Jitter attenuators are clock generators with specialized circuitry for reducing jitter (noise). They may also be called clock cleaners or jitter cleaners. These highly specialized timing devices remove jitter from incoming reference clocks and minimize jitter in the system. Jitter attenuators are typically used in high-speed applications such as Synchronous Ethernet and SDI Video to ensure that all physical layer data transmission is synchronized. Displayed on the right is a simplified block diagram of Skyworks Solutions Si5345 Jitter Attenuating clock. Skyworks Solutions jitter attenuating clocks offer unmatched performance because they combine two best-in-class Skyworks Solutions proprietary technologies: DSPLL and MultiSynth. Skyworks Solutions DSPLL provides jitter attenuation of any frequency reference. MultiSynth is a fractional divider with built-in phase error compensation, enabling this class of products to generate any combination of frequencies with ultra-low jitter (100 fs). In addition, all clocks are generated exactly with 0 ppm frequency synthesis error.