Emanuels Grīnbergs

While there, he defended a thesis in geometry at the University of Latvia in 1943, entitled On Oscillations, Superoscillations and Characteristic Points.

[1][3][4][7] In the meantime, the Soviet Union had annexed Latvia in 1940, and the army of Nazi Germany had occupied it and incorporated it into the Reichskommissariat Ostland.

In 1956, he joined the Institute of Physics of the Latvian Academy of Sciences, and in 1960, he began working at the Computer Center of the University of Latvia, where he remained for the rest of his career, eventually becoming Chief Scientist there.

[4] Grinbergs and his collaborators wrote many papers on the design of electrical circuits and electronic filters, stemming from his radio work.

He earned the State Prize of the Latvian SSR in 1980 for his research on nonlinear electronic circuit theory.