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Electrical and Computer Engineering

Power Group


Queen's Power Group Publications - 2008 & Before

All | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 & Before

Journal Papers Conference Papers Patents

Journal Papers

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[J28] Z. Zhang, W. Eberle, P. Lin, Y.F. Liu, P.C. Sen, "A 1-MHz High-Efficiency 12-V Buck Voltage Regulator With a New Current-Source Gate Driver", IEEE Transactions on Power Electronics, Vol. 23, No. 6, Nov. 2008, pp. 2817-2827.

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[J27] S. Ye, E. Meyer and Y.F. Liu, "A Novel Two Phase Nonisolated Full Bridge With Shared Primary Switches", IEEE Transactions on Power Electronics, Vol. 23, No. 5, Sept. 2008, pp. 2363-2376.

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[J26] E. Meyer, Z. Zhang and Y.F. Liu, "An Optimal Control Method for Buck Converters Using a Practical Capacitor Charge Balance Technique", IEEE Transactions on Power Electronics, Vol. 23, No. 4, July 2008, pp. 1802-1812.

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[J25] W. Eberle, P.C. Sen and Y.F. Liu, "A New Resonant Gate Drive Circuit with Efficient Energy Recovery and Low Conduction Loss", IEEE Transactions on Industrial Electronics, Vol. 55, No. 5, May 2008, pp. 2213-2221.

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[J24] Z. Yang, S. Ye, and Y.F. Liu, "A New Dual Channel Resonant Gate Drive Circuit for Low Gate Drive Loss and Low Switching Loss", IEEE Transactions on Power Electronics, Vol. 23, No. 3, May 2008, pp. 1574-1583.

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[J23] A. Elnady, A. Noureldin and Y.F. Liu, "Power-Quality Improvement Using Wiener Filters Based On a Modular Compensating Strategy", IEEE Transactions on Power Delivery, Vol. 23, No. 2, April 2008, pp. 841-849.

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[J22] W. Eberle, Z. Zhang, Y.F. Liu and P.C. Sen, "A Current Source Gate Driver Achieving Switching Loss Savings and Gate Energy Recovery at 1-MHz," IEEE Transactions on Power Electronics, Vol. 23, No. 2, Mar. 2008, pp. 678-691.

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[J21] Z. Zhang, W. Eberle, Y.F. Liu and P.C. Sen, "Optimal Design of a Resonant Gate Driver for Buck Converter Based on a New Analytical Loss Model," IEEE Transactions on Power Electronics, Vol. 23, No. 2, Mar. 2008, pp. 653-666.

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[J20] Y. Han and Y.F. Liu, "A Practical Transformer Core Loss Measurement Scheme for High-Frequency Power Converter", IEEE Transactions on Industrial Electronics, Vol. 55, No. 2, Feb. 2008, pp. 941-948.

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[J19] S. Ye, W. Eberle and Y.F. Liu, "A Novel Non-Isolated Full Bridge Topology for VRM Applications", IEEE Transactions on Power Electronics, Vol. 23, No. 1, Jan. 2008, pp. 427-437.

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[J18] A. Perry, G. Feng, Y.F. Liu and P.C. Sen, "A Design Method for PI-Like Fuzzy Logic controllers for DC-DC Converter", IEEE Transactions on Industrial Electronics, Vol. 54, No. 5, Oct. 2007, pp. 2688-2696.

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[J17] Y. Han, W. Eberle and Y.F. Liu, "A Practical Copper Loss Measurement Method for the Planar Transformer in High-Frequency Switching Converters", IEEE Transactions on Industrial Electronics, Vol. 54, No. 4, August 2007, pp. 2276-2287.

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[J16] G. Feng, E. Meyer, and Y.F. Liu, "A New Digital Control Algorithm to Achieve Optimal Dynamic Performance in DC-to-DC Converters", IEEE Transactions on Power Electronics, July 2007, Volume 22, Number 4, pp. 1489-1498.

