The great pleasure in life is doing what people say you cannot do

• B.Eng., M.Phil. and Ph.D., Electrical and Electronic Engineering, The Hong Kong University of Science and Technology (HKUST)
• Associate Professor, Department of Electronic Engineering, The Chinese University of Hong Kong (CUHK)
• Senior Member, IEEE
• Chairman of IEEE (Hong Kong) Electron Device/Solid-State Circuit Joint Chapter, 2012
• Member of Conference Organization Committees: IEEE EDSSC 2006, 2008, 2010 and 2013, IEEE DELTA 2008, and IEEE VLSI SoC 2011
• Member of Technical Program Committee, Student Symposium on Electron Devices and Solid-State Circuits, 2020
• Member of Editorial Board of Energies: Electrical Power and Energy System
• Member of Editorial Board of Active and Passive Electronic Components, Hindawi Publishing Corporation
• Guest Editor, Special Issue "Advances in Power-Management Integrated Circuits", Energies
• Paper Reviewer of IEEE Journals: JSSC, OJCAS, TCAS-I, TCAS-II, TPE, TIE, TVLSI, TBCAS, TCAD, TED, Sensors Journal and Access
• External Examiner of Thesis Committees: CityU, HKUST, HKU and NTU (Singapore)
• Recipient of the Young Scientist Award of the Hong Kong Institution of Science, 2003
• Recipient of the Departmental Exemplary Teaching Awards, CUHK, 2006-2007, 2009-2010, 2010-2011, 2011-2012 and 2015-2016
• Recipient of the Faculty Exemplary Teaching Awards, CUHK, 2007 and 2016
• Co-recipient of the Best Paper Awards in IEEE Student Symposium ED/SSC in 2011 and 2014
• Co-recipient of the Best Paper Award in 2015, IEEE TENCON
• Co-recipient of the Best Paper Award in 2019, IEEE EDSSC
• Co-recipient of Silkroad Award in 2024, IEEE ISSCC

• Email: knleung@ee.cuhk.edu.hk
• Tel: (852) 3943-8457 (Office)
• Fax: (852) 2603-5558

• ELEG3202 Analog Integrated Circuits
• ELEG4215 Power Converter Circuits
• ELEG5726 Power-Management Technology

• Enrichment of Electronic Technology Learning Through Engineering Designs

• Power-Management Integrated Circuits
• Wireless Power Transfer
• Ultra-Low-Power Analog Integrated Circuits

• Current: 7 Ph.D Students
• Graduated: 8 Ph.D Students, 10 M.Phil. Students and 26 M.Sc. Students

• Published 80 Journal Articles and 71 International Conference Papers
• Web of Science
• Google Scholar Profile

1. Power Management for System-On-a-Chip Design in Nano-Scale Technology (RGC)
2. A Power-Supply IC for WiMAX Transmitter (RGC)
3. Transient-Enhanced Low-Dropout Regulators with Voltage-Spike Detector Based on Capacitive Coupling (RGC)
4. Digital-Control SIMO DC-DC Converter with Enhanced Output Power of Individual Sub-Converter (RGC)
5. Development of Fast Transient Low-Dropout Regulator Based on Dominant-Pole Tracking and Cancellation (RGC)
6. Low-dropout Regulators with Multiple Pole-Zero Cancellations (RGC)
7. Dual-Inductor Multiple-Output Buck-Boost DC-DC Converters with Enhanced Attenuation of Self- and Cross-regulations (RGC)
8. Develop a Configurable RF Interface Module of UHF RFID Tag for Different Technology Nodes (ITF)
9. Study the Design Challenges of 90nm Technology UHF RFID Tag IC (ITF)
10. Power-Management Circuit for Passive UHF RFID Tag (ITF)
11. High-Efficiency SIMO Power Converter for SoC (ITF)
12. Development of Buck-Boost DC-DC Converter for USB Power Delivery 3.1 (ITF)
13. Automated and Continuous Monitoring of Polycyclic Aromatic Hydrocarbon in Air Pollutants (ITF)
14. Development of Capacitor-Free Three-Stage Amplifier Structure (Direct Grant)
15. A Capacitor-less Low-Dropout Regulator with Supply Close to Threshold Voltage (Direct Grant)
16. A Capacitor-less Low-Dropout Regulator with Digital-Assisted Transient Enhancer (Direct Grant)

