Development of the Active Network Theory in the 1950's Japan

Takeshi YANAGISAWA

Summary :

The 1950's was important period for Japanese electronic industry. It embarked in a new enterprise after the defeat of Japan in the World War. Dr. Masamitsu Kawakami of the Tokyo Institute of Technology made a great contribution to the leveling up of the people involved in electronics through his books "Denshikairo I-V". In this paper, activity of Dr. Kawakami in the field of active networks before and during the 1950's are introduced. It includes realization of negative and higher order impedances and the development of the theory of elementary active 2-ports. His works were inherited by the successors including the author. The development of a current inversion negative impedance converter, and its application to active network synthesis is reflected. The influence of these works on the research in the later age is also shown.

• Publication: IEICE TRANSACTIONS on Fundamentals Vol.E74-A No.3 pp.472-478
• Publication Date: 1991/03/25
• Type of Manuscript: INVITED PAPER

Authors

Takeshi YANAGISAWA

Keyword