Barkhausen oscillator

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• Barkhausen stability criterion — The Barkhausen stability criterion was put forth by German physicist Heinrich Georg Barkhausen (1881 1956) for sustained oscillations and it states that: #The loop gain of the oscillator circuit must be greater than or equal to unity, that is,… …   Wikipedia

• Barkhausen, Heinrich Georg — ▪ German physicist born Dec. 2, 1881, Bremen, Ger. died Feb. 20, 1956, Dresden, E.Ger. [Germany]       German physicist who discovered the Barkhausen effect, a principle concerning changes in the magnetic properties of metal.       Barkhausen… …   Universalium

• Barkhausen , Heinrich Georg — (1881–1956) German physicist After attending the gymnasium and engineering college in his native city of Bremen, Barkhausen gained his PhD in Göttingen and in 1911 became professor of electrical engineering in Dresden. Here he formulated the… …   Scientists

• barkhausen-kurz oscillation — |ku̇rts noun or barkhausen oscillation Usage: usually capitalized B&K Etymology: after H. Barkhausen & K.Kurz, 20th century German scientists : ultrahigh frequency oscillation produced in a triode oscillator by means of a positively biased grid… …   Useful english dictionary

• Heinrich Barkhausen — Infobox Scientist name = PAGENAME box width = image size =150px caption = PAGENAME birth date = December 2,1881 birth place = Bremen death date = February 20, 1956 death place = residence = |citizenship = nationality = German ethnicity = field =… …   Wikipedia

• History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …   Wikipedia

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• Hysteresis — Not to be confused with Hysteria. Fig. 1. Electric displacement field D of a ferroelectric material as the electric field E is first decreased, then increased. The curves form a hysteresis loop. Hysteresis is the dependence of a system not… …   Wikipedia