Analog and Digital Signal

772 WordsOct 31, 20144 Pages
ANALOG AND DIGITAL SIGNAL 1.1 Analog signal 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., analog 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, hydraulic, and other systems may also convey analog signals. An analog signal uses…show more content…
In computer architecture and other digital systems, a waveform that switches between two voltage levels representing the two states of a Boolean value (0 and 1) is referred to as a digital signal, even though it is an analog voltage waveform, since it is interpreted in terms of only two levels. 1.3 Difference between digital and analog signal Analog signal 1. It produces a continuous signal. 2. Signal that is continuous in a time and can assume an infinite number of values in a given range. 3. It is denoted by sine wave. 4. Analog hardware is not flexible. 5. It Store data in the form of wave signal. 6. Analog instrument consume more power. 7. It is of low cost and portable. For e.g.:- thermometer. Wave form in analog signal Digital signal 1. It produce a discrete signal 2. Signal that is continuous in a time and assumes only a limited number of values. 3. It is denoted by square wave. 4. Digital hardware is flexible in implementation 5. It store data in the form of binary bit. 6. Digital instrument consume less power. 7. It is expensive and not easily portable. For e.g.: computers. Wave form in digital
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