Abstract:
This paper presents a pilot-based clock and data recovery (CDR) technique for high-speed serial link applications where a low-amplitude clock signal, i.e., a pilot, is ad...Show MoreMetadata
Abstract:
This paper presents a pilot-based clock and data recovery (CDR) technique for high-speed serial link applications where a low-amplitude clock signal, i.e., a pilot, is added to the transmit signal. The clock tone is extracted at the receiver using an injection-locked oscillator and is used to drive the receiver front-end samplers. The performance of the CDR technique is demonstrated using a 5 Gbps differential receiver fabricated in a 0.13 μm IBM CMOS technology. The clock and data recovery circuit implementation has an area of 0.171 mm2 and consumes 11.75 mA from a 1.5 V supply voltage at 5 Gbps. The recovered clock peak-to-peak and RMS jitter at 5 Gbps are less than 10 ps (5%UI) and 1.6 ps (0.8%UI), respectively with an effective CDR loop bandwidth of approximately 28 MHz at a bit-error rate (BER) of 10-12 . The proposed technique simplifies the CDR design and provides data and inter-symbol interference (ISI) independent performance with a small ≈5% pilot voltage overhead to the transmitted data signal.
Published in: IEEE Journal of Solid-State Circuits ( Volume: 45, Issue: 8, August 2010)
Advanced Micro Devices, Inc., Boxborough, MA, USA
Mahmoud Reza Ahmadi (S'05) received the Ph.D. degree from the University of Minnesota–Twin Cities, Minneapolis, MN, in 2010, the M.A.Sc. degree from the University of Waterloo, Waterloo, ON, Canada, in 2004 and the B.Sc. degree from Sharif University of Technology, Tehran, Iran, in 2000, all in electrical engineering.
He is currently a Senior Analog Designer at Advanced Micro Devices (AMD), Boxborough, MA, involved in desi...Show More
Mahmoud Reza Ahmadi (S'05) received the Ph.D. degree from the University of Minnesota–Twin Cities, Minneapolis, MN, in 2010, the M.A.Sc. degree from the University of Waterloo, Waterloo, ON, Canada, in 2004 and the B.Sc. degree from Sharif University of Technology, Tehran, Iran, in 2000, all in electrical engineering.
He is currently a Senior Analog Designer at Advanced Micro Devices (AMD), Boxborough, MA, involved in desi...View more
Rambus, Inc., Los Altos, CA, USA
Amir Amirkhany (M'02) received the Ph.D. degree from Stanford University, Stanford, CA, in 2008, the M.Sc. degree from the University of California, Los Angeles, in 2002, and the B.Sc. degree from Sharif University of Technology, Tehran, Iran, in 1999, all in electrical engineering.
He is currently a Principal Engineer at Rambus Inc., Los Altos, CA, designing next-generation high-speed memory interfaces for graphics applic...Show More
Amir Amirkhany (M'02) received the Ph.D. degree from Stanford University, Stanford, CA, in 2008, the M.Sc. degree from the University of California, Los Angeles, in 2002, and the B.Sc. degree from Sharif University of Technology, Tehran, Iran, in 1999, all in electrical engineering.
He is currently a Principal Engineer at Rambus Inc., Los Altos, CA, designing next-generation high-speed memory interfaces for graphics applic...View more
University of Minnesota, Twin-Cities, Minneapolis, MN, USA
Ramesh Harjani (S'87–M'89–SM'00–F'05) received the Ph.D. degree from Carnegie Mellon University, Pittsburgh, PA, in 1989, the M.S. degree from the Indian Institute of Technology, New Delhi, in 1984, and the B.S. degree from the Birla Institute of Technology and Science, Pilani, in 1982, all in electrical engineering.
He is a Professor in the Department of Electrical and Computer Engineering and a Member of the graduate fac...Show More
Ramesh Harjani (S'87–M'89–SM'00–F'05) received the Ph.D. degree from Carnegie Mellon University, Pittsburgh, PA, in 1989, the M.S. degree from the Indian Institute of Technology, New Delhi, in 1984, and the B.S. degree from the Birla Institute of Technology and Science, Pilani, in 1982, all in electrical engineering.
