Leon Ong Chua (; ; born June 28, 1936) is an American
electrical engineer
Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems which use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the l ...
and
computer scientist
A computer scientist is a person who is trained in the academic study of computer science.
Computer scientists typically work on the theoretical side of computation, as opposed to the hardware side on which computer engineers mainly focus (al ...
. 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 land-grant research university in Berkeley, California. Established in 1868 as the University of California, it is the state's first land-grant u ...
, which he joined in 1971. He has contributed to
nonlinear
In mathematics and science, a nonlinear system is a system in which the change of the output is not proportional to the change of the input. Nonlinear problems are of interest to engineers, biologists, physicists, mathematicians, and many other ...
circuit theory
Circuit may refer to:
Science and technology
Electrical engineering
* Electrical circuit, a complete electrical network with a closed-loop giving a return path for current
** Analog circuit, uses continuous signal levels
** Balanced circui ...
and
cellular neural network
In computer science and machine learning, cellular neural networks (CNN) or cellular nonlinear networks (CNN) are a parallel computing paradigm similar to neural networks, with the difference that communication is allowed between neighbouring units ...
theory.
He is the inventor and namesake of
Chua's circuit
Chua's circuit (also known as a Chua circuit) is a simple electronic circuit that exhibits classic chaotic behavior. This means roughly that it is a "nonperiodic oscillator"; it produces an oscillating waveform that, unlike an ordinary electronic ...
one of the first and most widely known circuits to exhibit
chaotic
Chaotic was originally a Danish trading card game. It expanded to an online game in America which then became a television program based on the game. The program was able to be seen on 4Kids TV (Fox affiliates, nationwide), Jetix, The CW4Kid ...
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 fu ...
. 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
The Hewlett-Packard Company, commonly shortened to Hewlett-Packard ( ) or HP, was an American multinational information technology company headquartered in Palo Alto, California. HP developed and provided a wide variety of hardware components ...
.
["'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
In computer science and machine learning, cellular neural networks (CNN) or cellular nonlinear networks (CNN) are a parallel computing paradigm similar to neural networks, with the difference that communication is allowed between neighbouring units ...
(CNN) processor in the world.
Early life and education
A first-generation Filipino-Chinese-American, Chua and his twin sister grew up as members of the
Hokkien
The Hokkien () variety of Chinese is a Southern Min language native to and originating from the Minnan region, where it is widely spoken in the south-eastern part of Fujian in southeastern mainland China. It is one of the national languages in ...
Chinese ethnic minority in the
Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
["] under the reign of the
Empire of Japan
The also known as the Japanese Empire or Imperial Japan, was a historical nation-state and great power that existed from the Meiji Restoration in 1868 until the enactment of the post-World War II 1947 constitution and subsequent fo ...
during
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
. Of
Hoklo
The Hoklo people or Hokkien people () are a Han Chinese (also Han Taiwanese) subgroup who speak Hokkien, a Southern Min language, or trace their ancestry to Southeastern Fujian, China and known by various endonyms or other related terms such a ...
ancestry, his parents immigrated from
Jinjiang,
Southern Fujian
Minnan, Banlam or Minnan Golden Triangle (), refers to the coastal region in Southern Fujian Province, China, which includes the prefecture-level cities of Xiamen, Quanzhou and Zhangzhou. The region accounts for 40 percent of the GDP of Fujian Pro ...
province.
In 1959, he earned his BSEE degree from
Mapúa Institute of Technology in
Manila
Manila ( , ; fil, Maynila, ), officially the City of Manila ( fil, Lungsod ng Maynila, ), is the capital of the Philippines, and its second-most populous city. It is highly urbanized and, as of 2019, was the world's most densely populate ...
, Philippines. He briefly taught at Mapúa for a year,
["] before emigrating to the
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...
on a scholarship to the
Massachusetts Institute of Technology
The Massachusetts Institute of Technology (MIT) is a private land-grant research university in Cambridge, Massachusetts. Established in 1861, MIT has played a key role in the development of modern technology and science, and is one of the ...
, where he earned an MSEE degree in 1961. He then earned a
Ph.D
A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin: or ') is the most common Academic degree, degree at the highest academic level awarded following a course of study. PhDs are awarded for programs across the whole breadth of academic fields ...
from the
University of Illinois, Urbana-Champaign
The University of Illinois Urbana-Champaign (U of I, Illinois, University of Illinois, or UIUC) is a public land-grant research university in Illinois in the twin cities of Champaign and Urbana. It is the flagship institution of the Universi ...
