@conference {12406,
	title = {Impact of VCO non-linearities on VCO-based sigma-delta modulator},
	booktitle = {International Young Engineers Forum (YEF-ECE)},
	year = {2018},
	month = {May},
	publisher = {IEEE},
	organization = {IEEE},
	address = {Caparica, Portugal},
	author = {Bruno Ferreira and Miguel Fernades and Lu{\'\i}s Oliveira and Jo{\~a}o Goes}
}
