Vitold Belevitch

Vitold Belevitch ( born March 2, 1921 in Terijoki, Finland, † 26 December 1999) was a Belgian mathematician and electrical engineer. He is regarded as the grandfather of circuit theory in Europe. He first described using the so-called Conference- matrix theory, the circuitry problems in a low-loss interconnection of several participants in early telephone networks in conference circuits. In connection with the theorem of Belevitch, which describes a particular type of two-ports.

Life

He was born on the run of his parents before the Bolshevik Revolution from Petrograd to Helsinki, where his grandfather was headmaster. While escaping his Russian father was arrested and deported to Siberia. After his Polish mother received no news, she emigrated in 1926 Vitold to Belgium.

Until 1936 he attended the Facultés universitaires Notre- Dame de la Paix, and then studied until 1942 electrical engineering and mechanical engineering at the Université catholique de Louvain. In 1945 he wrote his dissertation Insertion Loss and Effective phase shift in composite filter at cut-off frequency of Wilhelm Cauer and Charles man back.

In 1942 he started at the Bell Telephone Manufacturing Company ( BTMC ) in Antwerp, which was sold in 1925 to ITT. He directed the transfer department and worked with Cauer, of his time in the ITT subsidiary Mix & Genest worked. One of his employees was Alfred Fettweis. In 1951 he was involved in the design of electronic computer, they constructed the IRSIA - FNRS.

From 1953 to 1985 he taught at the University. In 1955 he became director of the Comité d' Étude et d'Exploitation of Calculateurs ELECTRONIQUES in Brussels. In 1963 he became director of the Laboratoire de Recherche ( MBLE ) (later Philips Research Laboratories, Belgium ).

Publications

  • Theory of 2n -terminal networks with application to conference telephony, Electrical Communication, Vol.27, no.3, p.240 September 1950.
  • Langage des machines et langage humain; 1956
  • Théorie des circuits de télécommunication; 1957
  • With Jacques Neirynck: rectification and frequency multiplication by rectifie rcircuits with selective termination; Ann. Soc. Scient. Bruxelles, 1957
  • Théorie des circuits non- linéaires en régime alternatif ( redresseurs, modulateurs, oscillateurs ). ; 1959
  • Classical network theory; 1963
  • Factorization of scattering matrices with applications to passive -network synthesis; 1963
  • Summary of the History of Circuit Theory; Comité d' Etude of Calculateurs Electroniques, Proceedings of the IRE, 1962
  • ' Conference matrices and Hadamard matrices; In: Ann. de la Société Scientifique de Bruxelles 82, 13-32, 1968.
  • On Stieltjes integral transforms Involving [ gamma ] -functions; 1982
Zelenogorsk, Saint Petersburg December 26 Belevitch's theorem S-Matrix Hadamard-Matrix Leon O. Chua
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