Junjun Qiu

23 papers Journal 12Unranked 11
YearRankTypeTitle / Venue / Authors
2025 J jnl
A 0.8-1.4-GHz Synthesizable DPLL Using a Background Gain Mismatch Calibrated Feedforward Phase Noise Cancellation.
IEEE Access
Waleed Madany, Yuncheng Zhang, Ashbir Aviat Fadila, Hongye Huang, Junjun Qiu, Jill C. Mayeda, Atsushi Shirane, Kenichi Okada
2025 J jnl
A 6.5-to-8-GHz Cascaded Dual-Fractional-N Digital PLL Achieving -52.79-dBc Fractional Spur With 50-MHz Reference.
IEEE J. Solid State Circuits
Dingxin Xu, Yuncheng Zhang, Hongye Huang, Zheng Sun, Bangan Liu, Ashbir Aviat Fadila, Junjun Qiu, Zezheng Liu, Wenqian Wang, Yuang Xiong, Waleed Madany, Atsushi Shirane, Kenichi Okada
2025 J jnl
A DPD/Dither-Free DPLL Based on a Cascaded Fractional Divider and Pseudo-Differential DTCs Achieving a - 62.1-dBc Fractional Spur.
IEEE J. Solid State Circuits
Dingxin Xu, Zezheng Liu, Yifeng Kuai, Hongye Huang, Yuncheng Zhang, Zheng Sun, Bangan Liu, Wenqian Wang, Yuang Xiong, Junjun Qiu, Waleed Madany, Yi Zhang, Ashbir Aviat Fadila, Atsushi Shirane, Kenichi Okada
2024 — conf
10.3 A 7GHz Digital PLL with Cascaded Fractional Divider and Pseudo-Differential DTC Achieving -62.1dBc Fractional Spur and 143.7fs Integrated Jitter.
ISSCC
Dingxin Xu, Zezheng Liu, Yifeng Kuai, Hongye Huang, Yuncheng Zhang, Zheng Sun, Bangan Liu, Wenqian Wang, Yuang Xiong, Junjun Qiu, Waleed Madany, Yi Zhang, Ashbir Aviat Fadila, Atsushi Shirane, Kenichi Okada
2024 J jnl
A Time-Mode-Modulation Digital Quadrature Power Amplifier Based on 1-bit Delta-Sigma Modulator and Hybrid FIR Filter.
IEEE J. Solid State Circuits
Yuncheng Zhang, Zheng Sun, Bangan Liu, Junjun Qiu, Dingxin Xu, Yi Zhang, Xi Fu, Dongwon You, Hongye Huang, Waleed Madany, Ashbir Aviat Fadila, Zezheng Liu, Wenqian Wang, Yuang Xiong, Atsushi Shirane, Kenichi Okada
2024 J jnl
A synthesizable spread spectrum clock generator based on type-II/III fractional-
IEICE Electron. Express
Waleed Madany, Hongye Huang, Bangan Liu, Ashbir Aviat Fadila, Zezheng Liu, Wenqian Wang, Junjun Qiu, Jill C. Mayeda, Atsushi Shirane, Kenichi Okada
2023 — conf
A 32kHz-Reference 2.4GHz Fractional-N Nonuniform Oversampling PLL with Gain-Boosted PD and Loop-Gain Calibration.
ISSCC
Junjun Qiu, Wenqian Wang, Zheng Sun, Bangan Liu, Yuncheng Zhang, Dingxin Xu, Hongye Huang, Ashbir Aviat Fadila, Zezheng Liu, Waleed Madany, Yuang Xiong, Atsushi Shirane, Kenichi Okada
2023 — conf
A 6.5-to-8GHz Cascaded Dual-Fractional-N Digital PLL Achieving -63.7dBc Fractional Spurs with 50MHz Reference.