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[J15] Z. Yang, S. Ye, and Y.F. Liu, "A New Resonant Gate Drive Circuit for Synchronous Buck Converter", IEEE Transactions on Power Electronics, July 2007, Volume 22, Number 4, pp. 1311-1320.

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[J14] W. Zhang, Y.F. Liu, and B. Wu, "A New Duty Cycle Control Strategy for Power Factor Correction and FPGA Implementation", IEEE Transactions on Power Electronics, Nov 2006, Volume 21, Number 6, pp. 1745-1753.

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[J13] W. Zhang, Y.F. Liu, and B. Wu, "New Digital Control Method for Power Factor Correction", IEEE Transactions on Industrial Electronics, June 2006, Volume 53, Number 3, pp. 987-990.

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[J12] W. Zhang, G. Feng, Y.F. Liu, and B. Wu, "A Digital Power Factor Correction (PFC) Control Strategy Optimized for DSP", IEEE Transactions on Power Electronics, Nov 2004, Volume 19, Number 6, pp. 1474-1486.

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[J11] G. Feng, Y.F. Liu and L. Huang, "A New Robust Algorithm to Improve the Dynamic Performance on the Speed Control of Induction Motor Drive", IEEE Transactions on Power Electronics, November 2004, Vol.19, No.6, pp. 1614-1627

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[J10] S. Ye, W. Eberle and Y.F. Liu, "A Novel EMI Filter Design Method for Switching Power Supplies", IEEE Transactions on Power Electronics, Nov 2004, Volume 19, No. 6, pp. 1668-1678

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[J9] Y. Xi, P. Jain, Y.F. Liu and R. Orr, "A Self Core Reset and Zero Voltage Switching Forward Converter Topology", IEEE Transactions on Power Electronics, Vol.15, No.6, November 2000, pp. 1192-1203

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[J8] G. Moschopoulos, P. Jain, Y.F. Liu and G. Joos, "A Zero-Voltage Switched PWM Boost Converter with an Energy Feedforward Auxiliary Circuit", IEEE Transactions on Power Electronics, Vol. 14, No. 4, July 1999, pp. 653-662

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[J7] Y.F. Liu and P.C. Sen, "New Class-E DC-DC Converter Topologies with Constant switching frequency", IEEE Transactions on Industry Applications, Vol.32, No.4, July/August 1996, pp. 961-969

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[J6] Y.F. Liu and P.C. Sen, "Large Signal Modeling of Hysteric Current-Programmed Converters", IEEE Transactions on Power Electronics, Vol.11, No.3, May 1996, pp.423-430

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[J5] Y.F. Liu and P.C. Sen, "Source Reactance Lossless Switch (SRLS) for Soft-Switching Converters with Constant Switching Frequency", IEEE Transactions on Circuits and Systems, Vol.43, No.4, April 1996, pp. 301-312

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[J4] Y.F. Liu and P.C. Sen, "A Novel Resonant Converter Topology for DC-to-DC Power Supply", IEEE Transactions on Aerospace and Electronic Systems, Vol.31, No.4, October 1995, pp. 1301-1313

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[J3] Y.F. Liu and P.C. Sen, "A Novel Method to Achieve Zero-Voltage Regulation in Buck Converter", IEEE Transactions on Power Electronics, Vol.10, No.3, May 1995, pp. 292-301

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[J2] Y.F. Liu, P.C. Sen and S. Huang, "Function Control - A Novel Strategy to Achieve Improved Performance of the DC-to-DC Switching Regulators", IEEE Transactions on Industrial Electronics, Vol.42, No.2, April 1995, pp. 186-191

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[J1] Y.F. Liu and P.C. Sen, "A General Unified Large-Signal Model for Current Programmed DC-to-DC Converters", IEEE Transactions on Power Electronics, Vol.9, No.4, July 1994, pp. 414-424

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Conference Papers

[C65] E. Meyer, Z. Zhang and Y.F. Liu, "Controlled Current Source Circuit (CCSC) for Reduction of Output Voltage Overshoot in Buck Converters", IEEE Power Electronics Specialists Conference (PESC), Rhodes, Greece, June 2008, pp. 815-820.

