Electronics Research Laboratory
Dept. of Microelectronics

MSc Y Shen

PhD student
Electronic Circuits and Architectures (ELCA), Department of Microelectronics


Promotor: Leo de Vreede, Morteza Alavi

Projects history

Smart Energy Efficient Digital Communication

SEEDCOM aims for fully integrated energy efficient wideband transmitters

  1. 5.8 A 20W CMOS/LDMOS All-Digital Transmitter with Dynamic Retiming and Glitch-Free Phase Mapper, Achieving 68%/62% Peak Drain/System Efficiency
    Mul, Dieuwert Peter Nicolaas; Bootsman, Rob J; Beikmirza, Mohammadreza; El Boustani, Ossama; Shen, Yiyu; Maassen, Daniel; van Velzen, Bart; Rousstia, Mohadig; Koster, Ronald; Gajadharsing, John R; Fritzsch, Thomas; Alavi, Morteza; De Vreede, Leo C.N.;
    In 2025 IEEE International Solid-State Circuits Conference (ISSCC),
    pp. 104-106, 2025. DOI: 10.1109/ISSCC49661.2025.10904650
    Keywords: ... Base stations;Frequency modulation;Transmitters;Switches;Logic gates;Solid state circuits;Wideband;Signal resolution;Power generation;Switching circuits.

  2. A Wideband Energy-Efficient Multi-Mode CMOS Digital Transmitter
    Beikmirza, Mohammadreza; Shen, Yiyu; de Vreede, Leo C. N.; Alavi, Morteza S.;
    IEEE Journal of Solid-State Circuits,
    Volume 58, Issue 3, pp. 677-690, 2023. DOI: 10.1109/JSSC.2022.3222028
    Keywords: ... Radio frequency;Clocks;Baseband;Wideband;OFDM;Power generation;Mixers;Balun;Cartesian;CMOS;digital power amplifier (DPA);digital pre-distortion (DPD);digital transmitter (DTX);efficient;load insensitive class-E;Marchand;multi-phase;radio frequency digital-to-analog converter (RF-DAC);reactance compensation;re-entrant;wideband.

  3. A Wideband Digital-Intensive Current-Mode Transmitter Line-Up
    Shen, Yiyu; Hoogelander, Martijn; Bootsman, Rob; Alavi, Morteza S.; de Vreede, Leo C. N.;
    IEEE Journal of Solid-State Circuits,
    Volume 58, Issue 9, pp. 2489-2500, 2023. DOI: 10.1109/JSSC.2023.3279235
    Keywords: ... Radio frequency;Linearity;Power amplifiers;Harmonic analysis;Energy efficiency;Power generation;Impedance;Common-gate (CG)/common-base (CB) power amplifier (PA);current division path;digital pre-distortion (DPD)-free;direct-digital RF modulator (DDRM);dynamic biasing;harmonic rejection (HR);IQ-mapping;quadrature up-converter;radio frequency digital-to-analog converter (RFDAC);TX line-up.

  4. A 23.8–30.4-GHz Vector-Modulated Phase Shifter With Two-Stage Current-Reused Variable-Gain Amplifiers Achieving 0.23° Minimum RMS Phase Error
    Zhang, Linghan; Shen, Yiyu; de Vreede, Leo; Babaie, Masoud;
    IEEE Solid-State Circuits Letters,
    Volume 5, pp. 150-153, 2022. DOI: 10.1109/LSSC.2022.3179661
    Keywords: ... Gain;Phase shifters;Layout;Constellation diagram;Complexity theory;Power demand;Bandwidth;Active phase shifter;millimeter-wave (mm-wave);phased-array systems;two-step variable gain amplifier;vector-modulator.

  5. High-Power Digital Transmitters for Wireless Infrastructure Applications (A Feasibility Study)
    Bootsman, Robert J.; Mul, Dieuwert P. N.; Shen, Yiyu; Hashemi, Mohsen; Heeres, Rob M.; van Rijs, Fred; Alavi, Morteza S.; de Vreede, Leo C. N.;
    IEEE Transactions on Microwave Theory and Techniques,
    Volume 70, Issue 5, pp. 2835-2850, 2022. DOI: 10.1109/TMTT.2022.3153000
    Keywords: ... Radio frequency;CMOS technology;Power generation;Logic gates;Transmitters;Threshold voltage;Switches;Class-E;CMOS;digital predistortion (DPD);digital transmitter (DTX);efficient;GaN;high-power RF;laterally-diffused MOS (LDMOS);mixing power digital-to-analog converter (DAC);polar.

