An electronic oscillator is an electronic circuit that produces a periodic, oscillating electronic signal, often a sine wave or a square wave. Oscillators convert direct current (DC) from a power supply to an alternating current signal.
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The biosphere is the zone of air, land and water where organisms exist. It is commonly known as the global sum of all ecosystems and consists of several layers including the atmosphere, the lithosphere and the hydrosphere. biosphere zone atmosphere lithosphere hydrosphere. In environmental sciences, scientists will discuss the different areas of the earth and they divided up into the atmosphere, Lithosphere and Hydrosphere which really are really confusing ideas. But ultimately they're just air, the land and the water.