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2. Self-oscillation - Wikipedia

   en.wikipedia.org/wiki/Self-oscillation

   Self-oscillation is the generation and maintenance of a periodic motion by a source of power that lacks any corresponding periodicity. The oscillator itself controls the phase with which the external power acts on it.

3. Royer oscillator - Wikipedia

   en.wikipedia.org/wiki/Royer_oscillator

   The original Royer oscillator/inverter is an example of a "self-oscillating circuit" since its frequency of operation is determined solely by the external source of power (the input DC voltage) and at least one of the main power components that process the full power that passes through the apparatus, refer note 1 below.

4. Electronic oscillator - Wikipedia

   en.wikipedia.org/wiki/Electronic_oscillator

   Simple relaxation oscillator made by feeding back an inverting Schmitt trigger's output voltage through a RC network to its input.. An electronic oscillator is an electronic circuit that produces a periodic, oscillating or alternating current (AC) signal, usually a sine wave, square wave or a triangle wave, [1] [2] [3] powered by a direct current (DC) source.

5. Joule thief - Wikipedia

   en.wikipedia.org/wiki/Joule_thief

   The joule thief is not a new concept. Basically, it adds an LED to the output of a self-oscillating voltage booster, which was patented many decades ago.. US Patent 1949383, [1] filed in 1930, "Electronic device", describes a vacuum tube based oscillator circuit to convert a low voltage into a high voltage.

6. Pentagrid converter - Wikipedia

   en.wikipedia.org/wiki/Pentagrid_converter

   Circuit symbol of a heptode. The development of the pentagrid or heptode (seven-electrode) valve was a novel development in the mixer story. The idea was to produce a single valve that not only mixed the oscillator signal and the received signal and produced its own oscillator signal at the same time but, importantly, did the mixing and the oscillating in different parts of the same valve.

7. Crystal oscillator - Wikipedia

   en.wikipedia.org/wiki/Crystal_oscillator

   A crystal oscillator is an electronic oscillator circuit that uses a piezoelectric crystal as a frequency-selective element. [1] [2] [3] The oscillator frequency is often used to keep track of time, as in quartz wristwatches, to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters and receivers.

8. A Whole New You: The Oprah Daily Self-Care O-wards 2025

   www.aol.com/whole-oprah-daily-self-care...

   The Oprah Daily Self-Care O-wards 2025 Hearst Owned ... “Patients share their data with me so I can monitor their heart rate variability, a key metric for understanding how well the body is ...

9. Tapered element oscillating microbalance - Wikipedia

   en.wikipedia.org/wiki/Tapered_element...

   A tapered element oscillating microbalance (TEOM) is an instrument used for real-time detection of aerosol particles by measuring their mass concentration. It makes use of a small vibrating glass tube whose oscillation frequency changes when aerosol particles are deposited on it increasing its inertia .