IHP-GmbH/IHP-Open-PDK

[qucs-s] additional parameters for primitive devices and callbacks support

Opened this issue · 2 comments

sergeiandreyev commented

Environment

OS: Ubuntu 22.04
Qucs-s 24.3.1

Expected Behavior

Primitive library devices have visible parameters that are updated in real-time (using callbacks) based on w/l/other? input settings

Actual Behavior

rfcmim and res devices do not have capacitance nor resistance parameters, only w/l

Ikram-rs22 commented

How to calculate the values of resistance and capacitance from w & l? As far as I know, the sheet resistance of rppd is given between 235-285. Then how would yoi know the actual resistance of rppd? Same with cap_rfcmim.

sergeiandreyev commented

Hi @Ikram-rs22, you can check the formulae to calculate resistance for rppd device in the TCL code of xschem symbol:
https://github.com/IHP-GmbH/IHP-Open-PDK/blob/dev/ihp-sg13g2/libs.tech/xschem/sg13g2_pr/rppd.sym
The same for rfcmim - these should be a part of device callback code.