@article{brasil_leal-cardoso_1999,  title={An optically coupled power stimulus isolation unit with high voltage and fast rise time output},  volume={32},  ISSN={0100-879X},  url={https://doi.org/10.1590/S0100-879X1999000600013},  DOI={10.1590/S0100-879X1999000600013},  number={6},  journal={Brazilian Journal of Medical and Biological Research},  publisher={Associação Brasileira de Divulgação Científica},  author={Brasil, R.O. and Leal-Cardoso, J.H.},  year={1999},  month={Jun},  pages={767–771} }