open-source-silicon.dev

Hi all! <@U01819B63HP> sorry for the tag but I am making an amplifier using an inverter. Transient analysis is working smoothly but I can't run its AC analysis properly. Would appreciate your help regarding this :)

You must add an AC magnitude voltage to your input voltage source. Try adding ac 1 sin(0 10m 10k) to its properties.

<@U088FPVPKL1> Please try this example circuit, it's a nice all-in one that does Op annotation in the schematic, transient analysis, closed loop AC analysis and loop gain stability analysis (of course unneeded on a single stage amplifier like this, but just for fun).

<@U01QTMG2K8R> Oh I see. Will try that. Thanks!

<@U01819B63HP> Thanks for sharing this! I’ll check it out. 

hi <@U01819B63HP> do you happen to know how to fix this issue? seems like I can't plot the vin and vout in db which is why the bandwidth is not showing correctly. but when I plot it on the simulation its working fine.

Wrap the expressions n double quotes:
`"vout db20()"`
`"vin db20()"`
This requirement is no longer necessary on newest xschem builds.The executable you are using is a bit older.
The change to allow unquoted expressions was done on December 5, 2024:
``` 2024-12-05 02:54:34 +0100 (Thu, 05 Dec 2024) | 1 line

Allow wave expressions with spaces on a single line without quotes ("...."). Quotes can be used for wave expression on multiple lines. Side effect: multiple nodes can no more be specified on a single line separated with spaces. Use newlines```