Reducing EMI in Digital Systems through Spread Spectrum Clock Generators

Linton, Travis
July 2008
Portable Design;Jul2008, Vol. 14 Issue 7, p28
The article discusses the use of spread spectrum clock generators to reduce the electromagnetic interference (EMI) in digital systems. It is stated that any device capable of generating signals with frequencies in the radio frequency range is a potential source of EMI. It can cause interference in the normal operation of electronic devices including radios, televisions and cell phones. The fixed frequency clock is the primary source of EMI because it always operate at a constant frequency that allows energy to increase to higher levels. The EMI problem can be solved by shielding the design, filtering a signal or removing the energy from the offending source.


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