Correlation between noise and EMI on nanometer multi-quantum well InGaN LED

Abstract This study investigates the low-frequency noise induced by electromagnetic radiation interference (EMI) in a nanometer multi-quantum well InGaN LED (NMQ LED). Theoretical models of the noise spectra and the EMI are constructed. In general, a good agreement is identified between the experimental and theoretical results. Experimental and numerical results reveal that the magnitude of the EMI-induced noise is related to the pulse height, the output load, the parasitic capacitance, and the interference amplitude. It is shown that a higher interference amplitude increases the harmonic noise. Moreover, this thesis presents a complete measurement to obtain the interference noise and signal-to-noise ratio.