CICC
Dingxin Xu, Yuncheng Zhang, Hongye Huang, Zheng Sun, Bangan Liu, Ashbir Aviat Fadila, Junjun Qiu, Zezheng Liu, Wenqian Wang, Yuang Xiong, Waleed Madany, Atsushi Shirane, Kenichi Okada
2023 — conf
A Fully Synthesizable DPLL with Background Gain Mismatch Calibrated Feedforward Phase Noise Cancellation Path.
ESSCIRC
Waleed Madany, Yuncheng Zhang, Ashbir Aviat Fadila, Hongye Huang, Junjun Qiu, Atsushi Shirane, Kenichi Okada
2023 — conf
A Time-Mode-Modulation Digital Quadrature Power Amplifier Based on 1-bit Delta-Sigma Modulator and Transformer Combined FIR FIlter.
VLSI Technology and Circuits
Yuncheng Zhang, Zheng Sun, Bangan Liu, Junjun Qiu, Dingxin Xu, Yi Zhang, Xi Fu, Dongwon You, Hongye Huang, Waleed Madany, Ashbir Aviat Fadila, Zezheng Liu, Wenqian Wang, Yuang Xiong, Atsushi Shirane, Kenichi Okada
2022 J jnl
A 0.37mm
IEICE Trans. Electron.
Yuncheng Zhang, Bangan Liu, Teruki Someya, Rui Wu, Junjun Qiu, Atsushi Shirane, Kenichi Okada
2022 J jnl
A Ka-Band SATCOM Transceiver in 65-nm CMOS With High-Linearity TX and Dual-Channel Wide-Dynamic-Range RX for Terrestrial Terminal.
IEEE J. Solid State Circuits
Yun Wang, Dongwon You, Xi Fu, Takeshi Nakamura, Ashbir Aviat Fadila, Teruki Someya, Atsuhiro Kawaguchi, Junjun Qiu, Jian Pang, Kiyoshi Yanagisawa, Bangan Liu, Yuncheng Zhang, Haosheng Zhang, Rui Wu, Shunichiro Masaki, Daisuke Yamazaki, Atsushi Shirane, Kenichi Okada
2022 J jnl
A low-power digital baseband circuit for GMSK demodulation in sub-GHz application.
IEICE Electron. Express
Junjun Qiu, Bangan Liu, Yuncheng Zhang, Atsushi Shirane, Kenichi Okada
2021 — conf
32.7 A 32kHz-Reference 2.4GHz Fractional-N Oversampling PLL with 200kHz Loop Bandwidth.
ISSCC
Junjun Qiu, Zheng Sun, Bangan Liu, Wenqian Wang, Dingxin Xu, Hans Herdian, Hongye Huang, Yuncheng Zhang, Yun Wang, Atsushi Shirane, Kenichi Okada
2021 — conf
A 0.25 mm
ESSCIRC
Zheng Sun, Dingxin Xu, Junjun Qiu, Zezheng Liu, Yuncheng Zhang, Hongye Huang, Hanli Liu, Bangan Liu, Zheng Li, Jian Pang, Atsushi Shirane, Kenichi Okada
2021 J jnl
A 32-kHz-Reference 2.4-GHz Fractional-N Oversampling PLL With 200-kHz Loop Bandwidth.
IEEE J. Solid State Circuits
Junjun Qiu, Zheng Sun, Bangan Liu, Wenqian Wang, Dingxin Xu, Hans Herdian, Hongye Huang, Yuncheng Zhang, Yun Wang, Jian Pang, Hanli Liu, Masaya Miyahara, Atsushi Shirane, Kenichi Okada
2021 J jnl
A Fully Synthesizable Fractional-N MDLL With Zero-Order Interpolation-Based DTC Nonlinearity Calibration and Two-Step Hybrid Phase Offset Calibration.
IEEE Trans. Circuits Syst. I Regul. Pap.
