, W. Rhee, and Z. Wang, “A bias-current-free fractional-N hybrid PLL for low-voltage clock generation,” IEEE Trans. Circuits and Systems I, vol. 68, pp. 3611-3620, Sept. 2021. J. Zhao, Y. Zhang, K. Zeng, W. Rhee, and Z. Wang, “A 2.4-GHz crystal-less GFSK receiver using an auxiliary multiphase BBPLL for digital output demodulation with enhanced frequency scaling,” IEEE Trans. Circuits and Systems II, vol. 68, pp. 1143-1147, Apr. 2021. C. Ding, B. Wang, H. Song, W. Rhee, and Z. Wang, “A 3.5-GHz 0.24-nJ/b 100-Mb/s fully balanced FSK receiver with sideband energy detection,” IEEE Solid-State Circuits Letters, vol. 4, 2021. X. Zheng et al., “Frequency-domain modeling and analysis of injection-locked oscillators,” IEEE Journal of Solid-State Circuits. vol. 55, pp. 1651-1664, June 2020. H. Song, D. Liu, Y. Zhang, W. Rhee, and Z. Wang, “A 6.5–8.1-GHz communication/ranging VWB transceiver for secure wireless connectivity with enhanced bandwidth efficiency and ΔΣ energy detection,” IEEE Journal of Solid-State Circuits, vol. 55, pp. 219-232, Feb. 2020. Z. Ding, X. Xu, H. Song, W. Rhee, and Z. Wang, “Flash ADC based digital LDO with nonlinear decoder and exponential-ratio array,” Electronic Letters, vol. 55, no. 10, pp. 585- 587, May 2019. Y. Zhang, N. Meng, X. Huang, W. Rhee, and Z. Wang, “A 3.7-mW 2.4-GHz phase-tracking GFSK receiver with BBPLL-based demodulation,” IEEE Journal of Solid-State Circuits, vol. 54, pp. 336-345, Feb. 2019. Y. Zhang, H. Song, R. Zhou, W. Rhee, I. Shim, and Z. Wang, “A capacitor-less ripple-less hybrid LDO with exponential ratio array and 4000x load current range,” IEEE Trans. Circuits and Systems II, vol. 66, pp. 36-40, Jan. 2019. F. Lin, Z. Song, N. Qi, W. Rhee, and B. Chi, “A 77-GHz mixed-mode FMCW signal generator based on bang-bang phase detector,” IEEE Journal of Solid-State Circuits, vol. 53, pp. 2850-2863, Oct. 2018. Y. Guo et al., “A 120 pJ/bit ΔΣ-Based 2.4-GHz transmitter using FIR-embedded digital power amplifier,” IEEE Trans. Circuits and Systems II, vol. 65, pp. 1854-1858, Dec. 2018. X. Huang, D. Liu, W. Rhee, and Z. Wang, “A 1-GHz 1.6-mW auto-calibrated bit slicer for energy/envelope detection receivers,” IEEE Trans. Circuits and Systems II, vol. 65, pp. 587- 591, May 2018. F. Chen, W. Rhee, and Z. Wang “A 5 mW 750 kb/s noninvasive transceiver for around-thehead audio applications,” IEEE Trans. Circuits and Systems II, vol. 65, pp. 196-200, Feb. 2018. Z. Weng et al., “400 MHz/2.4 GHz combo WPAN transceiver IC for simultaneous dualband communication with one single antenna,” IEEE Trans. Circuits and Systems I, vol. 65, pp. 745-757, Feb. 2018. Y. Zhang, R. Zhou, W. Rhee, and Z. Wang, “A 1.9 mW 750 kb/s 2.4 GHz F-OOK transmitter with symmetric FM template and high-point modulation PLL,” IEEE Journal of Solid-State Circuits, vol. 52, pp. 2627-2735, Oct. 2017. X. Li, S. Lv, W. Rhee, W. Jia, and Z. Wang, “A 20 Mb/s GFSK modulator based on a 3.6 GHz hybrid PLL with 3-bit DCO nonlinearity calibration and independent delay mismatch control,” IEEE Trans. Microwave Theory and Techniques, vol. 65, pp. 2387-2398, July 2017. D. Liu, X. Ni, R. Zhou, W. Rhee, and Z. Wang, “A 0.42 mW 1 Mb/s 3-to-4 GHz transceiver in 0.18 m CMOS with flexible efficiency, bandwidth and distance control for IoT applications,” IEEE Journal of Solid-State Circuits, vol. 52, pp. 1479-1494, June 2017. X. Chen, Y. Shen, Z. Wang, W. Rhee, and Z. Wang, “A 17 mW 3-to-5 GHz duty-cycled vital sign detection radar transceiver with frequency hopping and time-domain oversampling,” IEEE Trans. Circuits and Systems I, vol. 64, pp. 969-980, Apr. 2017. H. Song, W. Rhee, I. Shim, and Z. Wang, “Digital LDO with 1-bit modulation for low voltage clock generation systems,” Electronic Letters, vol. 52, no. 25, pp. 2034-2036, Dec. 2016.