指導教授：洪崇 智 Advisor：Prof. Chung-Chih Hung

Electronic equipments often generate Electric-Magnetic Interference (EMI) that affects the operation of other equipments. In a portable device, the high-speed interfaces between peripheral storages and the other signal processing units are the main noise sources. The conventional techniques to reduce EMI tend to enclose or reduce the amount of the generated radiation, such as shield cables and coaxial wires, but are usually costly and bulky. Modern EMI reduction is done on-chip without using heavy shielding materials to the goal of low-cost and flexibility. Altering the center frequency of internal clocks is a widely adopted EMI reduction technique. The technique is called Spread Spectrum Clocking (SSC