@article{CTT100896350, author = {Yuncheng Zhang and Bangan Liu and Teruki Someya and Rui Wu and Junjun Qiu and Atsushi Shirane and Kenichi Okada}, title = {A 0.37mm2 Fully-IntegratedWide Dynamic Range Sub-GHz Receiver Front-end without Off-chip Matching Components," IEICE Transactions on Electronics}, journal = {IEICE Transactions on Electronics}, year = 2022, } @article{CTT100896335, author = {Junjun Qiu and Bangan Liu and Atsushi Shirane and Kenichi Okada}, title = {A Low-power Digital Baseband Circuit for GMSK Demodulation in Sub-GHz Application}, journal = {IEICE Electronics Express}, year = 2022, } @article{CTT100896347, author = {Yuncheng Zhang and Bangan Liu and Junjun Qiu and Atsushi Shirane and Kenichi Okada}, title = {A 1-bit-DSM-based Digital Polar Power Amplifier Supporting 1024-QAM}, journal = {IEEE Solid-State Circuits Letters (SSC-L)}, year = 2022, } @article{CTT100896338, author = {Junjun Qiu and Jian Pang and Bangan Liu and Xueting Luo and Yun Wang and Yuncheng Zhang and Atsushi Shirane and Kenichi Okada}, title = {A CMOS 24-30 GHz Low-Phase-Variation Variable Gain Amplifier Design for 5G New Radio}, journal = {IEEE Solid-State Circuits Letters (SSC-L)}, year = 2022, } @article{CTT100879321, author = {Yun Wang and Dongwon You and Xi Fu and Takeshi Nakamura and Ashbir Aviat Fadila and Teruki Someya and Atsuhiro Kawaguchi and Junjun Qiu and Jian Pang and Kiyoshi Yanagisawa and Bangan Liu and Yuncheng Zhang and Haosheng Zhang and Rui Wu and Shunichiro Masaki and Daisuke Yamazaki and Atsushi Shirane and Kenichi Okada}, title = {A Ka-Band SATCOM Transceiver in 65-nm CMOS with High-Linearity TX and Dual-Channel Wide-Dynamic-Range RX for Terrestrial Termina}, journal = {IEEE Journal of Solid-State Circuits}, year = 2022, } @article{CTT100879342, author = {Junjun Qiu and Zheng Sun and Bangan Liu and Wenqian Wang and Dingxin Xu and Hans Herdian and Hongye Huang and Yuncheng Zhang and Yun Wang and Jian Pang and Hanli Liu and Masaya Miyahara and Atsushi Shirane and Kenichi Okada}, title = {A 32kHz-Reference 2.4GHz Fractional-N Oversampling PLL with 200kHz Loop Bandwidth}, journal = {IEEE Journal of Solid-State Circuits}, year = 2021, } @article{CTT100898570, author = {Jian Pang and Zheng Li and Ryo Kubozoe and Xueting Luo and Rui Wu and Yun Wang and Dongwon You and Ashbir Aviat Fadila and Rattanan Saengchan and Takeshi Nakamura and Joshua Alvin and Daiki Matsumoto and Bangan Liu and Aravind Tharayil Narayanan and Junjun Qiu and Hanli Liu and Zheng Sun and Hongye Huang and Korkut Kaan Tokgoz and K. Motoi and N. Oshima and S. Hori and K. Kunihiro and T. Kaneko and A. Shirane and K. Okada}, title = {A 28-GHz CMOS Phased-Array Beamformer Utilizing Neutralized Bi-Directional Technique Supporting Dual-Polarized MIMO for 5G NR}, journal = {IEEE Journal of Solid-State Circuits}, year = 2020, } @article{CTT100841926, author = {Yun Wang and Rui Wu and Jian Pang and Dongwon You and Ashbir Aviat Fadila and Rattanan Saengchan and Xi Fu and Daiki Matsumoto and Takeshi Nakamura and Ryo Kubozoe and Masaru Kawabuchi and Bangan Liu and Haosheng Zhang and Junjun Qiu and Hanli Liu and Naoki Oshima and Keiichi Motoi and Shinichi Hori and Kazuaki Kunihiro and Tomoya Kaneko and Atsushi Shirane and Kenichi Okada}, title = {A 39-GHz 64-Element Phased-Array Transceiver with Built-in Phase and Amplitude Calibration for Large-Array 5G NR in 65-nm