许多可调整的直流源都呈现出典型的非线性控制特性—经常是电位计指针转向与电流之间出现反比关系。这种情况通常发生在高电平状态下,它意味着对可调范围一端的控制具有超灵敏度,而对另一端的控制则不起作用。通过采用自举反馈(见图),可以产生一个能有效工作在所有电平上的固有线性控制。 Many adjustable DC sources exhibit typical nonlinear control characteristics - often the inverse of the potentiometer pointer turn versus current. This condition usually occurs at high levels, which means that the control over one end of the adjustable range is super-sensitive and the control of the other end does not work. By using bootstrap feedback (see figure), it is possible to produce an inherent linear control that works efficiently at all levels.