# Circuit Analysis Using Pspice - An Introduction

### Circuit Analysis by Pspice:

Using Pspice tool, we can do various types of analysis in an electrical circuit.
They are

• DC analysis,
• AC analysis also known as Sinusoidal steady state linear analysis,
• Transient analysis (also known as Time domain linear/non linear analysis).

In addition to this, Pspice will do the

• Sensitivity analysis/ Worst Case analysis,
• Optimizer ( component value optimization),
• Smoke (Part over stress analyzer) and
• Monte Carlo(statistical) analysis.

In this post we will see each analysis in brief:

DC Sweep Analysis:
The DC Sweep Analysis  of electrical and electronic circuits can be employed to determine the dc operating point.
It is also possible to sweep a voltage or current source to obtain a dc(static) transfer function.

AC Sweep Analysis:
The AC Sweep Analysis can be employed to determine frequency response ( ex. Bode Plots) and to determine the impedances and admittances.
Pspice AC analysis can be used to perform a noise analysis.

Transient analysis:
The Transient analysis can be employed to generate the time domain response.
By inspecting the output waveforms the system distortion is obtained.
The Pspice postprocessor looks like an oscilloscope.

Smoke analysis:
The Smoke analysis can be employed to examine the maximum voltage, currents and power dissipation.
Based on these values we can find which components may be over stressed.

Monte Carlo analysis:
The Monte Carlo analysis can be employed to determine the typical, minimum and maximum (ie, worst case) values based on the device and lot tolerances.
It is a statistical analysis.

Sensitivity analysis/ Worst Case analysis:
The sensitivity and Worst Case analysis can be employed to determine the relative effect of each component on the measurement point on the circuit.
It is obtained from the bar graph generated by the analysis.