Power/ground wiring for high speed driver: Evaluating method by comparison with actual and simulation schemes

In our previous studies [1], [2], good power supply wirings on a chip have provided excellent high-speed switching and tinny power swing fluctuation. In this study, we again confirmed this by higher precision re-measurements correlated with simulations. If the power integrity (PI) would be better on the circuit, the circuit would be expected that the CMOS driver makes it sure to take higher-speed switching. Such kind of scheme had not been tried previously, because the power line performance expression by SPICE tool had to be difficult to coincident with actual power line. We planed to build the power supply circuit model by SPICE tool reflected faithfully with the test coupon. As the simulation model from the transmission line for the power line is coincided with actual physical structure, we can make the concept how to design and produce circuits from the variation of simulation results. Then we can get the key design rule for over Gbps region on a input/output (I/O) interface circuit system.