@Stefan Schippers is it possible to declare a global net in xschem ?

The

gnd

symbol (and others) from the primitive library instantiates a global signal. Check out the properties on the symbol.

@Mitch Bailey thank you, I have just reproduced it for a substrate label

!sub

used in our pdk

@Krzysztof Herman (@Mitch Bailey) VDD, GND symbols as well as net labels can be set global or not by adding a

global=1

or

global=0

attribute. Supply tier symbols (

vdd.sym

and

gnd.sym

) have a default setting of

global=1

, while

lab_wire.sym

and

lab_pin.sym

have a default of

global=0

. You can change these defaults by explicitly specifying a

global

attribute. Note1: If you have multiple net names on the same net and only one has

global=1

attribute this is enough to consider the whole net global. Note2: If you declare global a net in a subcircuit (say net

DATA

inside

Xtop.Xsenseamp

) the

.global DATA

is added to the netlist. The hierarchy net

Xtop.Xsenseamp.DATA

is promoted to top level global

DATA

Suggestion. If you set a net label to "global=1" please add a text comment or other marker next to the label, if you copy over this label, change the net name and forget to remove the global attribute you will be creating multiple global nets. I will someday add some graphical element to these net labels if they are set to global, but for the time being take care of this.

@Stefan Schippers thank you for the feedback.