Resultado de búsqueda
The spread-spectrum clocking feature distributes the fundamental clock frequency energy throughout your design to minimize energy peaks at specific frequencies. By reducing the spectrum peak amplitudes, the feature makes your design more likely meets the EMI emission compliance standards, and reduces costs associated with traditional EMI ...
- IP Core User Guide
Advanced Control Signals (pllena, areset, pfdena) Clock...
- Phase-Locked Loop
Advanced Control Signals (pllena, areset, pfdena) Clock...
- IP Core User Guide
Learn how spread spectrum clocking reduces EMI by modulating the ideal position of the clock edge and spreading the signal spectrum. See the advantages, disadvantages, and examples of spread spectrum clocking for microprocessor clocks and USB/PCIe reference clocks.
1 de feb. de 2004 · Spread Spectrum Clocking. The idea behind using a spread spectrum technique to reduce EMI is to keep the clock moving. A steady clock is an easy target for neighboring devices and conformity test equipment to lock onto, allowing them time to accumulate emanating signal energy at the fixed clock frequency or its harmonics.
Spread-spectrum clocking, like other kinds of dynamic frequency change, can also create challenges for designers. Principal among these is clock/data misalignment, or clock skew . A phase-locked loop on the receiving side needs a high enough bandwidth to correctly track a spread-spectrum clock.
A spread-spectrum clock (CLK) is an efficient way to reduce EMI. This article describes how the spread-spectrum CLK is defined, and provides a simple formula for estimating the EMI suppression. The resulting formula is verified by data generated by the Maxim CLK Generation chip, MAX9492.
9 de dic. de 2020 · Purpose: This 5-minute video describes Spread Spectrum Clocking and how it applies to PCIe systems.What topics are covered?1. Electromagnetic Interference (E...
Spread spectrum clocking (SSC) is a special way to reduce the radiated emissions of digital clock signals. SSC is the variation of the frequency of a clock signal in a controlled way. In the frequency domain, the SSC reduces the peak amplitude of a digital clock signal by shifting the frequency. In other words, the energy of the clock is spread.