1. Frequency Compensation Techniques for Low-Power Multistage Amplifiers. U.S. Patent 6,208,206, Mar. 27, 2001, licensed.
2. CMOS Voltage Reference. U.S. Patent 6,441,680, Aug. 27, 2002, licensed.
3. Low Dropout Regulator Capable of On-Chip Implementation. U.S. Patent 7,205,827, Apr. 17, 2007, licensed.
4. Single-Transistor-Control Low-Dropout Regulator. U.S. Patent 7,285,942, Oct. 23, 2007, licensed.
5. Area-Efficient Capacitor-Free CMOS Low-Dropout Regulator. U.S. Patent 7,495,422, Feb. 24, 2009, licensed.
6. End-Point Prediction Scheme for Voltage Regulators. U.S. Patent 7,619,395, Nov. 17, 2009, licensed.
7. Low Dropout Regulator Capable of On-Chip Implementation. U.S. Patent RE42,116, Feb. 8, 2011.
8. Single-Transistor-Control Low-Dropout Regulator. U.S. Patent RE42,335, May 10, 2011.

1. K. N. Leung, P. K. T. Mok, W. H. Ki and J. K. O. Sin, "Three-Stage Large Capacitive Load Amplifier with Damping-Factor-Control Frequency Compensation," IEEE Journal of Solid-State Circuits, Vol. 35, No. 2, pp. 221-230, Feb. 2000.
2. K. N. Leung and P. K. T. Mok, "Nested Miller Compensation in Low-Power CMOS Design," IEEE Transactions on Circuits and Systems II, Vol. 48, No. 4, pp. 388-394, Apr. 2001.
3. K. N. Leung and P. K. T. Mok, "Analysis of Multi-Stage Amplifier - Frequency Compensation," IEEE Transactions on Circuits and Systems I, Vol. 48, No. 9, pp. 1041-1056, Sept. 2001.
4. K. N. Leung and P. K. T. Mok, "A Sub-1-V 15-ppm/^oC CMOS Bandgap Voltage Reference without Requiring Low Threshold Voltage Device," IEEE Journal of Solid-State Circuits, Vol. 37, No. 4, pp. 526-530, Apr. 2002.
5. K. N. Leung and P. K. T. Mok, "A CMOS Voltage Reference Based on Weighted ΔV_GS for CMOS Low-Dropout Linear Regulators," IEEE Journal of Solid-State Circuits, Vol. 38, No. 1, pp. 146-150, Jan. 2003.
6. K. N. Leung, P. K. T. Mok and C. Y. Leung, "A 2-V 23-µA 5.3-ppm/^oC Curvature-Compensated CMOS Bandgap Reference," IEEE Journal of Solid-State Circuits, Vol. 38, No. 3, pp. 561-564, Mar. 2003.
7. K. N. Leung and P. K. T. Mok, "A Capacitor-Free CMOS Low-Dropout Regulator with Damping-Factor-Control Frequency Compensation," IEEE Journal of Solid-State Circuits, Vol. 38, No. 10, pp. 1691-1702, Oct. 2003.
8. H. Lee, K. N. Leung and P. K. T. Mok, "A Dual-Path Bandwidth Extension Amplifier Topology with Dual-Loop Parallel Compensation," IEEE Journal of Solid-State Circuits, Vol. 38, No. 10, pp. 1739-1744, Oct. 2003.
9. C. Y. Leung, P. K. T. Mok, K. N. Leung and M. Chan, "An Integrated CMOS Current-Sensing Circuit for Low-Voltage Current-Mode Buck Regulator," IEEE Transactions on Circuits and Systems II, Vol. 52, No. 7, pp. 394-397, Jul. 2005.
10. H. Lee, P. K. T. Mok and K. N. Leung, "Design of Low-Power Analog Drivers Based on Slew-Rate Enhancement Circuits for CMOS Low-Dropout Regulators," IEEE Transactions on Circuits and Systems II, Vol. 52, No. 9, pp. 563-567, Sept. 2005.
11. C. Y. Leung, P. K. T. Mok and K. N. Leung, "A 1-V Integrated Current-Mode Boost Converter in Standard 3.3/5-V CMOS Technologies," IEEE Journal of Solid-State Circuits, Vol. 40, No. 11, pp. 2265-2274, Nov. 2005.
