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Conference Paper Loop Stability Compensation Technique for Continuous-Time Common-Mode Feedback Circuits
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Authors
Young-Kyun Cho, Bong Hyuk Park
Issue Date
2015-11
Citation
International SoC Design Conference (ISOCC) 2015, pp.241-242
Publisher
IEEE
Language
English
Type
Conference Paper
DOI
https://dx.doi.org/10.1109/ISOCC.2015.7401737
Abstract
A loop stability compensation technique for continuous-time common-mode feedback (CMFB) circuits is presented. A Miller capacitor and nulling resistor in the compensation network provide a reliable and stable operation of the fully-differential operational amplifier without any performance degradation. The amplifier is designed in a 130 nm CMOS technology, achieves simulated performance of 57 dB open loop DC gain, 1.3-GHz unity-gain frequency and 65째 phase margin. Also, the loop gain, bandwidth and phase margin of the CMFB are 51 dB, 27 MHz, and 76째, respectively.
KSP Keywords
130 nm, CMOS Technology, Common Mode Feedback(CMFB), Continuous-Time, DC gain, Feedback Circuit, Loop stability, Miller Capacitor, Operational Amplifier, Phase margin, Stable operation