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[C64] W. Eberle, Z. Zhang, Y.F. Liu and P.C. Sen, "A Simple Switching Loss Model for High Switching Frequency Voltage Regulators with Current Source Gate Drive," IEEE Power Electronics Specialists Conference (PESC), Rhodes, Greece, June 2008, pp. 3780-3786.

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[C63] Z. Zhang, W. Eberle, Y.F. Liu and P.C. Sen, "A Novel Non-Isolated ZVS Asymmetrical Buck Converter for 12V VRs," IEEE Power Electronics Specialists Conference (PESC), Island of Rhodes, Greece, June 2008, pp. 974-978.

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[C62] Z. Zhang,W. Eberle, Y.F. Liu and P.C. Sen, "A New Hybrid Gate Drive Scheme for Buck Voltage Regulators," IEEE Power Electronics Specialists Conference (PESC), Island of Rhodes, Greece, June 2008, pp. 2498-2504.

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[C61] E. Meyer and Y.F. Liu, "A Practical Minimum Time Control Method for Buck Converters Based on Capacitor Charge Balance", IEEE Applied Power Electronics (APEC), Austin, USA, February 2008, pp. 10-16.

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[C60] S. Ye, E. Meyer and Y.F. Liu, "A Novel Non-Isolated Two-Phase Full Bridge Topology for VRM Applications", IEEE Applied Power Electronics (APEC), Austin, USA, February 2008, pp. 24-30.

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[C59] S. Ye, E. Meyer and Y.F. Liu, "A Novel Isolated Two-Phase Full Bridge Topology for VRM Applications", IEEE Applied Power Electronics Conference (APEC), Austin, USA, February 2008, pp. 353-359.

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[C58] W. Eberle, Z. Zhang, Y.F. Liu and P.C. Sen, "A Simple Switching Loss Model for High Switching Frequency DC-DC Converters," IEEE Applied Power Electronics Conference (APEC), Austin, USA, February 2008, pp. 36-42.

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[C57] Z. Zhang, W. Eberle, Y.F. Liu and P.C. Sen, "A New Current-Source Gate Driver for a Buck Voltage Regulator," IEEE Applied Power Electronics Conference (APEC), Austin, USA, February 2008, pp. 1433-1439.

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[C56] W. Eberle, Z. Zhang, Y.F. Liu, and P.C. Sen "A High Efficiency Synchronous Buck VRM with Current Source Gate Driver" IEEE Power Electronics Specialists Conference (PESC), 2007, Orlando, USA, pp. 21-27.
PESC presentation

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[C55] E. Meyer and Y.F. Liu, "A Quick Capacitor Charge Balance Control Method to Achieve Optimal Dynamic Response for Buck Converters" IEEE Power Electronics Specialists Conference (PESC), 2007, Orlando, USA, pp. 1549-1555.
PESC presentation

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[C54] Z. Zhang, W. Eberle, Z. Yang, Y.F. Liu and P.C. Sen, "Optimal Design of Current Source Gate Driver for a Buck Voltage Regulator Based on a New Analytical Loss Model" IEEE Power Electronics Specialists Conference (PESC), 2007, Orlando, USA, pp. 1556-1562.
PESC presentation

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[C53] A. Elnady, A. Noureldin and Y.F. Liu, "Implementation of the Wiener Filter for Extracting Power Quality Disturbances" IEEE Power Electronics Specialists Conference (PESC), 2007, Orlando, USA, pp. 1116-1120.

