Leon Ong Chua (; ; born June 28, 1936) is a Filipino-American
electrical engineer
Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems that use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the l ...
and
computer scientist
A computer scientist is a scientist who specializes in the academic study of computer science.
Computer scientists typically work on the theoretical side of computation. Although computer scientists can also focus their work and research on ...
. He is a professor in the electrical engineering and computer sciences department at the
University of California, Berkeley
The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California), is a Public university, public Land-grant university, land-grant research university in Berkeley, California, United States. Founded in 1868 and named after t ...
, which he joined in 1971. He has contributed to
nonlinear circuit theory and
cellular neural network theory and is recognized as the "Father of Nonlinear Circuit Theory" or electronic devices from nonlinear components.
He is the inventor and namesake of
Chua's circuit one of the first and most widely known circuits to exhibit
chaotic behavior, and was the first to conceive the theories behind, and postulate the existence of, the
memristor
A memristor (; a portmanteau of ''memory resistor'') is a non-linear two-terminal electrical component relating electric charge and magnetic flux linkage. It was described and named in 1971 by Leon Chua, completing a theoretical quartet of ...
. Thirty-seven years after he predicted its existence, a working solid-state memristor was created by a team led by
R. Stanley Williams at
Hewlett Packard.
["'Without Chua's circuit equations, you can't make use of this device,' says Williams. " ]
Alongside
Tamas Roska, Chua also introduced the first algorithmically programmable analog
cellular neural network (CNN) processor.
Early life and education
A first-generation Filipino-Chinese-American, Chua and his twin sister grew up as members of the
Hokkien
Hokkien ( , ) is a Varieties of Chinese, variety of the Southern Min group of Chinese language, Chinese languages. Native to and originating from the Minnan region in the southeastern part of Fujian in southeastern China, it is also referred ...
Chinese ethnic minority in the
Philippines
The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...
["] under the reign of the
Empire of Japan
The Empire of Japan, also known as the Japanese Empire or Imperial Japan, was the Japanese nation state that existed from the Meiji Restoration on January 3, 1868, until the Constitution of Japan took effect on May 3, 1947. From Japan–Kor ...
during
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
. Of
Hoklo ancestry, his parents immigrated from
Jinjiang,
Southern Fujian province.
In 1959, he earned his BSEE degree from
Mapúa Institute of Technology in
Manila
Manila, officially the City of Manila, is the Capital of the Philippines, capital and second-most populous city of the Philippines after Quezon City, with a population of 1,846,513 people in 2020. Located on the eastern shore of Manila Bay on ...
, Philippines. He briefly taught at Mapúa for a year,
["] before emigrating to the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
on a scholarship to the
Massachusetts Institute of Technology
The Massachusetts Institute of Technology (MIT) is a Private university, private research university in Cambridge, Massachusetts, United States. Established in 1861, MIT has played a significant role in the development of many areas of moder ...
, where he earned an MSEE degree in 1961. He then earned a
Ph.D. from the
University of Illinois, Urbana-Champaign in 1964. His PhD thesis was entitled ''Nonlinear Network Analysis—The Parametric Approach.'' Over the ensuing years, he has received eight honorary doctorates.
Chua has four daughters; the eldest,
Amy Chua (a professor of law at
Yale University
Yale University is a Private university, private Ivy League research university in New Haven, Connecticut, United States. Founded in 1701, Yale is the List of Colonial Colleges, third-oldest institution of higher education in the United Stat ...
), Katrin (a Professor of Medicine at
Stanford University
Leland Stanford Junior University, commonly referred to as Stanford University, is a Private university, private research university in Stanford, California, United States. It was founded in 1885 by railroad magnate Leland Stanford (the eighth ...
), Cynthia (Cindy, a
Special Olympics gold medalist), and Michelle (a Yale Law School graduate). In addition to his four daughters, Chua has seven grandchildren.
Career
Chua was a member of the faculty at
Purdue University
Purdue University is a Public university#United States, public Land-grant university, land-grant research university in West Lafayette, Indiana, United States, and the flagship campus of the Purdue University system. The university was founded ...
from 1964 to 1970 before joining Berkeley in 1971. His current research interests include
cellular neural networks, nonlinear networks, nonlinear circuits and systems,
nonlinear dynamics,
bifurcation theory
Bifurcation theory is the Mathematics, mathematical study of changes in the qualitative or topological structure of a given family of curves, such as the integral curves of a family of vector fields, and the solutions of a family of differential e ...
