33
Why does this diagram on CMOS switching show the ground voltage rising? (programming.dev)
submitted 11 months ago by to c/askelectronics@discuss.tchncs.de
8 comments fedilink hide all child comments
 

This is from a section on why decoupling capacitors should be attached to CMOS chips. It shows current spikes during transitions. Which then because of the inductance of traces connecting power to the chip, will cause the power rail voltage to droop.

But why is the ground voltage also shown to rise? What does it even mean for ground voltage to rise when ground is what voltage is measured against?

you are viewing a single comment's thread
view the rest of the comments
[–] [S] 3 points 11 months ago

Oh that makes sense, thanks :)

  • permalink
  • fedilink
  • source
  • parent