A 678-µW Frequency-Modulation-Based ADC With 104-dB Dynamic Range in 44-kHz Bandwidth. - Julian Warchall; Shiva Kaleru; Nidhi Jayapalan; Bijoor Nayak; Harinath Garudadri; Patrick P. Mercier (IEEE Trans. Circuits Syst. II Express Briefs, 2018)