Solid State Circuits Society

February 11, 2010

(Please Note: 2nd Thursday for this month)  Our speaker was Prof. Edgar Sánchez-Sinencio (Texas A&M University) and the topic of his presentation was  “Low Drop-Out (LDO) Linear Regulators: Design Considerations and trends for High Power-Supply Rejection (PSR)“.

Abstract

Low-drop out (LDO) linear regulators are fundamental blocks in portable communications circuits and systems for power management. There are a number of LDO structure reported in the literature with different properties and applications. We present several families of LDOs designed for the same basic specifications and compare them in terms of load regulation, quiescent power, transient response for a load current step and in particular for power supply rejection (PSR). In addition, the structures of the LDOs are studied to determine what structures are more robust regarding PSR and how they can be improved to extend the high PSR at frequencies higher than 8 MHz Some conclusions and future work are presented.

Biography

Edgar Sánchez-Sinencio (F’92) was born in Mexico City, Mexico. He received the degree in communications and electronic engineering (Professional degree) from the National Polytechnic Institute of Mexico, Mexico City, the M.S.E.E. degree from Stanford University, CA, and the Ph.D. degree from the University of Illinois at Champaign-Urbana, in 1966, 1970, and 1973, respectively. His research work has more than 2,320 citations according to the Thomson Reuters Scientific Citation Index. He has graduated 42 M.Sc. and 31 Ph.D. students. He is a co-author of six books on different topics, such as RF Circuits, Low Voltage Low Power Analog Circuits and Neural Networks.  He is currently the TI J. Kilby Chair Professor and Director of the Analog and Mixed-Signal Center at Texas A&M University. He is the former Editor-in-Chief of IEEE Transactions on Circuits and Systems II. In November 1995 he was awarded a Honoris Causa Doctorate by the National Institute for Astrophysics, Optics and Electronics, Mexico. This degree was the first honorary degree awarded for microelectronic-circuit-design contributions. He is co-recipient of the 1995 Guillemin-Cauer for his work on cellular networks. He was also the co-recipient of the 1997 Darlington Award for his work on high-frequency filters. He received the Circuits-and-Systems-Society Golden Jubilee Medal in 1999. He also received the prestigious IEEE Circuits-and-Systems-Society 2008 Technical Achievement Award. He was the IEEE Circuits-and-Systems Society’s Representative to the Solid-State Circuits Society (2000-2002). He was a member of the IEEE Solid-State Circuits Society Fellow Award Committee from 2002 to 2004. He is a former IEEE CAS Vice President – Publications. His present interests are in the area of power management, RF-communication circuits, analog and medical electronics circuit design. He has been an IEEE Fellow since 1992.

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