1F N Electronic Flicker Pulsing

摘要

Pulsing circuits generate electromagnetic interference (EMI) that can affect sensitive circuitry and adversely contribute to the spectral signature of equipment. 'Flicker noise' concepts, derived from chaos theory, have been employed to efficiently pulse circuitry while generating a virtually undetectable spectral signature. Pure flicker pulsing requires that the components be driven with a set of uncorrelated pulses, with random heights, starting at random times. However, a significant reduction in conspicuous power spectral density (PSD) components can be achieved when imposing practical constraints. We have been able to significantly reduce the dominant components of the power spectrum using fixed pulse durations and magnitudes. We employed flicker pulsing, with a PSD approaching (1/f)2, to drive our components more efficiently, resulting in a 40% increase in battery life. The contribution of the pulses to the spectral signature of the equipment appears only in the background noise of EMI detectors.