Analog circuit

An analog circuit (or analogue circuit) is an electric circuit that operates on analog signals.

Related Topics:
Electric circuit - Analog signal

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While operating on an analog signal, an analog circuit changes the signal in some manner or manners. It may be designed to amplify, attenuate, provide isolation, distort, or modify the signal in some other way. It can be used to convert the signal into some other format such as a digital signal. Analog circuits also modify signals in unintended ways such as adding noise or distortion.

Related Topics:
Amplify - Attenuate - Isolation - Distort - Digital

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Passive analog circuits consume no external electrical power while active analog circuits use an electrical power source to achieve the designer's goals. An example of a passive analog circuit is a passive filter that limits the amplitude at some frequencies

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vs. others. A similar example of an active analog circuit is an active filter. It does a similar job only it uses an amplifier to accomplish a similar task.

Related Topics:
Active filter - Amplifier

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Advantages of a passive analog circuit are it requires no power source, gives off less heat, and may produce less noise. Advantages of an active analog circuit is it can load the signal less, amplify as well as attenuate the signal and by using capacitors in combination with amplifiers it can simulate an inductor. Simulation of inductions has the advantage of reducing weight and cost.

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