一、前言在电子线路设计中,往往要对被设计线路中几个方面进行考虑,以使所设计的线路能满足事先要求的特性。但在实际处理中,要求的特性常常是相互联系甚至是矛盾的。例如,要求设计一个放大电路时,希望得到一定的增益和带宽指标,但这两个特性指标本身是成反比关系的,即增益提高会引起通带变窄,而增加 I. Introduction In the design of electronic circuits, it is often necessary to consider several aspects of the circuit being designed so that the designed circuit can satisfy the characteristics required in advance. However, in practice, the required characteristics are often inter-related or even contradictory. For example, when it is required to design an amplifying circuit, it is desirable to obtain a certain gain and bandwidth index, but the two characteristic indexes are inversely proportional to each other. That is, the gain increase causes the pass band to be narrowed and increases