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<p>and <a href="page.php?w=digital_signal">digital signal</a>s; according to the determinacy of signals, classified into deterministic signals and random signals; according to the <a href="page.php?w=Signal_strength_in_telecommunications">strength of signals</a>, classified into energy signals and power signals.</p>

<p><big> Analog and digital signals </big></p>
<p>Two main types of signals encountered in practice are <a href="page.php?w=analog_signal">analog</a> and <a href="page.php?w=digital_signal">digital</a>. The figure shows a digital signal that</p><p>
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