Fli091: Created a guide to dc operating parameters in cadence virtuoso

2017-11-11T15:59:04Z

Created a guide to dc operating parameters in cadence virtuoso

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= Show DC operating parameters =
This guide will show you how to show DC operating parameters like gm, R_{out} V_{th} etc for all your transistors in a Cadence schematic.

If you just want to save all parameters to a file have a look at this guide instead: [[Transistor operating point printer]]

== Steps ==
# Create your circuit in a schematic
# Set up a DC simulation, check the "save operating point"-box in the creating of the test
# Go back to your schematic window and at the top-men click:
# View - Annotations - DC Operating Points. This will give a default selection of parameters [[File:AnnotationMenu.png|thumbnail|right|The annotation menu]]
# To chose which to view in your schematic go back to View - Annotations and at the bottom click "Setup.."
# Make sure the library-drop-down is showing "tsmc13rf" (or your transistor library), choose pmos in "Cell" and leave instance to "*" if you want to change it for all transistors in your sheet.
# Here you can see the list that is showing by default and three "free" cells at the rows Parameter:cdsPara(6), (7) and (8)
# Double click in the column "Expression" for those rows and select the parameter you want to show (i.e region, rout, gm, gds) [[File:AnnotationSetupWindow.png|100px|thumbnail|right|The annotation setup window]]
#* You might want to disable annotation of the first four rows here to hide some annotation noise
# Click apply and repeat the same steps for the nmos cell [[File:PmosWithDCParameters.png|thumbnail|right|PMOS with parameters showing]]
# Save this annotation set-up by clicking File - Save. Chose the default location to make it easy for yourself. (If you don't save you have to do this set-up every time you close Virtuoso)
#* The next time you load your design just click View - Annotations - Setup.. and then File - Load - OK

== Note ==
* Region 0 is cutoff
* Region 1 is linear
* Region 2 is saturation
* Region 3 is subthreshold
* Region 4 is breakdown

* Type 0 is nMOS
* Type 1 is pMOS

[[Category:Mikroelektronikk]] [[Category:Integrated_Circuts]]

DCoperatingparameters - Revision history

Fli091: Created a guide to dc operating parameters in cadence virtuoso