12. M. Siu, P. K. T. Mok, K. N. Leung, Y. H. Lam and W. H. Ki, "A Voltage-Mode PWM Buck Converter with End-Point Prediction," IEEE Transactions on Circuits and Systems II, Vol. 53, No. 4, pp. 294-298, Apr. 2006.
13. S. K. Lau, P. K. T. Mok and K. N. Leung, "A Low-Dropout Regulator for SoC with Q-Reduction," IEEE Journal of Solid-State Circuits, Vol. 42, No. 3, pp. 658-664, Mar. 2007.
14. T. Y. Man, K. N. Leung, C. Y. Leung, P. K. T. Mok and M. Chan, "Development of Single-Transistor-Control LDO Based on Flipped Voltage Follower for SoC," IEEE Transactions on Circuits and Systems I, Vol. 55, No. 5, pp. 1392-1401, Jun. 2008.
15. S. K. Tang, K. P. Pun, C. S. Choy, C. F. Chan and K. N. Leung, "A Fully Differential Band-Selective Low Noise Amplifier for MB-OFDM UWB Receivers," IEEE Transactions on Circuits and Systems II, Vol. 55, No. 7, pp. 653-657, Jul. 2008.
16. A. K. Y. Wong, K. P. Pun, Y. T. Zhang and K. N. Leung, "A Low-Power CMOS Front-End for Photoplethysmographic Signal Acquisition with Robust DC Photocurrent Rejection," IEEE Transactions on Biomedical Circuits and Systems, Vol. 2, No. 4, pp. 280-288, Dec. 2008.
17. P. Y. Or and K. N. Leung, "An Output-Capacitorless Low-Dropout Regulator with Direct Voltage-Spike Detection," IEEE Journal of Solid-State Circuits, Vol. 45, No. 2, pp. 458-466, Feb. 2010.
18. C. F. Chan, K. P. Pun, K. N. Leung, J. P. Guo, L. L. K. Leung and C. S. Choy, "Low-Power Continuously-Calibrated Clock Recovery Circuit for UHF RFID EPC Class-1 Generation-2 Transponders," IEEE Journal of Solid-State Circuits, Vol. 45, No. 3, pp. 587-599, Mar. 2010.
19. A. K. Y. Wong, K. N. Leung, K. P. Pun and Y. T. Zhang, "A 0.5 Hz Highpass-Cutoff Dual-Loop Transimpedance Amplifier for Wearable NIR Sensing Device," IEEE Transactions on Circuits and Systems II, Vol. 57, No. 7, pp. 531-535, Jul. 2010.
20. J. P. Guo and K. N. Leung, "A 6-µW Chip-Area-Efficient Output-Capacitorless LDO in 90-nm CMOS Technology," IEEE Journal of Solid-State Circuits, Vol. 45, No. 9, pp. 1896-1905, Sept. 2010.
21. K. N. Leung and Y. S. Ng, "A CMOS Low Dropout Regulator with a Momentarily Current-Boosting Voltage Buffer," IEEE Transactions on Circuits and Systems I, Vol. 57, No. 9, pp. 2312-2319, Sept. 2010.
22. P. Y. Or and K. N. Leung, "A Fast-Transient Low-Dropout Regulator with Load-Tracking Impedance Reduction and Loop-Gain Boosting," IEEE Transactions on Circuits and Systems II, Vol. 57, No. 10, pp. 757-761, Oct. 2010.
23. M. Ho, K. N. Leung and K.-L. Mak, "A Low-Power Fast-Transient 90-nm Low-Dropout Regulator with Multiple Small-Gain Stages," IEEE Journal of Solid-State Circuits, Vol. 45, No. 11, pp. 2466-2475, Nov. 2010.
24. K. N. Leung, Y. Y. Mai and P. K. T. Mok, "A Chip-Area Efficient Voltage Regulator for VLSI Systems," IEEE Transactions on VLSI Systems, Vol. 18, No. 12, pp. 1757-1762, Dec. 2010.
25. M. Ho and K. N. Leung, "Dynamic Bias-Current Boosting Technique for Ultra-Low-Power Low-Dropout Regulator in Biomedical Applications," IEEE Transactions on Circuits and Systems II, Vol. 58, No. 3, pp. 174-178, Mar. 2011.
