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Book Chapters | Publications | Patents

Book Chapters

B1: D. Ma, R. Bondade, "Power Management IC Design for Efficient DVFS On-Chip Operation," in Integrated Microsystems and Nanotechnology: MEMs, Photonic and Biological Interfaces, (Editor: K. Iniewski), John Wiley & Sons, to appear.

Journal Publications

J29: Y. Wang, D. Ma, "Design of Integrated Dual-Loop Delta-Sigma Modulated Switching Power Converter for Adaptive Wireless Powering in Biomedical Implants", IEEE Trans. on Industrial Electronics (TIE), to appear.

J28: Y. Zhang, R. Bondade, D. Ma, "On-Chip SIMO Power Converter Design with Adaptive Cross Regulation and Supply Variation Control for Power-Efficient VLSI Systems", Special Issue on Low Power Design and Verification Techniques, Journal of Low Power Electronics (JOLPE), to appear.

J27: Y. Wang, M. Koen, D. Ma, "Low-Noise CMOS TGC Amplifier with Adaptive Gain Control for Ultrasound Imaging Receiver," IEEE Trans. on Circuits and Systems, Part II, (TCAS-II), to appear.

J26: H. Chen, B. Wei, D. Ma, "Energy Storage and Management System with Carbon Nanotube Supercapacitor and Multi-Directional Power Delivery Capability for Autonomous Wireless Sensor Nodes," Special Issue on Power Electronics for Microgrids 2010, IEEE Trans. on Power Electronics (TPE), pp. 2897-2909, Vol. 25, No. 12, Dec. 2010.

J25: R. Bondade, D. Ma, "Self-Reconfigurable Channel Data Buffering Scheme and Circuit Design for Adaptive Flow Control in Power-Efficient Network-on-Chips," IEEE Trans. on Circuits & Systems, Part I, (TCAS I), pp. 2890-2903, Vol. 57, No. 11, Nov. 2010.

J24: C. Zheng, D. Ma, "Design of Monolithic Low Drop-out Regulator for Wireless Powered Brain Cortical Implants Using a Line Ripple Rejection Technique," IEEE Trans. on Circuits & Systems, Part II, (TCAS II), Vol. 57, No. 9, pp. 686-690, Sept. 2010.

J23: A. Mitev, M. Marefat, D. Ma, and J. M. Wang, "Principle hessian direction based parameter reduction for interconnect networks with process variation," IEEE Trans. on Very Large Scale Integrated Systems (TVLSI), Vol. 18, No. 9, pp. 1337-1347, Sept. 2010.

J22: F. Luo, D. Ma, "Design of Digital Tri-Mode Adaptive-Output Buck-Boost Power Converter for Power-Efficient Integrated Systems," IEEE Trans. on Industrial Electronics (TIE), Vol. 57, No. 6, pp. 2151-2160, June 2010.

J21: D. Ma, R. Bondade, "Enabling Power-Efficient DVFS Operations on Silicon," (Invited Paper, Feature Article) IEEE Circuits & Systems Magazine, Vol. 10, No. 1, pp. 14-29, 1st Quarter, 2010.

J20: D. Ma, L. Su, M. Somasundaram, "Integrated Interleaving SC Power Converters with Analog and Digital Control Schemes for Energy-Efficient Microsystems," Journal of Analog Integrated Circuits and Signal Processing, Vol. 62, Issue 3, pp. 361-372, March 2010.

J19: L. Su, D. Ma, A. P. Brokaw, "Design and Analysis of Monolithic Step-Down Switched-Capacitor Power Converter with Subthreshold DPWM Control for Self-Powered Wireless Sensors," IEEE Trans. on Circuits & Systems (TCAS), Part-I, Vol. 57, No. 1, pp. 280-290, Jan. 2010.

J18: I. Chowdhury, D. Ma, "Design of Reconfigurable and Robust Integrated SC Power Converter for Self-Powered Energy-Efficient Devices," IEEE Trans. on Industrial Electronics (TIE), (invited paper), Vol. 56, No. 10, pp. 4018-4028, Oct. 2009.

J17: D. Ma, C. Zheng, M. Koen, H. Chao, "Low-Power Variable-Gain CMFB-Free Current Feedback Amplifier for Ultrasound Medical Imaging," Journal of Analog Integrated Circuits and Signal Processing, DOI 10.1007/s10470-009-9296-8, No. 3, pp. 171-179, March 2009.

