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What is digital signal ? What mathematical method are expressed in it? |
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Answer» Solution :In electroniccircuits such as amplifier, oscillator, the signals is in the form of constant change with current or voltage over time. Such signals are CALLED continuous or analog signals. A typical analog signal is shown in figure (a) and (b).  If a current or voltage (signal) has only two minimum and maximum values, the signal is called digital signal. The signal in figure (c ) is in the form of waveform or pusle, which has only two values of the signals.  A BINARY system for displaying such signal is convenience. Binary only has two digits 0 and 1. The maximum value (5V) of voltage is expressed as 1 and the minimum value (0V) is expressed as 0. The input and output voltage indicated by two values (0 and 1) in the digital circuit are valid. |
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