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Transmission of information by changing the magnitude of a carrier signal, for example sending sound by radio. analog circuit A circuit where currents and voltages vary continually within some practical range, in proportion to some signal. analog filter An analog circuit that alters some frequency-related property of a signal. analog signal ...
An analog signal (American English) or analogue signal (British and Commonwealth English) is any continuous-time signal representing some other quantity, i.e., analogous to another quantity. For example, in an analog audio signal , the instantaneous signal voltage varies continuously with the pressure of the sound waves .
Analogue electronics (American English: analog electronics) are electronic systems with a continuously variable signal, in contrast to digital electronics where signals usually take only two levels. The term analogue describes the proportional relationship between a signal and a voltage or current that represents the signal.
Furthermore, "Standard Definition Television" has become necessary to distinguish sets from HDTV (high definition). Boeing 737 Classic When Boeing introduced the 737 Next Generation (-600, -700, -800, and -900 series), the -300, -400, and -500 variants of the Boeing 737 still in service were called the 737 Classic. Boeing 737 Original
There are notable non-electrical analog devices, such as some clocks (sundials, water clocks), the astrolabe, slide rules, the governor of a steam engine, the planimeter (a simple device that measures the surface area of a closed shape), Kelvin's mechanical tide predictor, acoustic rangefinders, servomechanisms (e.g. the thermostat), a simple mercury thermometer, a weighing scale, and the ...
Analog (program), a computer program that analyzes log files from web servers; Analogical models, a method of representing a phenomenon of the world by another, more understandable or analyzable system; Functional analog (chemistry), a compound with similar properties; Structural analog, a compound with an altered chemical structure
Also AM radio or AM. Used interchangeably with kilohertz (kHz) and medium wave. A modulation technique used in electronic communication where the amplitude (signal strength) of the wave is varied in proportion to that of the message signal. Developed in the early 1900s, this technique is most commonly used for transmitting an audio signal via a radio wave measured in kilohertz (kHz). See AM ...
This is a list of examples of early computation devices considered precursors of the modern computers. Some of them may even have been dubbed 'computers' by the press, though they may fail to fit modern definitions. The Antikythera mechanism, dating between 150 and 100 BC, was an early analog computer.