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[C52] E. Meyer, G. Feng and Y.F. Liu, "Novel Digital Controller Improves Dynamic Response and Simplifies Design Process of Voltage Regulator Module" IEEE Applied Power Electronics Conference (APEC), 2007, Anaheim, USA, pp. 1447-1453.
APEC poster

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[C51] S. Ye, W. Eberle and Y.F. Liu, " A Novel Non-Isolated Full Bridge Topology for VRM Applications," IEEE Applied Power Electronics Conference (APEC), 2007, Anaheim, USA, pp. 134-140.
APEC presentation

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[C50] W. Eberle, Y.F. Liu and P.C. Sen, "A Resonant Gate Drive Circuit with Reduced MOSFET Switching and Gate Losses", IEEE Industrial Electronics Society Conference (IECON), 2006, Paris, France, pp. 1745-1750
IECON presentation

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[C49] K.Xu, Y.F. Liu and P.C. Sen, " A New Resonang Gate Drive Circuit Utilizing Leakage Inductance of Transformer", IEEE Industrial Electronics Society Conference (IECON), 2006, Paris, France, pp. 1933-1937
IECON presentation

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[C48] G. Feng, E. Meyer and Y.F. Liu, "High Performance Digital Control Algorithms For DC-DC Converters Based on the Principle of Capacitor Charge Balance", IEEE Power Electronics Specialists Conference (PESC), 2006, Jeju, South Korea, pp. 1740-1746
PESC presentation

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[C47] Z. Zhang, Z. Yang, S. Ye and Y.F. Liu, "Topology and Analysis of a New Resonant Gate Driver", IEEE Power Electronics Specialists Conference (PESC), 2006, Jeju, South Korea,pp. 1453-1459
PESC presentation

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[C46] W. Eberle, Y.F. Liu and P.C. Sen, "A Simple Large Signal Model for Isolated DC-DC Converters", IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), Ottawa, Canada, May 2006, pp. 1267-1270
CCECE presentation

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[C45] W. Eberle, P.C. Sen and Y.F. Liu, "A Novel High Performance Resonant Gate Drive Circuit with Low Circulating Current", IEEE Applied Power Electronics Conference (APEC), 2006, Dallas, USA,pp. 324-330
APEC presentation

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[C44] Z. Yang, S. Ye and Y.F. Liu, "A New Resonant Gate Drive Circuit for Synchronous Buck Converter", IEEE Applied Power Electronics Conference (APEC), 2006, Dallas, USA, pp. 52-58
APEC presentation

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[C43] Z. Yang, S. Ye and Y.F. Liu, "A New Dual Channel Resonant Gate Drive Circuit for Synchronous Rectifiers", IEEE Applied Power Electronics Conference (APEC), 2006, Dallas, USA, pp. 756-762
APEC presentation

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[C42] G. Feng, W. Eberle and Y.F. Liu, "A Digital Control Algorithm for DC-DC Converters Under Input Voltage Changes", IEEE Applied Power Electronics Conference (APEC), 2006, Dallas, USA, pp. 1430-1436
APEC poster

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[C41] W. Eberle, P.C. Sen and Y.F. Liu, "A New Resonant Gate Drive Circuit with Efficient Energy Recovery and Low Conduction Loss", IEEE Industrial Electronics Society Conference (IECON), 2005, pp. 650-655
IECON presentation

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[C40] K. Xu, Y.F. Liu and P.C. Sen, " A New Resonant Gate Drive Circuit with Centre-Tapped Transformer", IEEE Industrial Electronics Society Conference (IECON), 2005, pp. 639-644
IECON presentation

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[C39] A. Perry, G. Feng, Y.F. Liu and P.C. Sen, "A New Analysis and Design Method for Fuzzy Logic Controllers Used in Power Converters", IEEE Industrial Electronics Society Conference (IECON), 2005, pp. 1006-1011
IECON presentation