Bangan Liu, Yuncheng Zhang, Junjun Qiu, Huy Cu Ngo, Wei Deng, Kengo Nakata, Toru Yoshioka, Jun Emmei, Jian Pang, Aravind Tharayil Narayanan, Haosheng Zhang, Teruki Someya, Atsushi Shirane, Kenichi Okada
2020 J jnl
A 28-GHz CMOS Phased-Array Beamformer Utilizing Neutralized Bi-Directional Technique Supporting Dual-Polarized MIMO for 5G NR.
IEEE J. Solid State Circuits
Jian Pang, Zheng Li, Ryo Kubozoe, Xueting Luo, Rui Wu, Yun Wang, Dongwon You, Ashbir Aviat Fadila, Rattanan Saengchan, Takeshi Nakamura, Joshua Alvin, Daiki Matsumoto, Bangan Liu, Aravind Tharayil Narayanan, Junjun Qiu, Hanli Liu, Zheng Sun, Hongye Huang, Korkut Kaan Tokgoz, Keiichi Motoi, Naoki Oshima, Shinichi Hori, Kazuaki Kunihiro, Tomoya Kaneko, Atsushi Shirane, Kenichi Okada
2020 — conf
A 29% PAE 1.5Bit-DSM-Based Polar Transmitter with Spur-Mitigated Injection-Locked PLL.
VLSI Circuits
Yuncheng Zhang, Bangan Liu, Xiaofan Gu, Chun Wang, Kiyoshi Yanagisawa, Junjun Qiu, Yun Wang, Jian Pang, Atsushi Shirane, Kenichi Okada
2020 J jnl
A 39-GHz 64-Element Phased-Array Transceiver With Built-In Phase and Amplitude Calibrations for Large-Array 5G NR in 65-nm CMOS.
IEEE J. Solid State Circuits
Yun Wang, Rui Wu, Jian Pang, Dongwon You, Ashbir Aviat Fadila, Rattanan Saengchan, Xi Fu, Daiki Matsumoto, Takeshi Nakamura, Ryo Kubozoe, Masaru Kawabuchi, Bangan Liu, Haosheng Zhang, Junjun Qiu, Hanli Liu, Naoki Oshima, Keiichi Motoi, Shinichi Hori, Kazuaki Kunihiro, Tomoya Kaneko, Atsushi Shirane, Kenichi Okada
2019 — conf
A 28GHz CMOS Phased-Array Beamformer Utilizing Neutralized Bi-Directional Technique Supporting Dual-Polarized MIMO for 5G NR.
ISSCC
Jian Pang, Zheng Li, Ryo Kubozoe, Xueting Luo, Rui Wu, Yun Wang, Dongwon You, Ashbir Aviat Fadila, Rattanan Saengchan, Takeshi Nakamura, Joshua Alvin, Daiki Matsumoto, Aravind Tharayil Narayanan, Bangan Liu, Junjun Qiu, Hanli Liu, Zheng Sun, Hongye Huang, Korkut Kaan Tokgoz, Keiichi Motoi, Naoki Oshima, Shinichi Hori, Kazuaki Kunihiro, Tomoya Kaneko, Atsushi Shirane, Kenichi Okada
2019 — conf
An HDL-described Fully-synthesizable Sub-GHz IoT Transceiver with Ring Oscillator based Frequency Synthesizer and Digital Background EVM Calibration.
CICC
Bangan Liu, Yuncheng Zhang, Junjun Qiu, Wei Deng, Zule Xu, Haosheng Zhang, Jian Pang, Yun Wang, Rui Wu, Teruki Someya, Atsushi Shirane, Kenichi Okada
2018 — conf
A 1.2ps-jitter fully-synthesizable fully-calibrated fractional-N injection-locked PLL using true arbitrary nonlinearity calibration technique.
CICC
Bangan Liu, Huy Cu Ngo, Kengo Nakata, Wei Deng, Yuncheng Zhang, Junjun Qiu, Toru Yoshioka, Jun Emmei, Haosheng Zhang, Jian Pang, Aravind Tharayil Narayanan, Dongsheng Yang, Hanli Liu, Kenichi Okada, Akira Matsuzawa