The concepts of equilibrium solution, initial variation and feedback gain of circuit variables are introduced.
提出了电路变量的平衡解、初期量变和反馈增益的概念。
A stable or unstable circuit can be explained with the tendency of initial variation of circuit variables relative to the equilibrium solution, and can be discriminated on the feedback gain.
稳定电路或不稳定电路可用电路变量相对于平衡解的初期量变趋势来解释，而由反馈增益加以判断。
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