CMOS}, journal = {IEEE Journal of Solid-State Circuits}, year = 2020, } @article{CTT100841925, author = {Bangan Liu and Yuncheng Zhang and Junjun Qiu and Hongye Huang and Zheng Sun and Dingxin Xu and Haosheng Zhang and Yun Wang and Jian Pang and Zheng Li and Xi Fu and Atsushi Shirane and Hitoshi Kurosu and Yoshinori Nakane and Shunichiro Masaki and Kenichi Okada}, title = {A Fully-Synthesizable Fractional-N Injection-Locked PLL for Digital Clocking with Triangle/Sawtooth Spread-Spectrum Modulation Capability in 5-nm CMOS}, journal = {IEEE Solid-State Circuits Letters}, year = 2020, } @article{CTT100796054, author = {Bangan Liu and Huy Cu Ngo and Kengo Nakata and Wei Deng and Yuncheng Zhang and Junjun Qiu and Toru Yoshioka and Jun Emmei and Jian Pang and Tn Aravind and Haosheng Zhang and Dongsheng Yang and Hanli Liu and Teruki Someya and Atsushi Shirane and Kenichi Okada}, title = {A 0.4ps-Jitter -52dBc-Spur Synthesizable Injection-locked PLL with Self-clocked Non-overlap Update and Slope-balanced Sub-sampling BBPD}, journal = {IEEE Solid-State Circuits Letters (SSC-L)}, year = 2019, } @inproceedings{CTT100918310, author = {Wenqian Wang and Junjun Qiu and 白根 篤史 and 岡田 健一}, title = {A Comparator-based Gain Boosted PD Design for 32kHz Reference Oversampling PLL}, booktitle = {}, year = 2024, } @inproceedings{CTT100918091, author = {Dingxin Xu and Zezheng Liu and Yifeng Kuai and Hongye Huang and Yuncheng Zhang and Zheng Sun and Bangan Liu and Wenqian Wang and Yuang Xiong and Junjun Qiu and Waleed Madany and Yi Zhang and Ashbir Aviat Fadila and Atsushi Shirane and Kenichi Okada}, title = {A 7GHz Digital PLL with Cascaded Fractional Divider and Pseudo-Differential DTC Achieving -62.1dBc Fractional Spur and 143.7fs Integrated Jitter}, booktitle = {}, year = 2024, } @inproceedings{CTT100918101, author = {Waleed Madany and Yuncheng Zhang and Ashbir Aviat Fadila and Hongye Huang and Junjun Qiu and Atsushi Shirane and Kenichi Okada}, title = {A Fully Synthesizable DPLL with Background Gain Mismatch Calibrated Feedforward Phase Noise Cancellation Path}, booktitle = {}, year = 2023, } @inproceedings{CTT100918337, author = {Yuncheng Zhang and Zheng Sun and Bangan Liu and Junjun Qiu and Dingxin Xu and Yi Zhang and Xi Fu and Dongwon You and Hongye Huang and Waleed Madany and Ashbir Aviat Fadila and Zezheng Liu and Wenqian Wang and Yuang Xiong and Atsushi Shirane and Kenichi Okada}, title = {A Time-Mode-Modulation Digital Quadrature Power Amplifier Based on 1-bit DSM and Transformer Combined FIR}, booktitle = {}, year = 2023, } @inproceedings{CTT100918279, author = {Dingxin Xu and Yuncheng Zhang and Hongye Huang and Zheng Sun and Bangan Liu and Ashbir Aviat Fadila and Junjun Qiu and Zezheng Liu and Wenqian Wang and Yuang Xiong and Waleed Madany and Atsushi Shirane and Kenichi Okada}, title = {A 6.5-to-8GHz Cascaded Dual-Fractional-N Digital PLL Achieving -63.7dBc Fractional Spurs with 50MHz Reference}, booktitle = {}, year = 2023, } @inproceedings{CTT100896141, author = {Junjun Qiu and Wenqian Wang and Zheng Sun and Bangan Liu and Yuncheng Zhang and Dingxin Xu and Hongye Huang and Ashbir Aviat Fadila and Zezheng Liu and Waleed Madany and Yuang Xiong and Atsushi Shirane and Kenichi Okada}, title = {A 32kHz-Reference 2.4GHz Fractional-N Nonuniform Oversampling PLL with Gain Boosted PD and Loop Gain Calibration}, booktitle = {}, year = 