As signal rise times continue to increase, a phenomenoncalled "ground bounce" begins to be an issue.But many people don't know what it is or don't knowmuch about it. Here are some things it isn't. It isn't whathappens when Ken Griffy Jr. hits a ground ball. It's notwhat happens when your checkbook gets really low.And its not what happens in an earthquake. It IS asource of circuit noise and signal distortion that occursinside an IC package, and therefore is not well understoodby some people outside the semiconductor industry.