Description:

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.

Design Goals:

>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. 

Block Diagram:

Schematics:

References:

[1] 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.

[2] 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.

[3] Kaushik, R., & Kaur, J. (2021). Design of folded cascode op amp and its application–bandgap reference circuit. Circuit World.

Team Members:

Alper Kurt