EDN

Reducing EMI in digital systems using spread spectrum clock generators (Part 1 of 2)

Over the past couple of decades, more and more applications are going digital. Implementation of digital systems is very simple as it is entirely about logic; however, complexity increases ...
Semiconductor Engineering

Air-Gap Covert Channel Attack On Spread Spectrum Modulated Clocks (IETR, Lab-STICC)

A new technical paper titled “Clock-to-Clock Modulation Covert Channel” was published by researchers at University of Rennes-INSA Rennes-IETR-UMR and University of South Brittany/Lab-STICC- UMR CNRS. ...
Electronic Design

How Best to Measure SSC on Data

Spread spectrum clocking (SSC) is used in many computer interfaces such as PCI Express and Serial ATA to improve the EMI performance of the interface. It takes the form of frequency modulation (FM) of ...
Electronic Design

Generator-BERT Combo Simplifies Jitter-Tolerance Testing To 12.5 GHz

With 5-Gbit/s and better serial bus standards coming soon, design and test of the next generation of serial bus devices will feature a cast of significant signal integrity and jitter issues. New ...
EDN

Reducing EMI in digital systems using spread spectrum clock generators (Part 2 of 2)

Down Spread: Modulates the reference clock downwards and restricts the maximum frequency of the modulated signal to the frequency of reference clock. Useful in applications which are frequency ...