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Minor loop feedback
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<p>Minor loop feedback is a <a href="/facts/Classical_control_theory/NBAgCCcv">classical</a> method used to design stable robust linear <a href="/facts/Feedback/XnuWH3zp">feedback</a> control systems using feedback loops around sub-systems within the overall feedback loop. The method is sometimes called <i>minor loop synthesis</i> in college textbooks, some government documents. </p><p>The method is suitable for design by graphical methods and was used before digital computers became available. In World War 2 this method was used to design <a href="/facts/Gun_laying/MVF9eXgJ">gun laying</a> control systems. It is still used now, but not always referred to by name. It is often discussed within the context of <a href="/facts/Bode_plot/xcF1ej98">Bode plot</a> methods. Minor loop feedback can be used to stabilize opamps. </p>