J16: F. Luo, D. Ma, "Integrated Switching DC-DC Converter with a Pulse-Train/PWM Control," IEEE Trans. on Circuits & System (TCAS), Part II, Vol. 56, No. 2, pp. 152-156, Feb. 2009.

J15: J. Sun, J. Li, D. Ma, J. Wang, "Chebyshev Affine Arithmetic Based Parameter Yield Prediction under Limited Prescriptions of Uncertainty," IEEE Trans. on Computer-Aided Design of Integrated Circuits & Systems (TCAD), Vol. 27, No. 10, pp. 1852-1866, Oct. 2008.

J14: D. Ma, J. Wang, M. Song "Adaptive On-Chip Power Supply with Robust One-Cycle Control Technique", IEEE Trans. on Very Large Scale Integration Systems (TVLSI), Vol. 16, No. 9, pp. 1240-1243, Sept. 2008.

J13: D. Ma, F. Luo, "Robust Multiple-Phase Switched-Capacitor DC-DC Power Converter with Digital Interleaving Regulation", (invited) IEEE Trans. on Very Large Scale Integration Systems (TVLSI), Special Section on Low-Power Electronics and Design, pp. 611-619, Vol. 16, No. 6, June 2008.

J12: K. K. Muchherla, P. Chen, D. Ma, J. Wang, "A Non-Iterative Equivalent Waveform Model for Timing Analysis in Presence of Crosstalk", ACM Trans. on Design Automation of Electronic Systems (TODAES), pp. 1-21, Vo. 13, Issue 2, Article 25, April 2008.

J11: A Mitev, M. Marefat, D. Ma, J. Wang, "Parameter Reduction for Variability Analysis by Slice Inverse Regression (SIR) Method," (invited), IEE Proceedings for Circuit, Devices and Systems, pp. 16-22, Vol. 2, Issue 1, Feb. 2008.

J10: K. Sanborn, D. Ma, V. Ivanov, "A Sub-1V Low Noise Bandgap Voltage Reference", IEEE Journal of Solid-State Circuits (JSSC), Vol. 42, No. 11, pp. 2466-2481, Nov. 2007. (IEEE JSSC Top 10 Downloads)

J9: D. Ma, W-H Ki, "Fast-Transient PCCM Switching Converter with Freewheel Switching Control," IEEE Trans. on Circuits and Systems (TCAS), Part II, Vol. 54, No. 9, pp. 825-829, Sept. 2007.

J8: D. Ma, "Automatic Substrate Switching Circuit for On-Chip Adaptive Power Supply System", IEEE Trans. on Circuits & Systems (TCAS) - Part II, Vol. 54, No. 7, pp. 641-645, July 2007.

J7: J. Wang, B. Sukhwani, U. Padmanabhan, D. Ma, K. Sinha, "Simulation and Design of Nanocircuits with Resonant Tunneling Devices", IEEE Trans. on Circuits & Systems (TCAS) - Part I, Vol. 54, No. 6, pp. 1293-1304, June 2007.

J6: D. Ma, Z. Zhang, "Thermal Compensation Method for CMOS Digital Integrated Circuits Using Temperature-Adaptive DC-DC Converter", IEEE Trans. on Circuits & Systems (TCAS) - Part II, Vol. 53, No. 11, pp. 1284-1288, Nov. 2006.

J5: A. Oksasoglu, D. Ma, Q. Wang, "Rank One Chaos in Switch-Controlled Murali-Lakshmanan-Chua Circuit", International Journal of Bifurcation and Chaos, Vol. 16, No. 11, pp. 3207-3224, Nov. 2006.

J4: D. Ma, W-H Ki, C-Y Tsui, "An Integrated One-Cycle Control Buck Converter with Adaptive Output and Dual-Loop Output Error Correction", IEEE Journal of Solid-State Circuits (JSSC), Vol. 39, No. 1, pp. 140-149, Jan. 2004.

J3: D. Ma, W-H Ki, C-Y Tsui, "A Pseudo-CCM/DCM SIMO Switching Converter with Freewheel Switching", IEEE Journal of Solid-State Circuits (JSSC), Vol. 38, No. 6, pp. 1007-1014, June 2003.

J2: D. Ma, W-H Ki, C-Y Tsui and P. K. T. Mok, "Single-Inductor Dual-Output CMOS Switching Converters in Discontinuous-Conduction Mode with Time-Multiplexing Control", IEEE Journal of Solid-State Circuits (JSSC), Vol. 38, No. 1, pp. 89-100, Jan. 2003.