  6. A Wideband IQ-Mapping Direct-Digital RF Modulator for 5G Transmitters
    Shen, Yiyu; Bootsman, Robert; Alavi, Morteza S.; de Vreede, Leo C. N.;
    IEEE Journal of Solid-State Circuits,
    Volume 57, Issue 5, pp. 1446-1456, 2022. DOI: 10.1109/JSSC.2022.3144362
    Keywords: ... Radio frequency;Modulation;Computer architecture;Power generation;Microprocessors;Delays;Clocks;Current-steering digital-to-analog converter (DAC);digital pre-distortion (DPD)-free;digital-intensive transmitter (DTX);direct-digital RF modulator (DDRM);I/Q image;IQ-mapping;mixing DAC;PA pre-driver;quadrature up-converter;radio-frequency digital-analog converter (RFDAC).

  7. A Low-Spur Fractional-N PLL Based on a Time-Mode Arithmetic Unit
    Gao, Zhong; He, Jingchu; Fritz, Martin; Gong, Jiang; Shen, Yiyu; Zong, Zhirui; Chen, Peng; Spalink, Gerd; Eitel, Ben; Alavi, Morteza S.; Staszewski, Robert Bogdan; Babaie, Masoud;
    IEEE Journal of Solid-State Circuits,
    pp. 1-20, 2022. DOI: 10.1109/JSSC.2022.3209338

  8. A Four-Way Series Doherty Digital Polar Transmitter at mm-Wave Frequencies
    Mortazavi, Mohsen; Shen, Yiyu; Mul, Dieuwert; de Vreede, Leo C. N.; Spirito, Marco; Babaie, Masoud;
    IEEE Journal of Solid-State Circuits,
    Volume 57, Issue 3, pp. 803-817, 2022. DOI: 10.1109/JSSC.2021.3133861
    Keywords: ... Transformers;Power generation;Impedance;Transmitters;Resistance;Linearity;Baseband;Digital phase modulator (DPM);digital polar transmitter (DPTX);digital power amplifier (DPA);Doherty design guide;millimeter-wave transmitter (TX);power amplifier (PA);series Doherty combiner (SDC).

  9. A 39 W Fully Digital Wideband Inverted Doherty Transmitter
    Bootsman, Robert; Shen, Yiyu; Mul, Dieuwert; Rousstia, Mohadig; Heeres, Rob; van Rijs, Fred; Gajadharsing, John; Alavi, Morteza S.; de Vreede, Leo C.N.;
    In 2022 IEEE/MTT-S International Microwave Symposium - IMS 2022,
    pp. 979-982, 2022. DOI: 10.1109/IMS37962.2022.9865405
    Keywords: ... Radio frequency;Power demand;Three-dimensional displays;Transmitters;Power combiners;Power system harmonics;Harmonic analysis;digital transmitters;LDMOS;CMOS;inverted Doherty;wideband.

  10. A Wideband Two-Way Digital Doherty Transmitter in 40nm CMOS
    Beikmirza, Mohammadreza; Shen, Yiyu; de Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2022 IEEE/MTT-S International Microwave Symposium - IMS 2022,
    pp. 975-978, 2022. DOI: 10.1109/IMS37962.2022.9865506
    Keywords: ... Transmitters;Power combiners;OFDM;Power amplifiers;Microwave amplifiers;Wideband;Power generation;Cartesian;class-E;Doherty;efficient;wideband;digital power amplifier;RF-DAC;DPD;DTX;Balun;CMOS.

  11. A 1-to-4GHz Multi-Mode Digital Transmitter in 40nm CMOS Supporting 200MHz 1024-QAM OFDM signals with more than 23dBm/66% Peak Power/Drain Efficiency
    Beikmirza, Mohammadreza; Shen, Yiyu; de Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2022 IEEE Custom Integrated Circuits Conference (CICC),
    pp. 01-02, 2022. DOI: 10.1109/CICC53496.2022.9772797
    Keywords: ... Transmitters;OFDM;Modulation;Nanoscale devices;Energy efficiency;Delays;Synchronization.

