基于PSPICE的傅立叶分析

Fourier analysis based on PSPICE

放大电路对不同频率的信号呈现出不同的阻抗值,因此对不同频率信号的放大效果不完全一样,致使输出信号不能重现输入信号,这就产生了幅度和相位的失真。为减少失真,应该保证电路有一个稳定的静态工作点,同时,输入信号的幅值不能太大,电路的通频带应尽可能地宽一些。PSPICE是一个通用的电路设计和分析软件,在建立硬件电路之前,借助PSPICE进行模拟分析,可以节省大量的时间和资金,使产品开发时间短、更新快。本文结合分压式偏置放大电路在PSPICE环境下进行傅立叶仿真,得出了一些符合实际的结果。

The amplify circuit emerges different impedance to different frequency signal, so the amplify effect is not all the same to different frequency signal, and results in that the output signal is not the same as the input＇s, causing the distortion of scope and phase as well. In order to decrease the distortion, we should keep the circuit in a stable quiescent point, and that the scope of input signal is not too large and the circuit＇ s pass band is as wide as possible. PSPICE is a general circuit design and analyzing software. Before setting up a hardware circuit, with the help of PSICE, we may analog the circuit, and will save a lot of time and fund to shorten the time of product＇s development and renew as well. This article conducted the Fourier simulation based on PSPICE by uniting a voltage division type bias amplify circuit to obtain some corresponding practical results.