Conditional stability may occur when a system having saturation or limiting iscompensated by use of a lag compensator.When the saturation or limiting takesplace in the system, it reduces the effective loop gain. Then the system becomesless stable and unstable operation may even result, as shown in Figure 7–108.To avoid this, the system must be designed so that the effect of lag compensation becomes significant only when the amplitude of the input to the saturating element is small. (This can be done by means of minor feedback-loopcompensation.)