Abstract:
This paper for the first time presents an analytical approach for estimating maximum achievable oscillators' frequency in a specific CMOS process independent of their top...Show MoreMetadata
Abstract:
This paper for the first time presents an analytical approach for estimating maximum achievable oscillators' frequency in a specific CMOS process independent of their topology. By employing the Mason function in the first place, it has been proven that ring oscillator with an inductive load can achieve higher oscillation frequencies compared to the other topologies. Then, by applying two-port analysis at the oscillation edge, the oscillation frequency as a function of circuit variables like passive network topology, number of stages, elements of the passive network, gain, and the phase difference between two ports can be achieved. In order to evaluate the maximum oscillation frequency, maximized frequency is applied to the space of variables. This analysis proposes a systematic procedure for designing an oscillator with maximum frequency in desired CMOS process for a known quality factor of passive elements. To examine the feasibility of the proposed technique, this methodology is applied to an optimal oscillator structure. The simulation results confirm that maximum achievable oscillator frequency is 20%-30% higher compared to the oscillator designed with conventional approach. The simulations are performed in the 0.18-μm TSMC technology.
Published in: IEEE Transactions on Very Large Scale Integration (VLSI) Systems ( Volume: 27, Issue: 3, March 2019)

Department of Electrical and Computer Engineering, Islamic Azad University, Tehran, Iran
Amard Afzalian was born in Amol, Iran, in 1982. He received the B.Sc. degree in electrical engineering from the Faculty of Technology and Engineering, Mazandaran University, Babol, Iran, in 2003, and the M.Sc. degree from the Science and Research Branch, Islamic Azad University, Tehran, Iran, in 2010, where he is currently working toward the Ph.D. degree in electronic engineering.
Since 2013, he has been a Faculty Member w...Show More
Amard Afzalian was born in Amol, Iran, in 1982. He received the B.Sc. degree in electrical engineering from the Faculty of Technology and Engineering, Mazandaran University, Babol, Iran, in 2003, and the M.Sc. degree from the Science and Research Branch, Islamic Azad University, Tehran, Iran, in 2010, where he is currently working toward the Ph.D. degree in electronic engineering.
Since 2013, he has been a Faculty Member w...View more

Department of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Iran
Hossein Miar-Naimi was born in Chalus, Iran, in 1972. He received the B.Sc. degree in electrical engineering from the Sharif University of Technology, Tehran, Iran, in 1994, the M.Sc. degree in electrical engineering from Tarbiat Modares University, Tehran, in 1996, and the Ph.D. degree in electrical engineering from the Iran University of Science and Technology, Tehran, in 2002.
In 2003, he joined the Electrical and Compu...Show More
Hossein Miar-Naimi was born in Chalus, Iran, in 1972. He received the B.Sc. degree in electrical engineering from the Sharif University of Technology, Tehran, Iran, in 1994, the M.Sc. degree in electrical engineering from Tarbiat Modares University, Tehran, in 1996, and the Ph.D. degree in electrical engineering from the Iran University of Science and Technology, Tehran, in 2002.
In 2003, he joined the Electrical and Compu...View more

Department of Electrical and Computer Engineering, Islamic Azad University, Tehran, Iran
Massoud Dousti received the B.S. degree in electrical engineering from Orleans University, Orleans, France, in 1991, the M.S. degree in electronics (microwave and optics) from Limoges University, Limoges, France, in 1994, and the Ph.D. degree in electronics (active microwave circuits) from the University of Paris VI, Pierre et Marie Currie, Paris, France, in 1999.
He was a Teaching Assistant with the Department of Electric...Show More
Massoud Dousti received the B.S. degree in electrical engineering from Orleans University, Orleans, France, in 1991, the M.S. degree in electronics (microwave and optics) from Limoges University, Limoges, France, in 1994, and the Ph.D. degree in electronics (active microwave circuits) from the University of Paris VI, Pierre et Marie Currie, Paris, France, in 1999.
He was a Teaching Assistant with the Department of Electric...View more