J1: K. Kan, D. Ma, K. Mak and H. Luong, "Design, Theory and Performance of 1-GHz CMOS Downconversion and Upconversion Mixers," Journal of Analog Integrated Circuits & Signal Processing, Vol. 24, No. 8, pp. 101-111, Aug. 2000.

Conference Publication

C56: J. Sankman, H. Chen, D. Ma, "Supercapacitor-Based Reconfigurable Energy Management Unit for Autonomous Wireless Sensor Nodes," IEEE International Symposium on Circuits and Systems (ISCAS), Rio de Janeiro, Brazil, May 2011, accepted for publication.

C55: S. Uprey, H. Chen, D. Ma, "Quasi-Hysteretic Floating Buck LED Driver with Adaptive Off-Time for Accurate Average Current Control in High Brighteness Lighting," IEEE International Symposium on Circuits and Systems (ISCAS), Rio de Janeiro, Brazil, May 2011, accepted for publication.

C54: Y. Zhang, D. Ma, "Integrated SIMO DC-DC Converter with on-Line Charge Meter for Adaptive PCCM Operation," IEEE International Symposium on Circuits and Systems (ISCAS), Rio de Janeiro, Brazil, May 2011, accepted for publication.

C53: H. Chen, D. Ma, X. Wu, "High-Efficiency LED Driver IC with Quasi-Fixed Frequency and Accurate Current Control," PCIM Asia 2011 International Exhibition and Conference for Power Electronics, Intelligent Motion and Power Quality, Shanghai, China, June 2011, accepted for publication.

C52: H. Chen, B. Wei, D. Ma, "On-Chip Energy Management System with Carbon Nanotube Supercapacitors", ASME 2010 International Mechanical Engineering Congress & Exposition, Vancouver, Canada, Nov. 2010, accepted for publication.

C51: L. Su, D. Ma, "A Monolithic Reconfigurable SC Power Converter with Adaptive Gain Control and On-Chip Capacitor Sizing", the 2010 IEEE Energy Conversion Congress and Exposition, pp. 2713-2717, Atlanta, Georgia, USA, Sept. 2010.

C50: Y. Zhang, R. Bondade, D. Ma, S. Abedinpour, "An Integrated SIDO Boost Power Converter with Adaptive Freewheel Switching Technique", the 2010 IEEE Energy Conversion Congress and Exposition (ECCE), pp. 3516-3522, Atlanta, Georgia, USA, Sept. 2010.

C49: D. Ma, "Power Management IC Design for Efficient DVFS On-Chip Operation", 2010 CMOS Emerging Technologies Workshop, Whistler, BC, Canada, May 2010, invited talk.

C48: R. Bondade, D. Ma, "Hardware-Software Co-Design of an Embedded Power Management Module with Adaptive On-Chip Power Processing Schemes", in the Proc. of 2010 IEEE International Symposium on Circuits and Systems (ISCAS), pp. 617-620, Paris, France, May 2010.

C47: I. Chowdhury, D. Ma, P. Prazak and F. Highton, "Monolithic CMOS HD Radio: Architecture Design and Front-End Implementation", in the Proc. of 2010 IEEE International Symposium on Circuits and Systems (ISCAS), pp. 489-492, Paris, France, May 2010.

C46: C. Zheng, D. Ma, "A 10-MHz 92.1%-Efficiency Green-Mode Automatic Reconfigurable Switching Converter with Adaptively Compensated Single-Bound Hysteresis Control," IEEE International Solid-State Circuits Conference (ISSCC), pp. 204-205, San Francisco, CA, Feb. 2010.

C45: Y. Zhang, D. Ma, "Digitally Controlled Integrated Pseudo-CCM SIMO Converter with Adaptive Freewheel Current Modulation," the 25th IEEE Applied Power Electronics Conference & Exposition (APEC), pp. 284-288, Palm Springs, CA, Feb. 2010.

C44: P. Ngo, D. Ma, "Integrated Switched-Capacitor Voltage Doubler with Clock Transition Periods Boosting and Transfer Blocking Techniques," the 25th IEEE Applied Power Electronics Conference & Exposition (APEC), pp. 813-817, Palm Springs, CA, Feb. 2010.