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[C38] Y.F. Liu and P.C. Sen, Invited Paper, "Digital Control of Switching Power Converters", International Conference on Control Applications (ICC), 2005, pp. 635-640

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[C37] Z. Yang, S. Ye and Y.F. Liu, "A New Transformer-Based Non-Isolated topology Optimized for VRM Application", IEEE Power Electronics Specialists Conference (PESC), 2005, pp. 447-453

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[C36] S. Ye, W. Eberle, Z. Yang and Y. F. Liu, " A New Non-Isolated Full Bridge Topology for Low Voltage High Current VRM Applications", IEEE Power Electronics Specialists Conference (PESC), 2005, pp. 389-395

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[C35] G. Feng, W. Eberle and Y. F. Liu, "A New Digital Control Algorithm to Achieve Optimal Dynamic Performance in DC-to-DC Converters", IEEE Power Electronics Specialists Conference (PESC), 2005, pp. 2744-2749

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[C34] W. Zhang, G. Feng, Y.F. Liu and B. Wu, "A New Duty Cycle Parallel Control Method and FPGA Implementation for AC-DC Converters with Power Factor Correction (PFC)", IEEE Applied Power Electronics Conference (APEC), 2005, pp. 805-810

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[C33] Z. Yang, S. Ye and Y.F. Liu, " A Novel Non-Isolated Half Bridge DC-DC Converter", IEEE Applied Power Electronics Conference (APEC), 2005, pp. 301-307

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[C32] Y.W. Lu and Y.F. Liu, "A Large-Signal Dynamic Model for Single-Phase AC-DC Converter with Power Factor Correction", IEEE Power Electronics Specialists Conference (PESC), 2004, pp. 1057-1063

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[C31] Y. Han and Y.F. Liu, "New Measurement Methods to Characterize Transformer Core Loss and Copper Loss in High-Frequency Switching Mode Power Supply", IEEE Power Electronics Specialists Conference (PESC), 2004, pp. 1695-1701

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[C30] W. Zhang, G. Feng, Y.F. Liu, and B. Wu, " A Direct Duty Cycle Calculation Algorithm for Digital Power Factor Correction (PFC) Implementation", IEEE Power Electronics Specialists Conference (PESC), 2004, pp. 2326-2332

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[C29] A. Perry, G. Feng, Y.F. Liu and P.C. Sen, "A New Sliding Mode-Like Control Method for Buck Converter", IEEE Power Electronics Specialists Conference (PESC), 2004, pp. 3688-3693

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[C28] A. Perry, G. Feng, Y.F. Liu and P.C. Sen, "A New Design Method for PI-like Fuzzy Logic Controllers Applied to DC-to-DC Converter", IEEE Power Electronics Specialists Conference (PESC), 2004, pp. 3751-3757

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[C27] G. Feng, W. Zhang and Y.F. Liu, " A New Current Feedback Fuzzy Logic Controller with Extended State Observer for DC-to-DC Converters", IEEE Applied Power Electronics Conference (APEC), 2004, pp. 1771-1777

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[C26] W. Zhang, G. Feng, Y.F. Liu and B. Wu, "DSP Implementation of Predictive Control Strategy for Power Factor Correction (PFC)", IEEE Applied Power Electronics Conference (APEC), 2004, pp. 67-73

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[C25] W. Eberle, Y. Han, Y.F. Liu and S. Ye, "An Overall Study of the Asymmetrical Half-Bridge with Unbalanced Turns and Current Mode Control", IEEE Applied Power Electronics Conference (APEC), 2004, pp. 1083-1089

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[C24] Y.W. Lu, G. Feng and Y.F. Liu, " A Large Signal Dynamic Model for DC-to-DC Converters with Average Current Control", IEEE Applied Power Electronics Conference (APEC), 2004, pp. 797-803

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[C23] W. Zhang, G. Feng, Y.F. Liu and B. Wu, "Analysis and Implementation of a New PFC Digital Control Method", IEEE Power Electronics Specialists Conference (PESC), 2003, pp. 335-340

