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Karl D. Swartzel Jr.

1907 – 1998

Inventor of the operational amplifier

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About Karl D. Swartzel Jr.

Lived 1907 – 1998 (aged 90). Karl D. Swartzel Jr. was an inventor.

Karl Dale Swartzel Jr. (June 19, 1907 – April 23, 1998) was the inventor of the operational amplifier (or 'opamp'). He filed the patent for the 'summing amplifier' in 1941 when working at Bell Labs.

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Important facts

Born

19 June 1907

Birth century

20th century

Died

23 April 1998

Occupation

Inventor

Contemporaries

People whose lives overlapped Karl D. Swartzel Jr.'s

George Andrew Reisner

Frequently asked questions

Who was Karl D. Swartzel Jr.?

inventor of the operational amplifier

When was Karl D. Swartzel Jr. born?

Karl D. Swartzel Jr. was born on 19 June 1907.

When did Karl D. Swartzel Jr. die?

Karl D. Swartzel Jr. died on 23 April 1998.

What was Karl D. Swartzel Jr.'s occupation?

Karl D. Swartzel Jr. was an inventor.

Sources & further reading

· Wikipedia: Karl D. Swartzel Jr.

· Wikidata: Q29526332

· DBpedia: Karl D. Swartzel Jr.

Cite this page

APA: Biography.guide. (2026). Karl D. Swartzel Jr.. https://biography.guide/karl-d-swartzel-jr/

MLA: "Karl D. Swartzel Jr.." Biography.guide, https://biography.guide/karl-d-swartzel-jr/.

Chicago: "Karl D. Swartzel Jr.." Biography.guide. https://biography.guide/karl-d-swartzel-jr/.

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