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. Author manuscript; available in PMC: 2019 Oct 1.
Published in final edited form as: IEEE Trans Biomed Circuits Syst. 2018 Sep 20;12(5):1100–1111. doi: 10.1109/TBCAS.2018.2871470

Fig. 9.

Fig. 9.

Circuit schematics of a US-powered optogenetic stimulator. The corresponding efficiency terms in (8) are illustrated with the flow diagram.