He is a Professor in the Department of Electrical and Computer Engineering and a Member of the graduate fac...View more
Contents Advanced Micro Devices, Inc., Boxborough, MA, USA
Mahmoud Reza Ahmadi (S'05) received the Ph.D. degree from the University of Minnesota–Twin Cities, Minneapolis, MN, in 2010, the M.A.Sc. degree from the University of Waterloo, Waterloo, ON, Canada, in 2004 and the B.Sc. degree from Sharif University of Technology, Tehran, Iran, in 2000, all in electrical engineering.
He is currently a Senior Analog Designer at Advanced Micro Devices (AMD), Boxborough, MA, involved in design and development of high-speed memory interface architectures and circuits. In 2007, he was with Rambus Inc., Los Altos, CA, as a design engineering intern, designing clock and data recovery circuits for serial links, and with Qualcomm Inc., Silicon Valley Group, CA, as an engineering intern in 2008, where he was designing fractional-N frequency synthesizers for wireless applications. His main research interests are advanced signaling, equalization schemes and CDR circuits for chip-chip communication and clock generation for wireless applications.
Mr. Ahmadi is the recipient of the AMD Fellowship Award at the IEEE Custom Integrated Circuit Conference 2009 and the Best Paper Award in Digital and High Speed Circuit Design at TECHON 2007.
Mahmoud Reza Ahmadi (S'05) received the Ph.D. degree from the University of Minnesota–Twin Cities, Minneapolis, MN, in 2010, the M.A.Sc. degree from the University of Waterloo, Waterloo, ON, Canada, in 2004 and the B.Sc. degree from Sharif University of Technology, Tehran, Iran, in 2000, all in electrical engineering.
He is currently a Senior Analog Designer at Advanced Micro Devices (AMD), Boxborough, MA, involved in design and development of high-speed memory interface architectures and circuits. In 2007, he was with Rambus Inc., Los Altos, CA, as a design engineering intern, designing clock and data recovery circuits for serial links, and with Qualcomm Inc., Silicon Valley Group, CA, as an engineering intern in 2008, where he was designing fractional-N frequency synthesizers for wireless applications. His main research interests are advanced signaling, equalization schemes and CDR circuits for chip-chip communication and clock generation for wireless applications.
Mr. Ahmadi is the recipient of the AMD Fellowship Award at the IEEE Custom Integrated Circuit Conference 2009 and the Best Paper Award in Digital and High Speed Circuit Design at TECHON 2007.View more
Rambus, Inc., Los Altos, CA, USA
Amir Amirkhany (M'02) received the Ph.D. degree from Stanford University, Stanford, CA, in 2008, the M.Sc. degree from the University of California, Los Angeles, in 2002, and the B.Sc. degree from Sharif University of Technology, Tehran, Iran, in 1999, all in electrical engineering.
He is currently a Principal Engineer at Rambus Inc., Los Altos, CA, designing next-generation high-speed memory interfaces for graphics applications. Prior to Stanford, he was with Sequoia Communications, working on the ASIC design of WCDMA systems. His main research interests include the design and implementation of communication systems, circuit design, and application of communication and signal processing techniques to the design of low-power circuits.
Dr. Amirkhany was a recipient of a Best Student Paper Award at the IEEE Global Communications Conference in 2006 for his work on the design and analysis of an analog multi-tone system for chip-to-chip interconnects.
Amir Amirkhany (M'02) received the Ph.D. degree from Stanford University, Stanford, CA, in 2008, the M.Sc. degree from the University of California, Los Angeles, in 2002, and the B.Sc. degree from Sharif University of Technology, Tehran, Iran, in 1999, all in electrical engineering.
He is currently a Principal Engineer at Rambus Inc., Los Altos, CA, designing next-generation high-speed memory interfaces for graphics applications. Prior to Stanford, he was with Sequoia Communications, working on the ASIC design of WCDMA systems. His main research interests include the design and implementation of communication systems, circuit design, and application of communication and signal processing techniques to the design of low-power circuits.
Dr. Amirkhany was a recipient of a Best Student Paper Award at the IEEE Global Communications Conference in 2006 for his work on the design and analysis of an analog multi-tone system for chip-to-chip interconnects.View more
University of Minnesota, Twin-Cities, Minneapolis, MN, USA
Ramesh Harjani (S'87–M'89–SM'00–F'05) received the Ph.D. degree from Carnegie Mellon University, Pittsburgh, PA, in 1989, the M.S. degree from the Indian Institute of Technology, New Delhi, in 1984, and the B.S. degree from the Birla Institute of Technology and Science, Pilani, in 1982, all in electrical engineering.