C43: L. Su, D. Ma, "Design of Monolithic Master-Slave SC Power Converter for Ultra-low Power Energy-Harvesting Microsensors," 35th Annual Conference of the IEEE Industrial Electronics Society (IECON), pp. 1849-1854, Porto, Portugal, Nov. 2009.

C42: Y. K. Wang, C. Zheng, D. Ma, "Integrated Variable-Output Switching Converter with Dual-Loop Delta-Sigma Modulation for Adaptive Wireless Powering in Implantable Devices," 35th Annual Conference of the IEEE Industrial Electronics Society (IECON), pp. 583-588, Porto, Portugal, Nov. 2009.

C41: R. Bondade, D. Ma, "A DLL-Regulated SIMO Power Converter for DVS-Enabled Power-Aware VLSI Systems", IEEE Midwest Symposium on Circuits and Systems (MWSCAS), pp. 961-964, Cancun, Mexico, Aug. 2009.

C40: F. Luo, D. Ma, "An Adaptive Single Inductor Multiple Output Buck-Boost Converter with Digital Adaptive Power Allocation Control for Dynamic Voltage Scaling Application", TECHCON 2009, Austin, TX, Sept. 2009, accepted for presentation.

C39: F. Luo, R. Bondade and D. Ma, "Software-Defined SIMO Step-Up/Down Power Converter with Adaptive Global/Local Power Allocation Scheme for DVS-Enabled Multicore Systems", IEEE/ACM International Symposium on Low Power Electronics (ISLPED), pp. 319-322, San Francisco, CA, August 2009.

C38: D. Nguyen, H. Cormican, A. Baysal, C. Wiswall, T. Kerr, J. Wang, D. Ma, "A Breast Molecular Imaging Hybrid Pixel Sensor Test Chip with Low Noise CMOS Readout IC on Fully Depleted SOI Design," 2009 IEEE/ICME International Conference on Complex Medical Engineering, April 2009, accepted for presentation.

C37: L. Su, D. Ma, "A Monolithic Step-Down SC Power Converter with Frequency-Programmable Subthreshold z-Domain DPWM Control for Ultra-Low Power Microsystems", 34th European Solid-State Circuits Conference (ESSCIRC), pp. 58-61, Edinburgh, UK, Sept., 2008.

C36: I. Chowdhury, D. Ma, "On-Chip Reconfigurable SC Power Supply with Adaptive Gain/Pulse Control for Self-Powered Energy-Efficient Devices," IEEE International Symposium on Industrial Electronics (ISIE), pp. 1715-1720, Cambridge, UK, July 2008.

C35: F. Luo, D. Ma, "Integrated Adaptive Step-Up/Down Switching DC-DC Converter with Tri-Band Tri-Mode Digital Control for Dynamic Voltage Scaling," IEEE International Symposium on Industrial Electronics (ISIE), pp. 142-147, Cambridge, UK, July 2008.

C34: M. Song, I. Chowdhury, D. Ma and A. P. Brokaw, "Adaptive step-down switched-capacitor power converter with z-domain observation-based line-load regulation," IEEE VLSI Symp. on Circuits, pp. 134-135, Honolulu, Hawaii, USA June 2008.

C33: L. Su, D. Ma, "Design and Optimization of Integrated Low-Voltage Low-Power Monolithic CMOS Charge Pumps," 19th IEEE International Symposium on Power Electronics, Electrical Drives, Automation and Motions (SPEEDAM), pp. 43-48, Ichita, Italy, June 2008.

C32: D. Nguyen, H. Cormican, A. Baysal, J. Wang, D. Ma, "A Mammography Imaging Hybrid Pixel Sensor Test Chip with Low Noise CMOS Readout IC on Fully Depleted SOI - Design Tradeoff Study," 9th International Conference on Applications for Nuclear Techniques, Crete, Greece, June 2008, accepted for publication.

C31: F. Luo, D. Ma, "A Low-Ripple Fast-Response CMOS Integrated Switching Buck Converter with Dual-Mode Pulse-Train/PWM Control," 39th IEEE Power Electronics Specialist Conference (PESC), pp. 3432-3436, Islands of Rhodes, Greece, June 2008.

C30: I. Chowdhury, D. Ma, "An Integrated Reconfigurable Switched-Capacitor DC-DC Converter with Dual-Loop Adaptive Gain-Pulse Control," IEEE International Symp. on Circuits & Systems (ISCAS), pp. 2610-2613, Seattle, USA, May 2008.

