A Digitally Controlled Op-Amp with Level-Crossing-Based Approximation and its Application to a 10-bit Pipeline ADC
SCIE
SCOPUS
- Title
- A Digitally Controlled Op-Amp with Level-Crossing-Based Approximation and its Application to a 10-bit Pipeline ADC
- Authors
- Dong Woo Jee; Yunjae Suh; Park, HJ; Sim, JY
- Date Issued
- 2016-12
- Publisher
- IEEK PUBLICATION CENTER
- Abstract
- A digitally controlled operational amplifier (op-amp) with level-crossing-based approximation is proposed. A high gain is effectively obtained by means of a damping control without a stability problem occurring in the multiple gain stages. Compared to the previous version of the zero-crossing-based algorithmic approximation, the proposed scheme further improves the settling time with the class AB operation obtained by switching of multiple driving paths. For verification, the designed op-amp is applied to a 10-bit pipeline ADC and implemented in a 0.18 mu m CMOS technology. Measured results show that the designed op-amp successfully operates at 10-bit resolution, 10 MSample/s pipeline ADC and achieves an effective gain of more than 60 dB.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/37157
- DOI
- 10.1142/S0218126616501553
- ISSN
- 0218-1266
- Article Type
- Article
- Citation
- Journal of Circuits, Systems and Computers (JSTS), vol. 25, no. 12, 2016-12
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