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http://dx.doi.org/10.7471/ikeee.2018.22.3.786

A 1.2V 90dB CIFB Sigma-Delta Analog Modulator for Low-power Sensor Interface  

Park, Jin-Woo (Department of Electronics Engineering, Kumoh National Institute of Technology)
Jang, Young-Chan (Department of Electronics Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of IKEEE / v.22, no.3, 2018 , pp. 786-792 More about this Journal
Abstract
A third-order sigma-delta modulator with the architecture of cascade of integrator feedback (CIFB) is proposed for an analog-digital converter used in low-power sensor interfaces. It consists of three switched-capacitor integrators using a gain-enhanced current-mirror-based amplifier, a single-bit comparator, and a non-overlapped clock generator. The proposed sigma-delta analog modulator with over-sampling ratio of 160 and maximum SNR of 90.45 dB is implemented using $0.11-{\mu}m$ CMOS process with 1.2-V supply voltage. The area and power consumption of the sigma-delta analog modulator are $0.145mm^2$ and $341{\mu}W$, respectively.
Keywords
sigma-delta modulator; cascade of integrator feedback; gain-enhanced current-mirror-based amplifier; analog-to-digital converter; comparator;
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