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A Continuous-Time Zoom ADC for Low-Power Audio Applications
IEEE Journal of Solid-State Circuits
This paper presents a continuous-time zoom ADC for audio applications. It employs a high-speed asynchronous SAR ADC that dynamically updates the references of a continuoustime delta-sigma modulator (CTDSM). Compared to previous switched-capacitor (SC) zoom ADCs, its input impedance is essentially resistive, which relaxes the power dissipation of its reference and input buffers. Fabricated in a 160 nm CMOS process, the ADC occupies 0.27 mm 2 and achieves 108.1 dB peak SNR, 106.4 dB peak SNDR anddoi:10.1109/jssc.2019.2959480 fatcat:jecqzh5ihzfltir3aoo42zxhqu