Electronic Design

Measure Spread-Spectrum Clock’s Effects On Switching Supply EMI

Fig 1. In a typical PWM controller in which the active devices are driven by a simple square wave, a Fourier representation of the clock’s frequency spectrum consists of the fundamental switching ...
EDN

Spread-spectrum clock oscillators lower EMI

Controlling EMI remains a challenge for the electronics designer. The digital system clock is often the largest contributor both because the frequency of the system clock is many times the highest of ...
EDN

Spread spectrum clock oscillators enable efficient and economic reduction of EMI

Cambridge, UK — Middleton, WI — Precision Devices has announced the introduction of two new spread spectrum clock oscillators, the SSOC5 and SSOC7. Both devices provide an efficient and economic ...
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 ...
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. ...