  12. A 1.66Gb/s and 5.8pJ/b Transcutaneous IR-UWB Telemetry System with Hybrid Impulse Modulation for Intracortical Brain-Computer Interfaces
    Song, Minyoung; Huang, Yu; Shen, Yiyu; Shi, Chengyao; Breeschoten, Arjan; Konijnenburg, Mario; Visser, Huib; Romme, Jac; Dutta, Barundeb; Alavi, Morteza S.; Bachmann, Christian; Liu, Yao-Hong;
    In 2022 IEEE International Solid- State Circuits Conference (ISSCC),
    pp. 394-396, 2022. DOI: 10.1109/ISSCC42614.2022.9731608

  13. A 2.6-to-4.1GHz Fractional-N Digital PLL Based on a Time-Mode Arithmetic Unit Achieving -249.4dB FoM and -59dBc Fractional Spurs
    Gao, Zhong; He, Jingchu; Fritz, Martin; Gong, Jiang; Shen, Yiyu; Zong, Zhirui; Chen, Peng; Spalink, Gerd; Eitel, Ben; Yamamoto, Ken; Staszewski, Robert Bogdan; Alavi, Morteza S.; Babaie, Masoud;
    In 2022 IEEE International Solid- State Circuits Conference (ISSCC),
    pp. 380-382, 2022. DOI: 10.1109/ISSCC42614.2022.9731561

  14. A Wideband Four-Way Doherty Bits-In RF-Out CMOS Transmitter
    Beikmirza, Mohammadreza; Shen, Yiyu; de Vreede, Leo C. N.; Alavi, Morteza S.;
    IEEE Journal of Solid-State Circuits,
    Volume 56, Issue 12, pp. 3768-3783, 2021. DOI: 10.1109/JSSC.2021.3105542
    Keywords: ... Clocks;OFDM;Logic gates;Wideband;Constellation diagram;Baseband;Timing;50%-LO clock distribution;8-shape inductor/balun;current-mode class-D (CMCD);efficiency enhancement;in-phase/quadrature (I/Q) interleaving;radio frequency digital-to-analog converter (RF-DAC);sign-bit.

  15. 6.2 A 4-Way Doherty Digital Transmitter Featuring 50%-LO Signed IQ Interleave Upconversion with more than 27dBm Peak Power and 40% Drain Efficiency at 10dB Power Back-Off Operating in the 5GHz Band
    Beikmirza, Mohammadreza; Shen, Yiyu; Mehrpoo, Mohammadreza; Hashemi, Mohsen; Mul, Dieuwert; de Vreede, Leo C.N.; Alavi, Morteza S.;
    In 2021 IEEE International Solid-State Circuits Conference (ISSCC),
    pp. 92-94, 2021. DOI: 10.1109/ISSCC42613.2021.9365831
    Keywords: ... Wireless communication;Transmitters;Peak to average power ratio;Nanoscale devices;Solid state circuits;Wideband;Standards.

  16. Efficiency and Linearity of Digital "Class-C Like" Transmitters
    Mul, Dieuwert P.N.; Bootsman, Rob J.; Bruinsma, Quinten; Shen, Yiyu; Krause, Sebastian; Quay, Rüdiger; Pelk, Marco J.; van Rijs, Fred; Heeres, Rob M.; Pires, Sergio; Alavi, Morteza; de Vreede, Leo C.N.;
    In 2020 50th European Microwave Conference (EuMC),
    pp. 1-4, 2021. DOI: 10.23919/EuMC48046.2021.9338122
    Keywords: ... Transmitters;Impedance matching;Power amplifiers;Linearity;Energy efficiency;Power generation;Next generation networking;Class-C;digital transmitter;efficiency;linearity;LDMOS;CMOS RFIC;polar transmitter;RFDAC;digital power amplifier.

