A 20-nW 0.25-V Inverter-Based Asynchronous Delta-Sigma Modulator in 130-nm Digital CMOS Process.
Gustavo Della CollettaLuis Henrique de Carvalho FerreiraSameer R. SonkusaleGiseli V. RochaPublished in: IEEE Trans. Very Large Scale Integr. Syst. (2017)