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<p><b>Passivity</b> is a property of engineering systems, most commonly encountered in <a href="page.php?w=analog_electronics">analog electronics</a> and <a href="page.php?w=control_system">control system</a>s. Typically, analog designers use passivity to refer to <b>incrementally passive</b> components and systems, which are incapable of <a href="page.php?w=Gain_%28electronics%29">power gain</a>. In contrast, control systems engineers will use passivity to refer to <b>thermodynamically passive</b> ones, which consume, but do not produce, energy.</p><p>
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