C29: A. Mitev, M. Marefact, D. Ma, J. Wang, "Principle Hessian Direction based Parameter Reduction for Interconnect Networks with Process Variation", IEEE/ACM International Conference on CAD (ICCAD), pp. 632-637, San Jose, CA, USA, Sept. 2007, (Best Paper Award Nomination).

C28: M. Song, D. Ma, "A Fast-Transient Over-Sampled Delta-Sigma Adaptive DC-DC Converter for Power-Efficient Noise-Sensitive Devices", IEEE/ACM International Symposium on Low Power Electronics (ISLPED), pp. 286-291, Portland, USA, August 2007.

C27: F. Luo, D. Ma, "An Integrated Switching Power Converter with a Hybrid Pulse-Train/PWM Control", IEEE International Symposium on Circuits and Systems (ISCAS), pp. 305-308, New Orleans, LA, USA, May 2007.

C26: A. Mitev, M. Marefact, D. Ma, J. Wang, "Parameter Reduction for Variability Analysis by Slice Inverse Regression (SIR) Method", IEEE Asia and South Pacific Design Automation Conference (ASPDAC), pp. 468-473, Yokohama, Japan, Jan. 2007.

C25: H. Chao, D. Ma, M. Koen, P. Prazak, "CMOS Low-Power Variable-Gain CMFB-Free Current Feedback Amplifier for Ultrasound Diagnostic Applications", IEEE Asian Solid-State Circuits Conference (A-SSCC), pp. 427-430, Hangzhou, China, Nov. 13-15, 2006.

C24: N. S. Mohan, D. Ma, "Low-Ripple CMOS Switched-Capacitor Power Converter With Closed-Loop Interleaving Regulation", IEEE Custom Integrated Circuits Conferences (CICC), pp. 245-248, Sept. 2006.

C23: D. Ma, V. Vazquas, "Adaptive Switching Power Converter with Dual-Loop Switched-Capacitor Controller and On-Chip Output Capacitor", 32nd European Solid-State Circuits Conference (ESSCIRC), pp. 524-527, Montreux, Switzerland, Sept. 18-22, 2006.

C22: K. Sanborn, D. Ma, I. Vadim, "A Sub-1V Low-Noise Bandgap Voltage Reference", IEEE Custom Integrated Circuits Conferences (CICC), pp. 607-610, Sept. 2006.

C21: D. Ma, J. Wang, P. Vazquaz "Adaptive On-Chip Power Supply With Robust One-Cycle Control Technique", IEEE/ACM International Symposium Power Electronics (ISLPED), pp. 400-405, Germany 2006.

C20: D. Ma, "Robust Multiple-Phase Switched-Capacitor DC-DC Converter with Digital Interleaving Regulation Scheme", IEEE/ACM International Symposium on Low on Low Power Electronics (ISLPED), pp. 394-399, Germany 2006.

C19: F. Luo, D. Ma, "A Periodically Kicked Chaos Circuit For Rank-One Attractor Generation", IEEE International Midwest Symposium on Circuits and Systems (MWSCAS), pp. San Juan, Puerto Rico, Aug. 2006.

C18: D. Ma, "Automatic Substrate Switching Circuit for On-Chip Adaptive Power Supply System," IEEE International Symposium on Circuits & Systems (ISCAS), pp. 192-196, 2757-2760, Greece, 2006.

C17: N. S. Mohan, D. Ma, "Integrated Low-Ripple-Voltage Fast-Response Switched-Capacitor Power Converter with Interleaving Regulation Scheme", IEEE International Symposium on Circuits & Systems (ISCAS), pp. 3129-3133, Greece, 2006.

C16: H. Chao, D. Ma, "CMOS Variable-Gain Wide-Bandwidth CMFB-Free Differential Current Feedback Amplifier for Ultrasound Diagnostic Applications", IEEE International Symposium on Circuits & Systems (ISCAS), pp. 649-653, Greece 2006.

C15: J. Wang, B. Srinivas, D. Ma, C. Chen, J. Li, "System-Level Power and Thermal Modeling and Analysis by Orthogonal Polynomial based Response Surface Approach", IEEE/ACM International Conference on Computer Aided Design(ICCAD), pp. 728-735, Nov. 2005.

