Noise (electronics)

High Quality Content by WIKIPEDIA articles! In electronics and communication systems, noise is a random fluctuation or variation of an electromagnetic analog signal such as a voltage or a current. Electronic noise is a characteristic of all electronic circuits. Depending on the circuit, the noise generated by electronic devices can vary greatly. Noise can be produced by several different effects. Thermal noise and shot noise are inherent to all devices. The other types depend mostly on manufacturing quality and semiconductor defects. The noise level in an electronic system is typically measured as an electrical power N in watts or dBm, a root mean square (RMS) voltage (identical to the noise standard deviation) in volts or dB?V or a mean squared error (MSE) in squared volts. The noise may also be characterized by its probability distribution and noise spectral density N0(f) in watts per hertz.

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In electronics and communication systems, noise is a random fluctuation or variation of an electromagnetic analog signal such as a voltage or a current. Electronic noise is a characteristic of all electronic circuits. Depending on the circuit, the noise generated by electronic devices can vary greatly. Noise can be produced by several different effects. Thermal noise and shot noise are inherent to all devices. The other types depend mostly on manufacturing quality and semiconductor defects. The noise level in an electronic system is typically measured as an electrical power N in watts or dBm, a root mean square (RMS) voltage (identical to the noise standard deviation) in volts or dBµV or a mean squared error (MSE) in squared volts. The noise may also be characterized by its probability distribution and noise spectral density N0(f) in watts per hertz.