What is Spread Spectrum Clocking?
Spread Spectrum Clock Generation (SSCG) is a frequency generation method where the clock frequency is modulated in a pre-determined manner to reduce the total Electro Magnetic Interference (EMI) of an electronics system. EMI occurs when an electronic device generates unwanted harmonics in the frequency spectrum, and impacts the operation and performance of nearby devices. With its CHO technology, Mobius Microsystems offers a powerful tool to lower EMI. Our devices build upon the industry standard SSCG techniques, by far the most effective and most preferred method to control EMI. Unlike conventional SSCG implementations however, the Mobius SSCG CHO replaces both the quartz crystal and the PLL ICs with a monolithic CMOS die, and generates Spread Spectrum Clocks without the need for an external resonator. The elimination of the quartz crystal improves reliability, eliminates bulky packages from the system and lowers BOM count. The elimination of the PLL improves performance by reducing c
