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- Analog_signal abstract "An analog or analogue signal is any continuous signal for which the time varying feature (variable) of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal. For example, in an analog audio signal, the instantaneous voltage of the signal varies continuously with the pressure of the sound waves. It differs from a digital signal, in which a continuous quantity is represented by a discrete function which can only take on one of a finite number of values. The term analog signal usually refers to electrical signals; however, mechanical, pneumatic, hydraulic, and other systems may also convey analog signals.An analog signal uses some property of the medium to convey the signal's information. For example, an aneroid barometer uses rotary position as the signal to convey pressure information. In an electrical signal, the voltage, current, or frequency of the signal may be varied to represent the information.Any information may be conveyed by an analog signal; often such a signal is a measured response to changes in physical phenomena, such as sound, light, temperature, position, or pressure. The physical variable is converted to an analog signal by a transducer. For example, in sound recording, fluctuations in air pressure (that is to say, sound) strike the diaphragm of a microphone which induces corresponding fluctuations in the current produced by a coil in an electromagnetic microphone, or the voltage produced by a condensor microphone. The voltage or the current is said to be an "analog" of the sound.An analog signal has a theoretically infinite resolution. In practice an analog signal is subject to electronic noise and distortion introduced by communication channels and signal processing operations, which can progressively degrade the signal-to-noise ratio. In contrast, digital signals have a finite resolution. Converting an analog signal to digital form introduces a constant low-level noise called quantization noise into the signal which determines the noise floor, but once in digital form the signal can in general be processed or transmitted without introducing additional noise or distortion. Therefore as analog signal processing systems become more complex, they may ultimately degrade signal resolution to such an extent that their performance is surpassed by digital systems. This explains the widespread use of digital signals in preference to analog in modern technology. In analog systems, it is difficult to detect when such degradation occurs. However, in digital systems, degradation can not only be detected but corrected as well.".
- Analog_signal wikiPageID "993".
- Analog_signal wikiPageRevisionID "604154697".
- Analog_signal hasPhotoCollection Analog_signal.
- Analog_signal subject Category:Analog_circuits.
- Analog_signal subject Category:Electronic_design.
- Analog_signal subject Category:Television_terminology.
- Analog_signal subject Category:Video_signal.
- Analog_signal type AnalogCircuits.
- Analog_signal type Artifact100021939.
- Analog_signal type Circuit103033362.
- Analog_signal type Device103183080.
- Analog_signal type ElectricalDevice103269401.
- Analog_signal type Instrumentality103575240.
- Analog_signal type Object100002684.
- Analog_signal type PhysicalEntity100001930.
- Analog_signal type Whole100003553.
- Analog_signal comment "An analog or analogue signal is any continuous signal for which the time varying feature (variable) of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal. For example, in an analog audio signal, the instantaneous voltage of the signal varies continuously with the pressure of the sound waves.".
- Analog_signal label "Analog signal".
- Analog_signal label "Analogico".
- Analog_signal label "Analogique".
- Analog_signal label "Analogsignal".
- Analog_signal label "Analoog".
- Analog_signal label "Señal analógica".
- Analog_signal label "Sinal analógico".
- Analog_signal label "Sygnał analogowy".
- Analog_signal label "Аналоговый сигнал".
- Analog_signal label "إشارة تناظرية".
- Analog_signal label "アナログ".
- Analog_signal label "模擬信號".
- Analog_signal sameAs Analogový_signál.
- Analog_signal sameAs Analogsignal.
- Analog_signal sameAs Αναλογικό_σήμα.
- Analog_signal sameAs Señal_analógica.
- Analog_signal sameAs Analogique.
- Analog_signal sameAs Isyarat_analog.
- Analog_signal sameAs Analogico.
- Analog_signal sameAs アナログ.
- Analog_signal sameAs 아날로그.
- Analog_signal sameAs Analoog.
- Analog_signal sameAs Sygnał_analogowy.
- Analog_signal sameAs Sinal_analógico.
- Analog_signal sameAs m.0lh7.
- Analog_signal sameAs Q174948.
- Analog_signal sameAs Q174948.
- Analog_signal sameAs Analog_signal.
- Analog_signal wasDerivedFrom Analog_signal?oldid=604154697.
- Analog_signal isPrimaryTopicOf Analog_signal.