He is a Professor in the Department of Electrical and Computer Engineering and a Member of the graduate faculty of the Department of Biomedical Engineering at the University of Minnesota, Minneapolis. Prior to joining the University of Minnesota, he was with Mentor Graphics Corporation, San Jose, California. He co-founded Bermai, Inc., a startup company developing CMOS chips for wireless multimedia applications in 2001. He has been a visiting Professor at Lucent Bell Labs, Allentown, PA, and the Army Research Labs, Adelphi, MD. His research interests include analog/RF circuits for wired and wireless communications.
Dr. Harjani received the National Science Foundation Research Initiation Award in 1991. He has been a pioneer in the analog circuit synthesis community and received Best Paper Awards at the 1987 IEEE/ACM Design Automation Conference, the 1989 International Conference on Computer-Aided Design, the 1998 GOMAC and the 2007 TECHCON. His research group was the winner of the SRC Copper Design Challenge in 2000 and the winner of the SRC SiGe challenge in 2003. He is a coauthor of the books, Design of Modulators for Oversampled Converters (Kluwer, 1998), Design of High-Performance CMOS Voltage-Controlled Oscillators, (Kluwer, 2002), and High-Linearity CMOS RF Frontend Circuits (Springer 2004), and the Editor for the book Design of High-Speed Communications Circuits (World Scientific, 2006). He was an Associate Editor for IEEE Transactions on Circuits and Systems II, Analog and Digital Signal Processing from 1995 to 1997 and a Guest Editor for the International Journal of High-Speed Electronics and Systems and Analog Integrated Circuits and Signal Processing in 2004, and a Guest Editor for the IEEE Journal of Solid-State Circuits in 2010. He was the Chair of the IEEE Circuits and Systems Society technical committee on Analog Signal Processing from 1999 to 2000 and a Distinguished Lecturer of the IEEE Circuits and Systems Society for 2001–2002.
Ramesh Harjani (S'87–M'89–SM'00–F'05) received the Ph.D. degree from Carnegie Mellon University, Pittsburgh, PA, in 1989, the M.S. degree from the Indian Institute of Technology, New Delhi, in 1984, and the B.S. degree from the Birla Institute of Technology and Science, Pilani, in 1982, all in electrical engineering.
He is a Professor in the Department of Electrical and Computer Engineering and a Member of the graduate faculty of the Department of Biomedical Engineering at the University of Minnesota, Minneapolis. Prior to joining the University of Minnesota, he was with Mentor Graphics Corporation, San Jose, California. He co-founded Bermai, Inc., a startup company developing CMOS chips for wireless multimedia applications in 2001. He has been a visiting Professor at Lucent Bell Labs, Allentown, PA, and the Army Research Labs, Adelphi, MD. His research interests include analog/RF circuits for wired and wireless communications.
Dr. Harjani received the National Science Foundation Research Initiation Award in 1991. He has been a pioneer in the analog circuit synthesis community and received Best Paper Awards at the 1987 IEEE/ACM Design Automation Conference, the 1989 International Conference on Computer-Aided Design, the 1998 GOMAC and the 2007 TECHCON. His research group was the winner of the SRC Copper Design Challenge in 2000 and the winner of the SRC SiGe challenge in 2003. He is a coauthor of the books, Design of Modulators for Oversampled Converters (Kluwer, 1998), Design of High-Performance CMOS Voltage-Controlled Oscillators, (Kluwer, 2002), and High-Linearity CMOS RF Frontend Circuits (Springer 2004), and the Editor for the book Design of High-Speed Communications Circuits (World Scientific, 2006). He was an Associate Editor for IEEE Transactions on Circuits and Systems II, Analog and Digital Signal Processing from 1995 to 1997 and a Guest Editor for the International Journal of High-Speed Electronics and Systems and Analog Integrated Circuits and Signal Processing in 2004, and a Guest Editor for the IEEE Journal of Solid-State Circuits in 2010. He was the Chair of the IEEE Circuits and Systems Society technical committee on Analog Signal Processing from 1999 to 2000 and a Distinguished Lecturer of the IEEE Circuits and Systems Society for 2001–2002.View more