, and
chaos theory
Chaos theory is an interdisciplinary area of Scientific method, scientific study and branch of mathematics. It focuses on underlying patterns and Deterministic system, deterministic Scientific law, laws of dynamical systems that are highly sens ...
. He was the editor of ''The International Journal of Bifurcation and Chaos'' until 2009, and is now the honorary editor.
Awards and honors
* Member of the Academy of Europe, http://www.ae-info.org/ae/User/Chua_Leon
*''
Doctor Honoris Causa'' from the
École Polytechnique Fédérale de Lausanne,
Switzerland
Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...
(1983)
*Honorary doctorate from the
University of Tokushima,
Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
(1984)
*Honorary doctorate from the
Technische Universität Dresden,
Germany
Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
(1992)
*''Doctor Honoris Causa'' from the
Technical University of Budapest,
Hungary
Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...
(1994)
*''Doctor Honoris Causa'' from the
University of Santiago de Compostela,
Spain
Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...
(1995)
*''Doctor Honoris Causa'' from the
Goethe University Frankfurt
Goethe University Frankfurt () is a public research university located in Frankfurt am Main, Germany. It was founded in 1914 as a citizens' university, which means it was founded and funded by the wealthy and active liberal citizenry of Frankfurt ...
,
Germany
Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
(1996)
*''Doctor Honoris Causa'' from the
Gheorghe Asachi Technical University of IaÅŸi,
Romania
Romania is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to ...
(1997)
*''Doctor Honoris Causa'' from the
University of Catania,
Italy
Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...
(2000)
*''Doctor Honoris Causa'' from the
AGH University of Science and Technology,
Poland
Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...
(2003)
*''Doctor Honoris Causa'' from the
University of Le Havre,
France
France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
(2009)
*''Doctor Honoris Causa'' from the
KU Leuven
KU Leuven (Katholieke Universiteit Leuven) is a Catholic research university in the city of Leuven, Leuven, Belgium. Founded in 1425, it is the oldest university in Belgium and the oldest university in the Low Countries.
In addition to its mai ...
,
Belgium
Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeas ...
(2013)
*''Doctor of Science Honoris Causa'' from the
Hong Kong Polytechnic University,
Hong Kong
Hong Kong)., Legally Hong Kong, China in international treaties and organizations. is a special administrative region of China. With 7.5 million residents in a territory, Hong Kong is the fourth most densely populated region in the wor ...
(2014)
*''Doctor Honoris Causa'' from the
Polytechnic University of Turin
The Polytechnic University of Turin (, abbreviated as PoliTO) is the oldest Italian Public university, public Institute of technology, technical university. The university offers several courses in the fields of Engineering, Architecture, Urban ...
,
Italy
Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...
(2015)
*
IEEE
The Institute of Electrical and Electronics Engineers (IEEE) is an American 501(c)(3) organization, 501(c)(3) public charity professional organization for electrical engineering, electronics engineering, and other related disciplines.
The IEEE ...
Browder J. Thompson Memorial Prize Award (1967)
* IEEE Guillemin-Cauer Award (1972, 1985, 1989)
*
IEEE W.R.G. Baker Prize Paper Award (1973), for the paper '' "Memristor: The Missing Circuit Element" in IEEE TRANSACTIONS on Circuit Theory, September 1971''
* IEEE Neural Networks Pioneer Award (2000)
*
IEEE Gustav Robert Kirchhoff Award (2005), ''For seminal contributions to the foundation of nonlinear circuit theory, and for inventing Chua's Circuit and Cellular Networks, each spawning a new research area.''
* M. E. Van Valkenburg Award (1995 and 1998)
*
IEEE Circuits and Systems Society Vitold Belevitch Award (2007), ''For seminal contributions to nonlinear circuit theory, the first mathematically proven physical implementation of Chaos (Chua circuit), the local activity principle as the root of complexity, the cellular neural/nonlinear network principle and basic theory, and the qualitative theory of complexity in 1D
cellular automata.''
*
2010 Guggenheim Fellowship
References
External links
*
Some of IEEE publications by Chua
{{DEFAULTSORT:Chua, Leon O.
1936 births
Living people
American computer scientists
American electrical engineers
American people of Chinese descent
Chaos theorists
Fellows of the IEEE
Filipino emigrants to the United States
Filipino people of Chinese descent
Hokkien scientists
Mapúa University alumni
Members of Academia Europaea
MIT School of Engineering alumni
Purdue University faculty
Filipino twins
American twins
UC Berkeley College of Engineering faculty
Electrical engineering academics
Grainger College of Engineering alumni