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
Amy Lynn Chua (born October 26, 1962), also known as "the Tiger Mom", is an American lawyer, legal scholar, and writer. She is the John M. Duff Jr. Professor of Law at Yale Law School with an expertise in international business transactions, law ...
(a professor of law at
Yale University
Yale University is a private research university in New Haven, Connecticut. Established in 1701 as the Collegiate School, it is the third-oldest institution of higher education in the United States and among the most prestigious in the wo ...
), Michelle, Katrin (a Professor of Medicine at
Stanford University
Stanford University, officially Leland Stanford Junior University, is a private research university in Stanford, California. The campus occupies , among the largest in the United States, and enrolls over 17,000 students. Stanford is consider ...
), and Cynthia (Cindy, a Special
Olympics Gold medalist). 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 land-grant research university in West Lafayette, Indiana, and the flagship campus of the Purdue University system. The university was founded in 1869 after Lafayette businessman John Purdue donated land and money ...
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
In mathematics and science, a nonlinear system is a system in which the change of the output is not proportional to the change of the input. Nonlinear problems are of interest to engineers, biologists, physicists, mathematicians, and many other ...
,
bifurcation theory
Bifurcation theory is the 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 equations. Mo ...
, and
chaos theory
Chaos theory is an interdisciplinary area of scientific study and branch of mathematics focused on underlying patterns and deterministic laws of dynamical systems that are highly sensitive to initial conditions, and were once thought to have co ...
. 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
An honorary degree is an academic degree for which a university (or other degree-awarding institution) has waived all of the usual requirements. It is also known by the Latin phrases ''honoris causa'' ("for the sake of the honour") or ''ad hon ...
'' from the
École Polytechnique Fédérale de Lausanne
École may refer to:
* an elementary school in the French educational stages normally followed by secondary education establishments (collège and lycée)
* École (river), a tributary of the Seine flowing in région Île-de-France
* École, Savoi ...
,
Switzerland
). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
(1983)
*Honorary Doctorate from the
University of Tokushima
is a national university in the city of Tokushima, Japan, with seven graduate schools and five undergraduate faculties. The university was founded in 1949, by merging six national education facilities into one. The 2014 Nobel Prize Laureate in P ...
,
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
(1984)
*Honorary Doctorate from the
Technische Universität Dresden
TU Dresden (for german: Technische Universität Dresden, abbreviated as TUD and often wrongly translated as "Dresden University of Technology") is a public research university, the largest institute of higher education in the city of Dresden, th ...
,
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
(1992)
*''Doctor Honoris Causa'' from the
Technical University of Budapest
Technical may refer to:
* Technical (vehicle), an improvised fighting vehicle
* Technical analysis, a discipline for forecasting the future direction of prices through the study of past market data
* Technical drawing, showing how something is co ...
,
Hungary
Hungary ( hu, Magyarország ) is a landlocked country in Central Europe. Spanning of the 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 a ...
(1994)
*''Doctor Honoris Causa'' from the
University of Santiago de Compostela
, established =
, type = Public
, budget = €228 million (2011)
, rector = Prof. Dr. Antonio López DÃaz
, city = Santiago de Compostela
, state = Galicia
, country = Spain
, undergrad = 23,835
, postgrad = 1,716
, doctoral = 2,697
...
,
Spain
, image_flag = Bandera de España.svg
, image_coat = Escudo de España (mazonado).svg
, national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond")
, national_anthem = (English: "Royal March")
, i ...
(1995)
*''Doctor Honoris Causa'' from the
Goethe University Frankfurt
Goethe University (german: link=no, Johann Wolfgang Goethe-Universität Frankfurt am Main) is a 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 wealt ...
,
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
(1996)
*''Doctor Honoris Causa'' from the
Gheorghe Asachi Technical University of IaÅŸi Gheorghe is a Romanian given name and surname. It is a variant of George, also a name in Romanian but with soft Gs. It may refer to:
Given name
* Gheorghe Adamescu
* Gheorghe Albu
* Gheorghe Alexandrescu
* Gheorghe Andriev
* Gheorghe Apostol
* ...
