基于叠加定理分析和设计低频小信号放大器

低频小信号放大电路是常用的实用电路,电路中既有线性元件,又有非线性元件,而且直流、交流并存于电路中,因此在分析和设计电路时较为复杂。叠加定理把线性电路中多个电源作用分解成各个电源的单独作用,然后进行代数和叠加。属于非线性元件的半导体晶体管工作在低频小信号,近似作为线性元件使用。应用叠加定理分析和设计低频小信号放大电路,抓住主要,忽略次要,使问题变得既容易、简单又明确。

Low Frequency Small Singal Amplifier Based on Superposition Theorem

Low frequency small signal amplifying circuit includes linear and nonlinear elements,DC and AC,so it's more complicated while analyzing and designing this kind of circuit.Superposition theorem can take several sourece's action as every source action's algebraic sum.The transistor is approximate linear element when it works in low frequency small signal.Applying superposition theorem to analyze and design low frequency small signal amplifier can make the question easy,simple and clear.