The aim is to design a single ended High DC gain Folded Cascode Opamp for LDO or Bandgap Reference. This Opamp can be used for LDO or Bandgap Reference.
>70 dB DC gain
>60 Degree Phase Margin
Power Consumption < 10mW
Unity Gain Bandwidth > 10MHz
VDD = 1.8 V
I designed similar Single ended Folded Cascode with 65nm TSMC process and 22FDX Global Foundaries FDSOI process. This opamp can be implemened another blocks such as LDO or Bandgap.
 Lee Cha Sing, N. A., Isa, M. M., & Musa, F. A. S. (2020). Design and analysis of folded cascode operational amplifier using 0.13 µm CMOS technology. In AIP CONFERENCE PROCEEDINGS.
 Gupta, H., Mishra, G. K., Rizvi, N. Z., & Patnaik, S. K. (2016, March). Design of high PSRR folded cascode operational amplifier for LDO applications. In 2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT) (pp. 4617-4621). IEEE.
 Kaushik, R., & Kaur, J. (2021). Design of folded cascode op amp and its application–bandgap reference circuit. Circuit World.
A single ended folded cascode which has a high DC gain (>70 dB) will be designed for LDO or Bandgap Reference.
Folded Cascode Opamp