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  2. Barkhausen stability criterion - Wikipedia

    en.wikipedia.org/wiki/Barkhausen_stability_criterion

    Barkhausen's criterion is a necessary condition for oscillation but not a sufficient condition: some circuits satisfy the criterion but do not oscillate. [5] Similarly, the Nyquist stability criterion also indicates instability but is silent about oscillation. Apparently there is not a compact formulation of an oscillation criterion that is ...

  3. Barkhausen–Kurz tube - Wikipedia

    en.wikipedia.org/wiki/Barkhausen–Kurz_tube

    Experimental low power 3 GHz AM communication link from 1938 uses Barkhausen-Kurz tubes for both transmitting and receiving. The Barkhausen–Kurz tube, also called the retarding-field tube, reflex triode, B–K oscillator, and Barkhausen oscillator was a high frequency vacuum tube electronic oscillator invented in 1920 by German physicists Heinrich Georg Barkhausen and Karl Kurz.

  4. Colpitts oscillator - Wikipedia

    en.wikipedia.org/wiki/Colpitts_oscillator

    Thus, the total phase shift around the loop is 360 degrees, which is equivalent to zero degrees. This satisfies the Barkhausen criterion for oscillation. The amplitude of the oscillation depends on the feedback gain and the losses in the tank circuit. The feedback gain should be equal to or slightly greater than the losses for sustained ...

  5. List of diagnostic classification and rating scales used in ...

    en.wikipedia.org/wiki/List_of_diagnostic...

    The following diagnostic systems and rating scales are used in psychiatry and clinical psychology.This list is by no means exhaustive or complete. For instance, in the category of depression, there are over two dozen depression rating scales that have been developed in the past eighty years.

  6. Heinrich Barkhausen - Wikipedia

    en.wikipedia.org/wiki/Heinrich_Barkhausen

    Heinrich Georg Barkhausen (2 December 1881 – 20 February 1956) was a German physicist who established an influential research laboratory in Dresden. [1] The phenomenon by which ferromagnetic domains align during magnetization and produce discrete acoustic changes due to rotations of the Weiss domains is named after his observations as the magnetic Barkhausen effect.

  7. What type of pen does Donald Trump use? Here's how he signs ...

    www.aol.com/type-pen-does-donald-trump-183826477...

    What happens after an executive order is signed? After a president signs an executive order, the White House sends the document to the Office of the Federal Register, the executive branch's ...

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