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http://dx.doi.org/10.7471/ikeee.2022.26.2.299

Low-Power Sigma-Delta ADC for Sensor System  

Shin, Seung-Woo (Dept. of Electrical and Computer Engineering, University of Seoul)
Kwon, Ki-Baek (Dept. of Electrical and Computer Engineering, University of Seoul)
Park, Sang-Soon (Dept. of Electrical and Computer Engineering, University of Seoul)
Choi, Joogho (Dept. of Electrical and Computer Engineering, University of Seoul)
Publication Information
Journal of IKEEE / v.26, no.2, 2022 , pp. 299-305 More about this Journal
Abstract
Analog-digital converter (ADC) should be one of the most important blocks that convert various physical signals to digital ones for signal processing in the digital signal domain. As most operations of the analog circuit for sensor signal processing have been replaced by digital circuits, high-resolution performance is required for ADC. In addition, low-power must be the critical issue in order to extend the battery time of mobile system. The existing integrating sigma-delta ADCs has a characteristic of high resolution, but due to its low supply voltage condition and advanced technology, circuit error and corresponding resolution degradation of ADC result from the finite gain of the operational amplifier in the integrator. Buffer compensation technique can be applied to minimize gain errors, but there is a disadvantage of additional power dissipation due to the added buffer. In this paper, incremental signal-delta ADC is proposed with buffer switching scheme to minimize current and igh-pass bias circuit to improve the settling time.
Keywords
sigma-delta; gain error compensation; sensor signal processing; buffer; settling time;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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