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What is the differences between Digital Signals vs. Analog Signals?

What Makes Digital Signals Different From Analog Signals?
July 18, 2013


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What are Digital Signals?

• They are signals that are non-continuous electrical.
• They are like the Morse code.
• They are interpreted into words by the computer where they are sent to.
• They usually travel through phone lines.
• They have accurate amplitudes and shapes.
• They are being delivered continuously.
• They are uniformed and completely different from analog signals.
• They have digits or pulses.
• The pulse’s specified value in a digital signal doesn’t change until a variation happens to the next digit.
• Digital signals vary in every step.
• Their levels are discrete.
• In a digital signal, there are 2 levels for its amplitude. These levels are given the name ‘nodes’. The nodes can be high or low, true or false and 1 or 0.
• Any kind of distortion or noise cannot easily destroy the quality of a digital signal. That’s main reason behind its popularity in the past few decades.
• They are preferred more than analog signals because of their reliability, easy and inexpensive transmission.
• Now, they are being used by most electronic gadgets (cell phones, tablets etc) that are available in the market.

What are Analog Signals?

• They are signals that are continuous electrical.
• They were used to relay messages through copper wires during the 1800’s
• They are the voice intensification which causes changes in an electric current.
• They also symbolize the real quantity.
• They are not constant. They change in time and their changes are similar to a signal that doesn’t run on electricity.
• They usually catch noise or electromagnetic waves that are distorted.
• Actually, these signals are inconvenient to use. They are expensive to transmit. They are not easy to maintain and they tend to diminish a signal’s quality.

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