Electrostatic discharge protection device and common mode suppression circuit on printed circuit board codesign

This paper introduces a codesign of electrostatic discharge (ESD) protection device and common mode suppression circuit on printed circuit board (PCB) for high-speed input/output interfaces. The characteristic and model of ESD protection device are investigated and applied into the design of common mode suppression circuit. The proposed design of two-layered PCB structure performs -10 dB common mode noise suppression from 2.22 GHz to 2.76 GHz; the proposed design with additional common mode suppression cell performs wideband suppression from 2.25 GHz and over 8 GHz. The insertion loss of differential signal for proposed design and reference circuit is similar in experimental result.