QSPICE AC Small Signal Frequency Response

Описание: This QSPICE introductory video demonstrates how to set up AC (alternating current) small signal frequency domain analyses. The video covers setting up the .ac simulation command statement for small signal AC analysis and the AC specification needed on the source. The video clarifies some points that can otherwise become questions or confusion. For comparison, a transient analysis is also shown. The simulation command statements are implemented using the “Place Text(SPICE directive)” command hotkey “T”. The video compares the netlist to the schematic for multiple versions of AC analysis.

One good resource for SPICE AC analysis is the "SPICE ALGORITHM OVERVIEW" page in the SPICE discussion on ecircuitcenter.com
https://ecircuitcenter.com/SpiceTopic...
AC ANALYSIS is down near the bottom of the page.
"INSIDE A SPICE FILE" https://ecircuitcenter.com/Basics.htm has some examples of source specification including AC and transient in one source.

For more electrical circuit theory technical background and insight about first and second order frequency response, for both RC and RL circuits, please see this book:
“First and Second Order Circuits and Equations – Technical Background and Insights, which is available from John Wiley & Sons
ISBN: 978-1-119-91353-5
https://www.wiley.com/en-us/First+and...

From QORVO, QSPICE can be downloaded from this link: https://p.qorvo.com/get-qspice
For new SPICE users, the video introduces netlists, connectivity, and ground.


00:00 Introduction
00:16 AC Analysis - Two Requirements
00:30 Help Doc for AC Analysis
01:09 Netlist & Circuit - AC Analysis
01:18 Setting Up AC Analysis - 2 Parts
01:52 Place AC Source in Schematic
02:20 Set AC Analysis Simulation Command
03:11 2nd AC Analysis Schematic & Netlist
03:25 AC Analysis Simulation Results
03:41 Compare two AC=1 Configurations
04:30 Copy & Paste Simulation Command
04:41 .tran Simulation Command
04:53 Time Domain Simulation Result
05:05 AC Analysis Can Use DC Source
05:25 Changing Source to DC
05:56 AC Simulation with DC Source
06:06 Summary - 2 Pieces - DC Source OK
06:34 Final Points - DC Operating Point
06:59 Reference Link - ecircuitcenter.com