C14: D. Ma, J. Wang, N. S. Mohan, Z. Hu, "Design and Optimization on Dynamic Power System for Self-Powered Integrated Wireless Sensing Nodes," IEEE International Symposium on Low Power Electronics (ISLPED), pp. 303-306, Aug. 2005.

C13: Z. Hu and D. Ma, "A Pseudo-CCM Buck Converter with Freewheel Switching Control," IEEE International Symposium on Circuits & Systems (ISCAS), pp. 3083-3086, May 2005.

C12: C. Zhang, D. Ma, "Integrated Adaptive DC/DC Conversion with Adaptive Pulse-Train Technique for Low-Ripple Fast-Response Regulation", IEEE International Symposium on Low Power Electronics (ISLPED), pp. 257-262, Aug. 2004.

C11: H. Lam, W-H Ki, C-Y Tsui and D. Ma, "Integrated 0.9V Charge-Control Switching Converter with Self-Biased Current Sensor," IEEE Intl. Midwest Symp. on Ckts & Syst, July 2004.

C10: D. Ma, V. Tam, W-H Ki and H. Lam, "A CAD Simulator Based on Loop Gain Measurement for Switching Converters," IEEE International Symposium on Circuits & Systems, pp. 940-943, Canada, May 2004.

C9: H. Y. H. Lam, W-H Ki and D. Ma, "Loop Gain Analysis and Development of High-Speed High-Accuracy Current Sensors for Switching Converters," IEEE International Symposium on Circuits & Systems, pp. 828-831, May 2004.

C8: D. Ma, W-H Ki, C-Y Tsui, "Fast Adaptive DC-DC Conversion Using Dual-Loop One-Cycle Control in Standard Digital CMOS Process," (Best Design Award) IEEE/ACM Design Automation Conference- Asia & South Pacific, pp. 539-540, Jan. 2004.

C7: D. Ma, W-H Ki, C-Y Tsui, "A Fast-Response Adaptive-Output Switching Converter with On-Chip Dual-Loop One-Cycle Control", IEEE European Solid-State Circuits Conf. (ESSCIRC), pp. 379-382, Italy, Sept. 2002.

C6: D. Ma, W-H Ki, C-Y Tsui, "A Pseudo-CCM / DCM SIMO Switching Converter with Freewheel Switching", IEEE International Solid-State Circuit Conference (ISSCC), pp. 390-391, San Francisco, Feb. 2002.

C5: W-H Ki, D. Ma, "Single Inductor Multiple Output Switching Converters", IEEE Power Electronic Specialist Conference (PESC), Vol. 1, pp. 226-231, Vancouver, June 2001.

C4: D. Ma, W-H Ki, C-Y Tsui and P. K. T. Mok, "Single Inductor Multiple Output Converters with Bipolar Outputs", IEEE International Symposium on Circuits and Systems (ISCAS), pp. 301-304, Sydney, Australia, May 2001.

C3: D. Ma, W-H Ki, "Single-Inductor Dual-Output Integrated Boost Converter for Portable Applications," 4th IEEE Workshop on Switch Mode Power Converter, pp. 42-52, 2001.

C2: K-K Kan, K-C Mak, D. Ma and H. C. Luong, "A 2-V 900-MHz CMOS Mixer for GSM Receivers," IEEE International Symposium on Circuits & Systems, pp. 327-330, Geneva, Switzerland, June 2000.

C1: D. Ma, W-H Ki, C-Y Tsui and P. K.T. Mok, "Single-Inductor Dual-Output Converter for Power Reduction Techniques", IEEE VLSI Symposium on Circuits (VLSI), pp. 137-140, Japan, June 2001

Patents

D. Ma, Y. Zhang, "Adaptive Freewheel Switching Control Mechanisms and Circuits for DC-DC Converters Operating in PCCM," Invention Disclosure, UA10-039, Oct. 29, 2009.

I. Chowdhury, D. Ma, "Adaptive-Gain Step-Up/Down Switched-Capacitors DC-DC Converters," US Patent No. US 08/84182, Nov. 20, 2008.

D. Ma, W-H Ki, C-Y Tsui, "Single-Inductor Multiple-Output Switching Converters in PCCM with Freewheel Switching," US Patent No. US. 7,432,614 B2, Oct. 7, 2008.

D. Ma, C. Zhang, "Thermal Compensation Method for CMOS Integrated Digital Circuits Using Temperature-Adaptive Digital DC/DC Converter," US Patent No. 7,345,460, March 18, 2008.

Last Updated: 05-Jan-2011