Abstract-In high-speed digital systems, most of the electromagnetic interference (EMI) from the system is caused by high-speed digital clock drivers and synchronized circuits. To reduce the EMI from the system clocks, spread spectrum clock (SSC) techniques that modulate the system clock frequency have been proposed. A conventional SSC generator (SSCG) has been implemented with a phase locked loop (PLL) by controlling a period jitter. However, the conventional SSCG with PLL becomes more difficult to implement …
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