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 hydrosphere (from Greek á½Î´ÏÏ - hydÅr, water and ÏÏÎ±á¿ÏÎ± - sphaira, sphere) in physical geography describes the combined mass of water found on, under,... The hydrosphere (from Greek á½Î´ÏÏ - hydÅr, water and ÏÏÎ±á¿ÏÎ± - sphaira, sphere) in physical geography describes the combined mass of water found on, under,... Skip navigation Sign in