Walter Schottky - encyclopedia article about Walter Schottky.

Walter Hermann Schottky (July 23, 1886, Zürich, Switzerland – March 4, 1976, Pretzfeld, West Germany) was a German physicist who invented the screen-grid vacuum tube in 1915 and the tetrode in 1919 while working at Siemens. In 1938, Schottky formulated a theory predicting the Schottky effect, now used in Schottky diodes.

He was awarded the Royal Society's Hughes medal in 1936 for his discovery of the Schrot effect (spontaneous current variations in high-vacuum discharge tubes, called by him the "Schrot effect": literally, the "small shot effect") in thermionic emission and his invention of the screen-grid tetrode and a superheterodyne method of receiving wireless signals.

In 1964 he received the Werner-von-Siemens-Ring honoring his ground-breaking work on the physical understanding of many phenomenon that led to many important technical appliances, among them tube amplifiers and semiconductors.

Note: The invention of superheterodyne is usually attributed to Edwin Armstrong. However, Schottky published an article in Proc. IRE that he had also invented something similar.

1939: first PN junction

His father was mathematician Friedrich Hermann Schottky (1851–1935).

External links

Biography of Walter H. Schottky

July 23 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

Events

1632 - 300 colonists bound for New France depart Dieppe, France.

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1850s 1860s 1870s - 1880s - 1890s 1900s 1910s
1883 1884 1885 - 1886 - 1887 1888 1889

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Subjects: Archaeology - Architecture -
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Zürich (German: (help info ) [ˈtsyːʁɪç], Zürich German: Züri
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Motto
Unus pro omnibus, omnes pro uno (Latin) (traditional)^[1]
"One for all, all for one"
Anthem
"Swiss Psalm"
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March 4 was Inauguration Day for the President of the United States. Beginning in 1937, Inauguration Day has been January 20.

Events

51 - Nero, later to become Roman Emperor, is given the title princeps iuventutis (head of the youth).

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19th century - 20th century - 21st century
1940s 1950s 1960s - 1970s - 1980s 1990s 2000s
1973 1974 1975 - 1976 - 1977 1978 1979

Year 1976 (MCMLXXVI
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Pretzfeld is a town in the district of Forchheim in Bavaria in Germany.

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West Germany (in German Westdeutschland) was the common English name for the Federal Republic of Germany, or FRG (in German Bundesrepublik Deutschland or BRD
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Anthem
"Das Lied der Deutschen" (third stanza)
also called "Einigkeit und Recht und Freiheit"
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The screen grid is a grid introduced into a thermionic valve or tube to greatly reduce the capacitance between two other parts of the electrode structure.

In its simplest form, a screen grid is placed between the control grid and anode or plate of a triode valve.
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vacuum tube, electron tube (inside North America), thermionic valve, or just valve (elsewhere); is a device used to amplify, switch, otherwise modify, or create an electrical signal by controlling the movement of electrons in a low-pressure space, often not
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19th century - 20th century - 21st century
1880s 1890s 1900s - 1910s - 1920s 1930s 1940s
1912 1913 1914 - 1915 - 1916 1917 1918

Year 1915 (MCMXV
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tetrode is an electronic device having four active electrodes. The term most commonly applies to a two-grid vacuum tube. It has four electrodes instead of three, as in the case of a triode.

Grids

The first grid of a tetrode, i.e.
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1916 1917 1918 - 1919 - 1920 1921 1922

Year 1919 (MCMXIX
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19th century - 20th century - 21st century
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1935 1936 1937 - 1938 - 1939 1940 1941

Year 1938 (MCMXXXVIII
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The Schottky diode (named after German physicist Walter H. Schottky; also known as hot carrier diode) is a semiconductor diode with a low forward voltage drop and a very fast switching action.
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Royal Society of London for the Improvement of Natural Knowledge, known simply as The Royal Society, is a learned society for science that was founded in 1660 and claims to be the oldest such society still in existence.
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The Hughes Medal, named after microphone inventor David Edward Hughes, is one of several medals awarded by the Royal Society, England's reigning academy of science.
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19th century - 20th century - 21st century
1900s 1910s 1920s - 1930s - 1940s 1950s 1960s
1933 1934 1935 - 1936 - 1937 1938 1939

Year 1936 (MCMXXXVI
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Thermionic emission (archaically known as the Edison effect) is the flow of charged particles called thermions from a charged metal or a charged metal oxide surface, caused by thermal vibrational energy overcoming the electrostatic forces holding electrons to the
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In electronics, the superheterodyne receiver (also known by its full name, the supersonic heterodyne receiver, or by the abbreviated form superhet) is a technique for selectively recovering the information from radio waves of a particular frequency.
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19th century - 20th century - 21st century
1930s 1940s 1950s - 1960s - 1970s 1980s 1990s
1961 1962 1963 - 1964 - 1965 1966 1967

Also Nintendo emulator: 1964 (emulator).

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The Werner-von-Siemens-Ring is considered to be among the highest ranking awards for technical sciences in Germany. It has been awarded from 1916 to 1941 and since 1952 about every three years by the foundation Stiftung Werner-von-Siemens-Ring.
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valve amplifier (UK and Aus.) or tube amplifier (U.S.), is a device for electrically amplifying the power of an electrical signal , typically (but not exclusively) sound or radio frequency signals.
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A semiconductor is a solid that has electrical conductivity in between that of a conductor and that of an insulator, and can be controlled over a wide range, either permanently or dynamically.^[1] Semiconductors are tremendously important in technology.
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Edwin Howard Armstrong (December 18, 1890 – January 31, 1954) was an American electrical engineer and inventor. Armstrong was the inventor of the FM radio.

Birth and education

Edwin Howard Armstrong was born in Chelsea, New York, in 1890.
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19th century - 20th century - 21st century
1900s 1910s 1920s - 1930s - 1940s 1950s 1960s
1936 1937 1938 - 1939 - 1940 1941 1942

Year 1939 (MCMXXXIX
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A p-n junction is formed by combining P-type and N-type semiconductors together in very close contact. The term junction refers to the region where the two types of semiconductor meet.
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Walter H. Schottky (redirected from Walter Schottky)

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Events

Events

Grids

Birth and education

Walter H. Schottky
(redirected from Walter Schottky)