Pspice_introduce Chapter 1 Introduction to PSPICE, a general circuit analysis program for microcomputers, is developed from SPICE (Simulation Program with Intergrated Circuit Emphasis). I. Introduction to PSPICE functions 1. DC analysis: including static operating point analysis of the circuit; DC small signal transfer function value analysis; DC sweep analysis; DC small signal sensitivity analysis. 2. AC small signal analysis: including frequency response analysis and noise analysis. Before PSPICE performs AC analysis, it first calculates the static operating point of the circuit, determines the AC small signal model parameters of all nonlinear devices in the circuit, and then simulates and analyzes the circuit within the frequency range specified by the user. 3. Transient analysis: that is, time domain analysis, including the transient response of the circuit to different signals. After the time domain waveform is subjected to fast Fourier transform (FFT), the spectrum diagram can be obtained. Through transient analysis, the timing waveform of the digital circuit can also be obtained. 4. Monte Carlo analysis and worst case analysis: Monte Carlo analysis is to analyze the changes in current characteristics when the parameters of circuit components are within their respective tolerances (allowable errors) and randomly change according to a certain distribution law. These characteristics include DC, AC or transient characteristics. 2. Circuit description in PSPICE In PSPICE running in Windows environment, the simulated circuit is described in a graphical way. That is, draw the circuit diagram in the drawing editor provided by PSPICE and save it as a graphic file with the extension sch (the computer automatically generates the extension). The components, power supplies and signal sources used in the circuit can be directly called from the library provided by PSPICE. A complete circuit includes not only the structure of the circuit, but also the relevant parameters of each component, signal source and power supply. The structure of the circuit can be described by the component symbols and the connections between them; and the parameters are described in the component attributes (Attributes)...
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