26. J. B. Jia and K. N. Leung, "A Digital-Control Single-Inductor Triple-Output DC-DC Converter with Pre-Sub-Period Inductor-Current Control," IEEE Transactions on Power Electronics, Vol. 27, No. 4, pp. 2028-2042, Apr. 2012.
27. Y. Q. Zheng, H. Chen and K. N. Leung, "A Fast-Response Pseudo-PWM Buck Converter with PLL-Based Hysteresis Control," IEEE Transactions on VLSI Systems, Vol. 20, No. 7, pp. 1167-1174, Jul. 2012.
28. K. W. Li, K. N. Leung and L. L. K. Leung, "Sub-mW LC Dual-Input Injection-Locked Oscillator for Autonomous WBSNs," IEEE Transactions on VLSI Systems, Vol. 21, No. 3, pp. 546-553, Mar. 2013.
29. T. W. Mui, M. Ho, K. H. Mak, J. P. Guo, H. Chen and K. N. Leung, "An Area-Efficient 96.5%-Peak-Efficiency Cross-Coupled Voltage Doubler with Minimum Supply of 0.8V," IEEE Transactions on Circuits and Systems II, Vol. 61, No. 9, pp. 656-660, Sep. 2014.
30. K. H. Mak and K. N. Leung, "A Signal- and Transient-Current Boosting Amplifier for Large Capacitive Load Applications," IEEE Transactions on Circuits and Systems I, Vol. 61, No. 10, pp. 2777-2785, Oct. 2014.
31. K. H. Mak, M. W. Lau, J. P. Guo, T. W. Mui, M. Ho, W. L. Goh and K. N. Leung, "A 0.7-V 24-µA Hybrid OTA Driving 15-nF Capacitive Load with 1.46-MHz GBW," IEEE Journal of Solid-State Circuits, Vol. 50, No. 11, pp. 2750-2757, Nov. 2015.
32. H. Wang, X. Tang, C. S. Choy, K. N. Leung and K. P. Pun, "A 5.4-mW 180-cm Transmission Distance 2.5-Mbps Advanced Techniques Based Novel Intra-Body Communication Receiver Analog Front End," IEEE Transactions on VLSI Systems, Vol. 23, No. 12, pp. 2829-2841, Dec. 2015.
33. Y. Q. Zheng, M. Ho, J. P. Guo, K.-L. Mak and K. N. Leung, "A Single-Inductor Multiple-Output Auto-Buck-Boost DC-DC Converter with Auto Phase Allocation," IEEE Transactions on Power Electronics, Vol. 31, No. 3, pp. 2296-2313, Mar. 2016.
34. M. Ho, J. P. Guo, T. W. Mui, K. H. Mak, W. L. Goh, H. C. Poon, S. Bu, M. W. Lau and K. N. Leung, "A Two-Stage Large-Capacitive-Load Amplifier with Multiple Cross-Coupled Small-Gain Stages," IEEE Transactions on VLSI Systems, Vol. 24, No. 7, pp. 2580-2592, Jul. 2016.
35. M. Ho, J. P. Guo, K. H. Mak, W. L. Goh, S. Bu, Y. Q. Zheng, X. Tang and K. N. Leung, "A CMOS Low-Dropout Regulator with Dominant-Pole Substitution," IEEE Transactions on Power Electronics, Vol. 31, No. 9, pp. 6362-6371, Sep. 2016.
36. Y. Q. Zheng, M. Ho, J. P. Guo and K. N. Leung, "A Single-Inductor Multiple-Output Auto-Buck-Boost DC-DC Converter with Tail Current Control," IEEE Transactions on Power Electronics, Vol. 31, No. 11, pp. 7857-7875, Nov. 2016.
37. S. Bu, J. P. Guo and K. N. Leung, "A 200-ps-Response-Time Output-Capacitorless Low-Dropout Regulator with Unity-Gain Bandwidth >100 MHz in 130-nm CMOS," IEEE Transactions on Power Electronics, Vol. 33, No. 4, pp. 3232-3246, Apr. 2018.
38. S. Bu, K. N. Leung, Y. Lu, J. P. Guo and Y. Q. Zheng, "A Fully Integrated Low-Dropout Regulator with Differentiator-Based Active Zero Compensation," IEEE Transactions on Circuits and Systems I, Vol. 65, No. 10, pp. 3578-3591, Oct. 2018.
39. C. H. Hung, Y. Q. Zheng, J. P. Guo and K. N. Leung, "Bandwidth and Slew Rate Enhanced OTA with Sustainable Dynamic Bias," IEEE Transactions on Circuits and Systems II, Vol. 67, No. 4, pp. 635-639, Apr. 2020.