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[C22] S. Ye and Y.F. Liu, "EMI Filter Design Method for Communication Power Sub-System", IEEE Applied Power Electronics Conference (APEC), 2003, 2003, pp. 483-489

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[C21] G. Feng, W. Zhang and Y.F. Liu, " An Adaptive Current Mode Fuzzy Logic Controller for DC-to-DC Converters", IEEE Applied Power Electronics Conference (APEC) 2003, pp. 983-989

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[C20] W. Zhang, G. Feng, Y.F. Liu and B. Wu, "A New Predictive Control Strategy for Power Factor Correction", IEEE Applied Power Electronics Conference (APEC), 2003, pp. 403-409

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[C19] G. Feng, W. Zhang and Y.F. Liu, "A New Adaptive Fuzzy Logic Control Method for DC-to-DC Converter", IEEE Industrial Electronics Society Conference (IECON), 2002, pp. 1208-1213

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[C18] W. Zhang, G. Feng, Y.F. Liu and Bin Wu, " A New Power Factor Correction (PFC) Control Method Suitable for Low Cost DSP", IEEE International Telecommunications Energy Conference (INTELEC), 2002, pp. 407-414

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[C17] W. Eberle and Y.F. Liu, "A Zero Voltage Switching Asymmetrical Half-Bridge DC/DC Converter With Unbalanced Secondary Windings For Improved Bandwidth", IEEE Power Electronics Specialists Conference (PESC), 2002, pp. 1829-1834

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[C16] G. Feng, Y.F. Liu and L. Huang, "A New Robust Controller to Improve the Dynamic Performance of Induction Motors", IEEE Power Electronics Specialists Conference (PESC), 2001, pp. 778 -783

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[C15] G. Feng and Y.F. Liu, " An Improved Nonlinear Control Strategy for Induction Motor Drive", IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), 2001, pp. 7-12

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[C14] Y. Zhang, P.C. Sen and Y.F. Liu, "A Novel Zero Voltage Switched (ZVS) Buck Converter Using Coupled Inductor", IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), 2001, pp. 357-362

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[C13] Y.F. Liu and P. Jain, "A New Current Sensing Scheme for Zero-Voltage Switching Phase-Shift Bridge Converter", IEEE International Telecommunications Energy Conference (INTELEC), 2000, pp. 567-573

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[C12] Y. Xi, P. Jain and Y.F. Liu, " A Precisely Regulated Multiple Output Forward Converter Topology", IEEE Applied Power Electronics Conference (APEC), 2000, pp. 986-992

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[C11] Y. Xi, P. Jain, Y.F. Liu and R. Orr, "A Zero Voltage Switching and Self-Reset Forward Converter Topology", IEEE Applied Power Electronics Conference (APEC), 1999, pp. 827-833

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[C10] S. Mangat, Y. Xi, P. Jain and Y.F. Liu, "A Modified Asymmetrical Pulse-Width-Modulated Resonant DC/DC Converter Topology", IEEE Power Electronics Specialists Conference (PESC), 1998, pp. 662-668

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[C9] Y. Xi, P. Jain, G. Joos and Y.F. Liu, " An Improved Zero Voltage Switching Flyback Converter Topology", IEEE Power Electronics Specialists Conference (PESC), 1998, pp. 923-929

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[C8] G. Moschopoulos, P. Jain, G. Joos and Y.F. Liu, "A Single Stage Vero Voltage Switched PWM Full-Bridge Converter with Power Factor Correction", IEEE Applied Power Electronics Conference (APEC), 1997, pp. 457-463

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[C7] G. Moschopoulos, P. Jain, G. Joos and Y.F. Liu, "A Zero-Voltage Switched PWM Boost Converter with an Energy Feedforward Auxiliary Circuit", IEEE Power Electronics Specialists Conference (PESC), 1996, pp. 76-82

