Using S-Edit (Schematic Entry Tool) & T-SPICE (Analog Simulation Tool)

An introductory lab to SPICE software.
By Lucien Gheerbrant
Table of Contents

This is from an introductory lab to SPICE software. It allows to design and test circuits.

This lab also focuses on MOS drain current vs. drain-to-source voltage depending on Vgs values. We also simulate a silicon diode and output its characteristic.

This lab was really guided and simply introductory. It consisted into copying the schematics given and give it the specified parameters and then simulate.

NMOS

Figure 1: NMOS
Figure 2: NMOS drain current vs. drain-to-source voltage depending on Vgs

PMOS

Figure 3: PMOS schematic
Figure 4: PMOS drain current vs. drain-to-source voltage depending on Vgs

Silicon Diode

Figure 5: Silicon diode schematics
Figure 6: Silicon diode characteristic

Conclusions

We can see the theoretical functions of the MOS transistors, with the triode region on the first values of the drain-to-source voltage, and the linear region. For the silicon diode, we can see the reversed bias and forward bias as the current (or voltage) increases.