Department of Electrical and Computer Engineering, Islamic Azad University, Tehran, Iran
Amard Afzalian was born in Amol, Iran, in 1982. He received the B.Sc. degree in electrical engineering from the Faculty of Technology and Engineering, Mazandaran University, Babol, Iran, in 2003, and the M.Sc. degree from the Science and Research Branch, Islamic Azad University, Tehran, Iran, in 2010, where he is currently working toward the Ph.D. degree in electronic engineering.
Since 2013, he has been a Faculty Member with Islamic Azad University, Ramsar Branch, Ramsar, Iran. His current research interests include analog integrated circuits design and high-frequency oscillator analysis.
Amard Afzalian was born in Amol, Iran, in 1982. He received the B.Sc. degree in electrical engineering from the Faculty of Technology and Engineering, Mazandaran University, Babol, Iran, in 2003, and the M.Sc. degree from the Science and Research Branch, Islamic Azad University, Tehran, Iran, in 2010, where he is currently working toward the Ph.D. degree in electronic engineering.
Since 2013, he has been a Faculty Member with Islamic Azad University, Ramsar Branch, Ramsar, Iran. His current research interests include analog integrated circuits design and high-frequency oscillator analysis.View more

Department of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Iran
Hossein Miar-Naimi was born in Chalus, Iran, in 1972. He received the B.Sc. degree in electrical engineering from the Sharif University of Technology, Tehran, Iran, in 1994, the M.Sc. degree in electrical engineering from Tarbiat Modares University, Tehran, in 1996, and the Ph.D. degree in electrical engineering from the Iran University of Science and Technology, Tehran, in 2002.
In 2003, he joined the Electrical and Computer Engineering Faculty, Babol Noshirvani University of Technology, Babol, Iran, where he was promoted to an Associate Professor in 2009 and then a Full Professor in 2014. Since 2007, he has been the Dean of the Electrical and Computer Engineering Faculty. His current research interests include analog CMOS integrated circuit design, and radio frequency and microwave microelectronics.
Hossein Miar-Naimi was born in Chalus, Iran, in 1972. He received the B.Sc. degree in electrical engineering from the Sharif University of Technology, Tehran, Iran, in 1994, the M.Sc. degree in electrical engineering from Tarbiat Modares University, Tehran, in 1996, and the Ph.D. degree in electrical engineering from the Iran University of Science and Technology, Tehran, in 2002.
In 2003, he joined the Electrical and Computer Engineering Faculty, Babol Noshirvani University of Technology, Babol, Iran, where he was promoted to an Associate Professor in 2009 and then a Full Professor in 2014. Since 2007, he has been the Dean of the Electrical and Computer Engineering Faculty. His current research interests include analog CMOS integrated circuit design, and radio frequency and microwave microelectronics.View more

Department of Electrical and Computer Engineering, Islamic Azad University, Tehran, Iran
Massoud Dousti received the B.S. degree in electrical engineering from Orleans University, Orleans, France, in 1991, the M.S. degree in electronics (microwave and optics) from Limoges University, Limoges, France, in 1994, and the Ph.D. degree in electronics (active microwave circuits) from the University of Paris VI, Pierre et Marie Currie, Paris, France, in 1999.
He was a Teaching Assistant with the Department of Electrical Engineering, Ensea, Cergy Pontoise, France, from 1998 to 2000. In 2001, he joined the Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran, where he is currently an Associate Professor. His current research interests include linear and nonlinear microwave/radio frequency circuits and systems design, millimeter-wave circuit’s design, and MMIC technology.
Massoud Dousti received the B.S. degree in electrical engineering from Orleans University, Orleans, France, in 1991, the M.S. degree in electronics (microwave and optics) from Limoges University, Limoges, France, in 1994, and the Ph.D. degree in electronics (active microwave circuits) from the University of Paris VI, Pierre et Marie Currie, Paris, France, in 1999.
He was a Teaching Assistant with the Department of Electrical Engineering, Ensea, Cergy Pontoise, France, from 1998 to 2000. In 2001, he joined the Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran, where he is currently an Associate Professor. His current research interests include linear and nonlinear microwave/radio frequency circuits and systems design, millimeter-wave circuit’s design, and MMIC technology.View more