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[C6] Y.F. Liu and P.C. Sen, " A Large Signal Model for Current-Programmed Boost Converter", IEEE Industry Application Society Conference, 1994, pp. 1106-1112

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[C5] Y.F. Liu and P.C. Sen, "New Class-E DC-to-DC Converter Topologies with Constant Switching Frequency", IEEE Industry Application Society Conference, 1993, pp. 1090-1097

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[C4] Y.F. Liu and P.C. Sen, "Source Reactance Lossless Switch (SRLS) for Soft Switching Converters with Constant Switching Frequency", IEEE Industry Application Society Conference, 1992, pp. 710-719

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[C3] Y.F. Liu, P.C. Sen and S. Huang, " Function Control - A novel Strategy to Achieve Improved Performance of the DC-to-DC Switching Regulators", IEEE Industry Application Society Conference, 1991, pp. 971-976

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[C2] H. Qu, Y.F. Liu and S. Huang, "Sliding-Mode Controlled Cuk Switching Regulator with Fast Response and First Order Dynamic Characteristic", IEEE Power Electronics Specialists Confer­ence (PESC), 1989, pp. 124-129

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[C1] Y.F. Liu and S. Huang, "Function Control and its Application in DC-DC Switching Regulator", IEEE Power Electronics Specialists Conference (PESC), 1988, pp. 377-383

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Patents

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[P12] Y.F. Liu, K. Xu, "Resonant Gate Drive Circuit with Centre-Tapped Transformer" US Patent, patent number 7,453,292 B2, Nov. 18,2008

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[P11] W. Zhang, Y.F. Liu, B. Wu, "Parallel Current Mode Control Using a Direct Duty Cycle Algorithm with Low Computational Requirements to Perform Power Factor .Correction", US Patent, patent number 7,317,625 B2, Jan. 8, 2008

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[P10] Y.F. Liu, S. Ye,"Non-Isolated DC-DC Converters with Direct Primary to Load Current", US Patent, patent number 7,307,857 B2, Dec. 11, 2007

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[P9] Y.F. Liu, S. Ye,"Non Isolated DC-DC Converters with Direct Primary To Load Current", US Patent, patent number 7,110,265 B2, Sept. 19, 2006

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[P8] Y.F. Liu, S. Ye, "Isolated DC-DC Converters", US Patent, patent number 7,079,403 B2, Jul. 18, 2006

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[P7] Y.F. Liu, R. Orr, K. Xu,"Apparatus and Method of Controlling Low Frequency Load Currents Drawn From a DC Source in a Telecommunications Systems", US Patent, patent number 6,980,783 B2, Dec. 27, 2005

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[P6] R.F. Orr, Y.F. Liu, D.A Brown, R. Duvnjak,"Signal and Power Transformers Coupling Arrangements", US Patent, patent number 6,911,746 B2, Jun. 28, 2005

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[P5] R.F. Orr, Y.F. Liu, R.P Colbeck, D.A Brown, H.F Horwitz,"Power Supply Controller", US Patent, patent number 6,850,048 B2, Feb. 1, 2005

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[P4] R.K. Orr, Y.F. Liu, "DC Converters", US Patent, patent number 6,771,518 B2, Aug. 3, 2004

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[P3] P.K. Jain, Y.F. Liu, "Topology and Control Method for Power Factor Correction", US Patent, patent number 6,344, 986 B1, Feb. 5, 2002

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[P2] P. Jain, Y.F. Liu, S. Mangat,"Asymmetrical Pulse Width Modulated Resonant DC-DC Converter with Compensating Circuitry", , US Patent, patent number 6,097,614, Aug. 1, 2000

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[P1] P.K. Jain, Y.F. Liu, Y. Xi "Flyback Converter with Soft Switching using Auxiliary Switch and Resonant Circuit", US Patent, patent number 6,005,782, Dec. 21, 1999

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