Active EMI reduction
Encyclopedia
Active EMI Reduction refers to techniques such as spread spectrum
clocking to reduce the effects of electromagnetic interference
or EMI. It contrasts with "passive" techniques such as capacitors or shielding.
Spread spectrum
Spread-spectrum techniques are methods by which a signal generated in a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth...
clocking to reduce the effects of electromagnetic interference
Electromagnetic interference
Electromagnetic interference is disturbance that affects an electrical circuit due to either electromagnetic induction or electromagnetic radiation emitted from an external source. The disturbance may interrupt, obstruct, or otherwise degrade or limit the effective performance of the circuit...
or EMI. It contrasts with "passive" techniques such as capacitors or shielding.