40. X. Ding, P. K. Chan and K. N. Leung, "A 40nm CMOS Hysteretic Buck DC-DC Converter with Digital-Controlled Power-Driving-Tracked-Duration Current Pump," IEEE Access, Vol. 8, pp. 177374-177384, Sep. 2020.
41. Y. Q. Zheng, J. P. Guo and K. N. Leung, "A Single-Inductor Multiple-Output Buck/Boost DC-DC Converter with Duty-Cycle and Control-Current Predictor," IEEE Transactions on Power Electronics, Vol. 35, No. 11, pp. 12022-12039, Nov. 2020.
42. Y. H. Woo, J. X. Yang, J. P. Guo, Y. Q. Zheng and K. N. Leung, "A Hybrid Low-Dropout Regulator with Load Regulation Correction," IEEE Access, Vol. 10, pp. 25106-25113, 2022.
43. Y. H. Woo, J. X. Yang, J. W. Li, J. P. Guo, Y. Q. Zheng and K. N. Leung, "An Analog-Assisted Digital LDO With Dynamic-Biasing Asynchronous Comparator," IEEE Access, Vol. 10, pp. 56996-57002, 2022.
44. Y. Zhou, Q. Q. Cheng, J. W. Li, Y. Q. Zheng and K. N. Leung, "Full-Wave Sense-FET-Based Inductor-Current Sensor with Wide Dynamic Range for Buck Converters," IEEE Transactions on Circuits and Systems II, Vol. 69, No. 4, pp. 2041-2045, Apr. 2022.
45. J. X. Yang, B. Li, K. N. Leung, Z. J. Chen and Y. Q. Zheng, “A Triple-Mode DC-DC Converter with Wide Input and Load Ranges for Energy Harvesting in IoT Edge Nodes,” IEEE Transactions on Circuits and Systems II, Vol. 69, No. 12, pp. 4694-4698, Dec. 2022.
46. Y. Zhou, J. W. Li, X. Liu, Y. Q. Zheng and K. N. Leung, “Bidirectional Buck-Boost Converter with Reduced Power Loss and No Right-Half-Plane Zero,” IEEE Transactions on Power Electronics, Vol. 38, No. 2, pp. 2127-2042, Feb. 2023.
47. C. Gao, S. He, P. Davari, K. N. Leung, P. C. Loh and F. Balaabjerg, "Passivity-Based Design of Resonant Current Controllers without Involving Partial Derivative," IEEE Transactions on Power Electronics, Vol. 38, No. 12, pp. 15102-15108, Dec. 2023.
48. C. Gao, S. He, B. Cui, B. Zhang, K. N. Leung and P. C. Loh, "Quantization Effects on Digital-PR-Controlled Active Power Filter," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 11, No. 6, pp. 5785-5797, Dec. 2023.
49. Y. Zhou, H. T. Wang, Y. L. Xiong, X. Liu, Y. Q. Zheng, K. P. Pun and K. N. Leung, "A Direct 24V-to-1V Multi-Level Multi-Phase Hybrid Buck Converter with Automatic V_CF Balancing and Current Sharing Mechanism," IEEE Journal of Emerging and Selected Topics in Power Electronics, Vol. 11, No. 6, pp. 5954-5968, Dec. 2023.
50. Y. J. Lin, X. Liu and K. N. Leung, "A Bandwidth-Boosted Hybrid LDO with Spike-To-Time Converter for Near-Threshold Regulation," IEEE Transactions on Power Electronics, Vol. 39, No. 3, pp. 3452-3463, Mar. 2024.
51. J. Y. Ruan, J. M. Jiang, C. Z. Ding, Y. X. Li, Y. H. Wu, K. N. Leung and X. Liu, "A 2.8 µs Response Time 95.1% Efficiency Hybrid Boost Converter with RHP Zero Elimination for Fast-Transient Applications," IEEE Journal of Solid-State Circuits, accepted.
52. J. M. Li, X. Liu and K. N. Leung, “A 24-to-240W 95.6%-Efficiency <300-µs-Settling-Time Hybrid MCR/PT Wireless Power Transfer System,” IEEE Transactions on Power Electronics, accepted.

