Logo on the right: Power Integrity

The logo on the right is an illustration from my power-integrity training classes.  The Excel surface plot shows the DC potential distribution on a conductive square plane with a smaller square-shaped current-consumer in the middle and a short line-type source along the front left edge.  The plane was modeled with a resistive grid and the simulations were done in Berkeley SPICE.  The grey footprint of the plot represents the plane shape; the vertical axis shows voltage on linear scale.  You can also recognize a variant of this plot on the front cover of the book: Frequency-Domain Characterization of Power Distribution Networks.