An on-/off-chip co-design methodology for suppressing radiated emissions from the high-definition DTV system

Electromagnetic interference (EMI) problems have already received more and more recognition in applications of today´s digital products. For the high-resolution digital television (DTV) system, this paper demonstrates a co-design methodology involving both the on-chip and off-chip environments to suppress the serious radiated emissions, so as to meet the requirements of general EMI regulations. The on-chip solution mainly focuses the discussion on the slew-rate control of active devices while the off-chip solution puts emphasis on the ground plane completeness as well as the placement and selection of series termination. Moreover, the effectiveness of either on-chip or off-chip solution will be evaluated. Finally, some EMI experiments are performed to validate the design concept.