  17. A 30GHz 4-way Series Doherty Digital Polar Transmitter Achieving 18% Drain Efficiency and -27.6dB EVM while Transmitting 300MHz 64-QAM OFDM Signal
    Mortazavi, Mohsen; Shen, Yiyu; Mul, Dieuwert. P. N.; de Vreede, Leo C. N.; Spirito, Marco; Babaie, Masoud;
    In 2021 IEEE Custom Integrated Circuits Conference (CICC),
    pp. 1-2, 2021. DOI: 10.1109/CICC51472.2021.9431396
    Keywords: ... Application specific integrated circuits;Transmitters;Power combiners;Communication systems;Scalability;Conferences;Modulation.

  18. An 18.5 W Fully-Digital Transmitter with 60.4 % Peak System Efficiency
    Bootsman, R.J.; Mul, D.P.N.; Shen, Y.; Heeres, R.M.; van Rijs, F.; Alavi, M.S.; de Vreede, L.C.N.;
    In 2020 IEEE/MTT-S International Microwave Symposium (IMS),
    pp. 1113-1116, 2020. DOI: 10.1109/IMS30576.2020.9223942
    Keywords: ... Radio frequency;Microwave measurement;Thermometers;Power measurement;Transmitters;Power amplifiers;Prototypes;Digital transmitter;CMOS RFIC;LDMOS;polar transmitter;digital pre-distortion (DPD);power RFDAC;digital power amplifier.

  19. A 1–3 GHz I/Q Interleaved Direct-Digital RF Modulator As A Driver for A Common-Gate PA in 40 nm CMOS
    Shen, Yiyu; Bootsman, Rob; Alavi, Morteza S.; de Vreede, Leo C.N.;
    In 2020 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 287-290, 2020. DOI: 10.1109/RFIC49505.2020.9218324
    Keywords: ... Harmonic analysis;IP networks;Radio frequency;Clocks;Modulation;Computer architecture;Microprocessors;DDRM;PA driver;RF-DAC;CG PA;IQ-Interleaving;harmonic rejection;dynamic biasing;DPD-free.

  20. A 0.5-3 GHz I/Q Interleaved Direct-Digital RF Modulator with up to 320 MHz Modulation Bandwidth in 40 nm CMOS
    Shen, Yiyu; Bootsman, Rob; Alavi, Morteza S.; de Vreede, Leonardus;
    In 2020 IEEE Custom Integrated Circuits Conference (CICC),
    pp. 1-4, 2020. DOI: 10.1109/CICC48029.2020.9075949
    Keywords: ... Modulation;Bandwidth;Radio frequency;Computer architecture;Clocks;Distortion;Power generation;DDRM;RFDAC;quadrature up-converter;IQ-Mapping;Digital-Intensive Transmitter;DPD-free.

  21. A Highly Linear Wideband Polar Class-E CMOS Digital Doherty Power Amplifier
    Hashemi, Mohsen; Zhou, Lei; Shen, Yiyu; de Vreede, Leo C. N.;
    IEEE Transactions on Microwave Theory and Techniques,
    Volume 67, Issue 10, pp. 4232-4245, 2019. DOI: 10.1109/TMTT.2019.2933204
    Keywords: ... Wideband;Impedance;Radio frequency;Inverters;Baluns;Power generation;CMOS;digital power amplifier (DPA);digital predistortion (DPD);Doherty PA;efficient;linear;multiphase RF-clocking;nonlinear sizing;overdrive-voltage control;wideband.

  22. A Wideband Linear $I/Q$ -Interleaving DDRM
    Mehrpoo, Mohammadreza; Hashemi, Mohsen; Shen, Yiyu; de Vreede, Leo C. N.; Alavi, Morteza S.;
    IEEE Journal of Solid-State Circuits,
    Volume 53, Issue 5, pp. 1361-1373, 2018. DOI: 10.1109/JSSC.2017.2786685
    Keywords: ... Radio frequency;Linearity;Modulation;Switches;Wideband;Transient analysis;Carrier aggregation (CA);counter-intermodulation (C-IM);direct-digital RF modulator (DDRM);harmonic rejection (HR);IQ-interleaving;RF digital-to-analog converter (DAC);second-order hold (SOH).

  23. A Wideband I/Q RFDAC-Based Phase Modulator
    Yiyu Shen; Michael Polushkin; Mohammad Reza Mehrpoo; Mohsen Hashemi; Earl McCune; Morteza S. Alavi; Leo C. N. de Vreede,;
    In (accepted RWS 2018).,
    2018.

