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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
- 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.