,
Romania
Romania ( ; ro, România ) is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern, and Southeast Europe, Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, S ...
(1997)
*''Doctor Honoris Causa'' from the
University of Catania
The University of Catania ( it, Università degli Studi di Catania) is a university located in Catania, Sicily. Founded in 1434, it is the oldest university in Sicily, the 13th oldest in Italy, and the 29th oldest university in the world. With a ...
,
Italy
Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...
(2000)
*''Doctor Honoris Causa'' from the
AGH University of Science and Technology
AGH University of Science and Technology in Kraków, (abbreviated as ''AGH UST'') is a public university in Kraków, Poland. Founded in 1913, its inauguration took place in 1919. The university focuses on innovation, innovative technologies, its ...
,
Poland
Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populous ...
(2003)
*''Doctor Honoris Causa'' from the
University of Le Havre
Le Havre Normandy University ( French: Université Le Havre Normandie) is a French university located in Le Havre. Along with five other schools, Le Havre Normandy University is a member of Normandy University, an association of universities and h ...
,
France
France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...
(2009)
*''Doctor Honoris Causa'' from the
KU Leuven
KU Leuven (or Katholieke Universiteit Leuven) is a Catholic research university in the city of Leuven, Belgium. It conducts teaching, research, and services in computer science, engineering, natural sciences, theology, humanities, medicine, l ...
,
Belgium
Belgium, ; french: Belgique ; german: Belgien officially the Kingdom of Belgium, is a country in Northwestern Europe. The country is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeast, France to th ...
(2013)
*''Doctor of Science Honoris Causa'' from the
Hong Kong Polytechnic University
The Hong Kong Polytechnic University (PolyU) is a public research university located in Hung Hom, Hong Kong near Hung Hom station. The University is one of the eight government-funded degree-granting tertiary institutions in Hong Kong. Founded ...
,
Hong Kong
Hong Kong ( (US) or (UK); , ), officially the Hong Kong Special Administrative Region of the People's Republic of China ( abbr. Hong Kong SAR or HKSAR), is a city and special administrative region of China on the eastern Pearl River Delt ...
(2014)
*''Doctor Honoris Causa'' from the
Polytechnic University of Turin
The Polytechnic University of Turin ( it, Politecnico di Torino) is the oldest Italian public technical university. The university offers several courses in the fields of Engineering, Architecture, Urban Planning and Industrial Design, and is co ...
,
Italy
Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...
(2015)
*
IEEE
The Institute of Electrical and Electronics Engineers (IEEE) is a 501(c)(3) professional association for electronic engineering and electrical engineering (and associated disciplines) with its corporate office in New York City and its operation ...
Browder J. Thompson Memorial Prize Award (1967)
* IEEE Guillemin-Cauer Award (1972, 1985, 1989)
*
IEEE W.R.G. Baker Prize Paper Award
IEEE W.R.G. Baker Award provided by the Institute of Radio Engineers (IRE), was created in 1956 from a donation from Walter R. G. Baker (1892–1960) to the IRE. The award continued to be awarded by the board of directors of the Institute of El ...
(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
The IEEE Gustav Robert Kirchhoff Award is a Technical Field Award established by the IEEE Board of Directors in 2003. This award is presented for outstanding contributions to the fundamentals of any aspect of electronic circuits and systems th ...
(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
The Institute of Electrical and Electronics Engineers (IEEE) is a 501(c)(3) professional association for electronic engineering and electrical engineering (and associated disciplines) with its corporate office in New York City and its operati ...
Vitold Belevitch
Vitold Belevitch (2 March 1921 – 26 December 1999) was a Belgian mathematician and electrical engineer of Russian origin who produced some important work in the field of electrical network theory. Born to parents fleeing the Bolsheviks, he ...
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
A cellular automaton (pl. cellular automata, abbrev. CA) is a discrete model of computation studied in automata theory. Cellular automata are also called cellular spaces, tessellation automata, homogeneous structures, cellular structures, tessel ...
.''
*
2010 Guggenheim Fellowship
References
External links
*
{{DEFAULTSORT:Chua, Leon O.
1936 births
Living people
American computer scientists
American electrical engineers
American people of Chinese descent
Chaos theorists
Fellow Members 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
University of Illinois Urbana-Champaign alumni
Electrical engineering academics