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Reference.org
DC bias
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<p>In <a href="/facts/Signal_processing/Npaja6zb">signal processing</a>, when describing a <a href="/facts/Periodic_function/Sm8lJQsF">periodic function</a> in the <a href="/facts/Time_domain/1w6mP2MU">time domain</a>, the DC bias, DC component, DC offset, or DC coefficient is the <a href="/facts/Mean/swcEd4Pg">mean</a> value of the <a href="/facts/Waveform/yAskMREw">waveform</a>. A waveform with zero mean or no DC bias is known as a <i>DC balanced</i> or <i>DC free</i> waveform. </p>