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. Author manuscript; available in PMC: 2020 Aug 1.
Published in final edited form as: IEEE Trans Biomed Circuits Syst. 2019 May 23;13(4):608–618. doi: 10.1109/TBCAS.2019.2918761

Fig. 12.

Fig. 12.

(a) Starting up transients of the power management block, (b) measured μLED current at 4 stimulation current settings, and normalized output light as a function of (c) time and (d) μLED current.