  24. A wideband I/Q RFD AC-based phase modulator
    Shen, Yiyu; Polushkin, Michael; Mehrpoo, Mohammadreza; Hashemi, Mohsen; McCune, Earl; Alavi, Morteza S.; de Vreede, Leo C. N.;
    In 2018 IEEE 18th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF),
    pp. 8-11, 2018. DOI: 10.1109/SIRF.2018.8304215
    Keywords: ... Phase modulation;Power harmonic filters;Frequency modulation;Harmonic analysis;Wideband;Band-pass filters;Phase measurement;Phase modulator;RFDAC;wideband;frequency-agile;harmonic rejection.

  25. An Intrinsically Linear Wideband Polar Digital Power Amplifier
    Hashemi, Mohsen; Shen, Yiyu; Mehrpoo, Mohammadreza; Alavi, Morteza S.; de Vreede, Leo C. N.;
    IEEE Journal of Solid-State Circuits,
    Volume 52, Issue 12, pp. 3312-3328, 2017. DOI: 10.1109/JSSC.2017.2737647
    Keywords: ... Harmonic analysis;Power amplifiers;Linearity;Power generation;Transistors;Switches;Integrated circuit modeling;Class-E/F2;digital power amplifier (DPA);digital pre-distortion (DPD)-less;efficient;linear;multiphase RF clocking;nonlinear sizing;overdrive-voltage control;wideband.

  26. 17.5 An intrinsically linear wideband digital polar PA featuring AM-AM and AM-PM corrections through nonlinear sizing, overdrive-voltage control, and multiphase RF clocking
    Hashemi, Mohsen; Shen, Yiyu; Mehrpoo, Mohammadreza; Acar, Mustafa; van Leuken, René; Alavi, Morteza S.; de Vreede, Leonardus;
    In 2017 IEEE International Solid-State Circuits Conference (ISSCC),
    pp. 300-301, 2017. DOI: 10.1109/ISSCC.2017.7870380
    Keywords: ... Radio frequency;Clocks;Power amplifiers;Linearity;Tuning;Delays;Wideband.

  27. A wideband linear direct digital RF modulator using harmonic rejection and I/Q-interleaving RF DACs
    Mehrpoo, M.; Hashemi, M.; Shen, Y.; van Leuken, R.; Alavi, M. S.; de Vreede, L. C. N.;
    In 2017 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 188-191, 2017. DOI: 10.1109/RFIC.2017.7969049
    Keywords: ... Radio frequency;Harmonic analysis;Modulation;Baseband;Wideband;Linearity;Clocks;RF DAC;direct digital RF modulator;harmonic rejection;2nd-order-hold;carrier aggregation;LTE.

  28. Highly efficient and linear class-E CMOS digital power amplifier using a compensated Marchand balun and circuit-level linearization achieving 67% peak DE and −40dBc ACLR without DPD
    Hashemi, Mohsen; Zhou, Lei; Shen, Yiyu; Mehrpoo, Mohammadreza; de Vreede, Leo;
    In 2017 IEEE MTT-S International Microwave Symposium (IMS),
    pp. 2025-2028, 2017. DOI: 10.1109/MWSYM.2017.8059066
    Keywords: ... Radio frequency;Wideband;Switches;System-on-chip;Clocks;Harmonic analysis;Class-E;CMOS;digital PA;DPD-less;efficient;linear;wideband.

  29. A fully-integrated digital-intensive polar Doherty transmitter
    Shen, Yiyu; Mehrpoo, Mohammadreza; Hashemi, Mohsen; Polushkin, Michael; Zhou, Lei; Acar, Mustafa; van Leuken, Rene; Alavi, Morteza S.; de Vreede, Leo;
    In 2017 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 196-199, 2017. DOI: 10.1109/RFIC.2017.7969051
    Keywords: ... Phase modulation;System-on-chip;Baseband;Transmitters;Topology;Clocks;Power generation;Doherty transmitter;digital-intensive polar;efficiency enhancement;DPD;phase modulator;on-chip combiner.

BibTeX support

Last updated: 7 Dec 2021

Yiyu Shen

Alumnus
  • Left in 2021