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Hung-Chang Lin

Hung Chang Lin (Jimmy Lin) (Chinese: 凌宏璋; pinyin: Líng Hóngzhāng; Wade–Giles: Ling Hung-chang; August 8, 1919 – March 5, 2009) was a Chinese-American inventor and a professor of Electrical Engineering at the University of Maryland.

Hung C. Lin held 61 U.S. patents. Among his inventions is the quasi-complementary (transistor) amplifier circuit,[1] which has been used in many commercial audio amplifiers. Another of his inventions is the lateral transistor which is used in linear integrated circuits and T2L digital integrated circuits. He also invented the wireless microphone.

He has published more than 170 professional papers mostly on transistors and integrated circuits.

In 1941 he received the B.S. in Electrical Engineering from Shanghai Jiaotong University, China. In 1948 he received the M.S. degree from the University of Michigan. In 1956 he received the Doctor of Electrical Engineering from the Polytechnic Institute of Brooklyn. In 1978 he was presented with the J J Ebers Award from the IEEE. In 2000 he was elected to be academician of Academia Sinica.


  1. ^ us 2896029  "Semiconductor Amplifier Circuits" issued 21 July 1959 to Hung Chang Lin, assignor to Radio Corporation of America (filed 3 May 1955)