2023, } @inproceedings{CTT100879419, author = {. Zheng Sun and Dingxin Xu and Junjun Qiu and Zezheng Liu and Yuncheng Zhang and Hongye Huang and Hanli Liu and Bangan Liu and Zheng Li and Jian Pang and Atsushi Shirane and Kenichi Okada}, title = {A 0.25mm2 BLE Transmitter with Direct Antenna Interface and 19% System Efficiency Using Duty-Cycled Edge-Timing Calibration}, booktitle = {}, year = 2021, } @inproceedings{CTT100879512, author = {Junjun Qiu and Zheng Sun and Bangan Liu and Wenqian Wang and Dingxin Xu and Hans Herdian and Hongye Huang and Yuncheng Zhang and Yun Wang and Atsushi Shirane and Kenichi Okada}, title = {200kHzループ帯域幅の32kHzリファレンス2.4GHzフラクショナルNオーバーサンプリングPLL}, booktitle = {}, year = 2021, } @inproceedings{CTT100841940, author = {Zheng Sun and Dingxin Xu and Junjun Qiu and Atsushi Shirane and Kenichi Okada}, title = {A 0.38mm2 BLE Transmitter with 29% System Efficiency Using Duty-Cycled Edge-Timing Calibration in 65nm CMOS}, booktitle = {}, year = 2021, } @inproceedings{CTT100841938, author = {Junjun Qiu and Zheng Sun and Bangan Liu and Wenqian Wang and Dingxin Xu and Hans Herdian and Hongye Huang and Yuncheng Zhang and Yun Wang and Atsushi Shirane and Kenichi Okada}, title = {A 32kHz-Reference 2.4GHz Fractional-N Oversampling PLL with 200kHz Loop Bandwidth}, booktitle = {}, year = 2021, } @inproceedings{CTT100841992, author = {Junjun Qiu and Bangan Liu and Yuncheng Zhang and 染谷 晃基 and 白根 篤史 and 岡田 健一}, title = {Digital Baseband Design for Sub-GHz Transceiver}, booktitle = {}, year = 2019, } @inproceedings{CTT100841994, author = {Bangan Liu and Yuncheng Zhang and Junjun Qiu and Wei Deng and Zule Xu and Haosheng Zhang and Jian Pang and Yun Wang and Rui Wu and 染谷 晃基 and 白根 篤史 and 岡田 健一}, title = {A 21.7% System Power Efficiency Fully-Synthesizable Transmitter for sub-GHz IoT Applications}, booktitle = {}, year = 2019, } @inproceedings{CTT100841949, author = {Yun Wang and Rui Wu and Jian Pang and Dongwon You and Ashbir Aviat Fadila and Rattanan Saengchan and Xi Fu and Daiki Matsumoto and Takeshi Nakamura and Ryo Kubozoe and Masaru Kawabuchi and Bangan Liu and Haosheng Zhang and Junjun Qiu and Hanli Liu and Naoki Oshima and Keiichi Motoi and Shinichi Hori and Kazuaki Kunihiro and Tomoya Kaneko and Atsushi Shirane and Kenichi Okada}, title = {A 39GHz Phased-Array CMOS Transceiver with Built-in Calibration for Large-Array 5G NR}, booktitle = {}, year = 2019, } @inproceedings{CTT100841945, author = {Bangan Liu and Yuncheng Zhang and Junjun Qiu and Wei Deng and Zule Xu and Haosheng Zhang and Jian Pang and Yun Wang and Rui Wu and Teruki Someya and Atsushi Shirane and Kenichi Okada}, title = {An HDL-described Fully-synthesizable Sub-GHz IoT Transceiver with Ring Oscillator Based Frequency Synthesizer and Digital Background EVM Calibration}, booktitle = {}, year = 2019, } @inproceedings{CTT100815508, author = {Junjun Qiu and Bangan Liu and Yuncheng Zhang and Teruki Someya and Atsushi Shirane and Kenichi Okada}, title = {A Fully-synthesizable Symbol Timing Recovery Circuit for Low-Power Wireless Receiver}, booktitle = {}, year = 2019, } @inproceedings{CTT100815503, author = {Yuncheng Zhang and Bangan Liu and Junjun Qiu and Teruki Someya and Atsushi Shirane and Kenichi Okada}, title = {A Low-Power Area Efficient Sub-GHz IoT Receiver without Off-Chip Components}, booktitle = {}, year = 2019, } @inproceedings{CTT100815509, author = {Bangan Liu and