1. K. N. Leung, P. K. T. Mok, W. H. Ki and J. K. O. Sin, "Damping-Factor-Control Frequency Compensation Technique for Low-Voltage Low-Power Large Capacitive Load Applications," IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, California, USA, pp. 158-159, Feb. 1999.
2. K. N. Leung and P. K. T. Mok, "A CMOS Voltage Reference Based on Weighted Difference of Gate-Source Voltages between PMOS and NMOS Transistors for Low Dropout Regulator," The 27th European Solid-State Circuits Conference (ESSCIRC), Villach, Austria, pp. 88-91, Sept. 2001.
3. K. N. Leung, P. K. T. Mok and C. Y. Leung, "A 2-V 23-µA 5.3-ppm/^oC 4th-Order Curvature-Compensated CMOS Bandgap Reference," IEEE Custom Integrated Circuits Conference (CICC), Orlando, Florida, USA, pp. 457-460, May 2002.
4. P. K. T. Mok and K. N. Leung, "Design Considerations of Recent Advanced Low-Voltage Low-Temperature-Coefficient CMOS Bandgap Voltage Reference," IEEE Custom Integrated Circuits Conference (CICC), Orlando, Florida, USA, pp. 635-642, Oct. 2004.
5. J. P. Guo and K. N. Leung, "A 25mA CMOS LDO with −85dB PSRR at 2.5MHz," IEEE Asian Solid-State Circuits Conference (ASSCC), Singapore, pp. 381-384, Nov. 2013.
6. J. Ruan, J. M. Jiang, C. Z. Ding, K. Yuan, K. N. Leung and X. Liu, "A Li-ion-Battery-Input 1-6-V Output Bootstrap-Free Hybrid Buck-or-Boost Converter without RHP Zero Achieving 97.3% Peak Efficiency 6μs Recovery Time and 1.13µs/V DVS Rate," IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, California, USA, pp. 148-149, Feb. 2024.