# Testing the Large-Signal Small-Signal simulator in ADS

Adam Cooman

*In my work on stability analysis, I used the Large-Signal Small-Signal (LSSS)
simulator to determine the linearisation around a periodic orbit of
a circuit. In this post, we verify the accuracy of the LSSS
simulator in Advanced Design System (ADS). To do this, a test system with known frequency
responses is simulated and the simulation results are compared to
the exact expressions to discover the error level in the simulations.*

*We discover that the error made in the simulation is rather
large when the default settings are used. By configuring the simulator
correctly, a better result can be obtained. This work has been done
with the help of Ebrahim Louarroudi.*

- 1. Introduction
- 2. Testing methodology
- 3. Calculating the HTFs in Matlab
- 4. Results and correct simulator settings
- Bibliography

This page contains the text of an appendix of my PhD thesis: Distortion Analysis of analog electronic circuits using modulated signals. The content was modified slightly to better fit the format of this website