Analysis and Design of a 4th-order Feedforward Compensated Operational Amplifier
This paper presents the analysis and design of a 4th-order feedforward compensated operational amplifier for applications in continuous-time bandpass delta-sigma modulators. A new design method is proposed and analysed on the system level. Based on the proposed method, a 4th-order feedforward compensated operational amplifier is designed in a 65 nm CMOS process. With 400 fF capacitance load, the op amp consumes 10.8 mA from a supply voltage of 1.2 V. It is conditionally stable with a phase margin of 72.1 degrees and has gains of 64.6 dB, 40.0 dB and 11.5 dB at DC, 340 MHz and 1 GHz respectively.
Authors
- Dongbing Fu
- Jiangfeng Du (ORCID: https://orcid.org/0000-0002-1531-3558)
- Yongshuang Luo
- Ning Ning (ORCID: https://orcid.org/0000-0001-7893-1428)
- Youhua Wang (ORCID: https://orcid.org/0000-0002-4580-8172)
- Can Zhu (ORCID: https://orcid.org/0000-0001-5689-956X)
Institutions
- University of Electronic Science and Technology of China (CN)
Publication Details
- Published
- 2024-09-20
- DOI
- https://doi.org/10.1109/iccs62517.2024.10845984
- Primary Topic
- Analog and Mixed-Signal Circuit Design
- Type
- article
- Field-Weighted Citation Impact
- 0.00