Yuncheng Zhang and Junjun Qiu and Teruki Someya and Atsushi Shirane and Kenichi Okada}, title = {A Fully-synthesizable Ring Oscillator Based Frequency Synthesizer for Sub-GHz IoT Application}, booktitle = {}, year = 2019, } @inproceedings{CTT100816257, author = {Jian Pang and Zheng Li and 窪添 諒 and Xueting Luo and Rui Wu and Yun Wang and Dongwon You and Ashbir Aviat Fadila and Rattanan Saengchan and 中村 岳資 and Joshua Alvin and 松本 大輝 and THARAYILNAARAVIND and Bangan Liu and Junjun Qiu and Hanli Liu and Zheng Sun and Hongye Huang and 白根 篤史 and 岡田 健一}, title = {双方向動作可能な5GNR二偏波MIMO対応28GHz帯CMOSフェーズドアレイ無線機}, booktitle = {}, year = 2019, } @inproceedings{CTT100814784, author = {Bangan Liu and Huy Cu Ngo and Wei Deng and Yuncheng Zhang and Junjun Qiu and Kengo Nakata and Teruki Someya and Atsushi Shirane and Kenichi Okada}, title = {A 1.2 ps-Jitter Fully-Synthesizable DTC-based Fractional-N Injection-Locked PLL using True Arbitrary Nonlinearity Calibration}, booktitle = {}, year = 2018, } @inproceedings{CTT100814775, author = {Bangan Liu and Huy Cu Ngo and Yuncheng Zhang and Junjun Qiu and 中田 憲吾 and 白根 篤史 and 岡田 健一}, title = {A Fully-Synthesizable Fractional-N Injection-Locked PLL Using True Arbitrary Nonlinearity Calibration Technique}, booktitle = {}, year = 2018, } @inproceedings{CTT100816255, author = {Bangan Liu and Huy Cu Ngo and Kengo Nakata and Wei Deng and Yuncheng Zhang and Junjun Qiu and Toru Yoshioka and Jun Emmei and Haosheng Zhang and Jian Pang and Tn Aravind and Dongsheng Yang and Hanli Liu and Kenichi Okada and Akira Matsuzawa}, title = {A 1.2 ps-Jitter Fully-Synthesizable Fully-Calibrated Fractional-N Injection-Locked PLL Using True Arbitrary Nonlinearity Calibration Technique}, booktitle = {}, year = 2018, } @inproceedings{CTT100790069, author = {Junjun Qiu and Bangan Liu and Yuncheng Zhang and Kenichi Okada and Akira Matsuzawa}, title = {An ultra-low-power digital GMSK demodulator for sub-GHz IoT applications}, booktitle = {}, year = 2017, } @misc{CTT100869852, author = {Junjun Qiu}, title = {A Study of Fractional-N Oversampling Frequency Synthesizers Using Digital-Assisted Calibration}, year = 2022, } @misc{CTT100869850, author = {Junjun Qiu}, title = {A Study of Fractional-N Oversampling Frequency Synthesizers Using Digital-Assisted Calibration}, year = 2022, } @misc{CTT100869854, author = {Junjun Qiu}, title = {A Study of Fractional-N Oversampling Frequency Synthesizers Using Digital-Assisted Calibration}, year = 2022, } @misc{CTT100901958, author = {Junjun Qiu}, title = {A Study of Fractional-N Oversampling Frequency Synthesizers Using Digital-Assisted Calibration}, year = 2022, } @phdthesis{CTT100869852, author = {Junjun Qiu}, title = {A Study of Fractional-N Oversampling Frequency Synthesizers Using Digital-Assisted Calibration}, school = {東京工業大学}, year = 2022, } @phdthesis{CTT100869850, author = {Junjun Qiu}, title = {A Study of Fractional-N Oversampling Frequency Synthesizers Using Digital-Assisted Calibration}, school = {東京工業大学}, year = 2022, } @phdthesis{CTT100869854, author = {Junjun Qiu}, title = {A Study of Fractional-N Oversampling Frequency Synthesizers Using Digital-Assisted Calibration}, school = {東京工業大学}, year = 2022, } @phdthesis{CTT100901958, author = {Junjun Qiu}, title = {A Study of Fractional-N Oversampling Frequency Synthesizers Using Digital-Assisted Calibration}, school = {東京工業大学}, year = 2022, }