Design and characterization of a low-power bulk-driven two-stage OTA in 65nm, 90nm, and 130nm CMOS technologies for 0.4V-0.6V biomedical applications

Author

• Raihan Khan Akash

Date of Award

2026

Document Type

Thesis

Degree Name

Master of Science in Engineering (MSE)

Department

Electrical and Computer Engineering

Committee Chair

Laurie Joiner

Committee Member

Jonathan Blakely

Research Advisor

Laurie Joiner, Aubrey N. Beal

Subject(s)

Medical electronics, Low voltage systems, Complementary metal oxide semiconductors, Amplifiers (Electronics)

Abstract

Biomedical instrumentation requires low-power amplifiers to maximize battery life. Due to threshold voltage limitations, standard gate-driven operational transconductance amplifiers (OTAs) require higher supply voltages. To overcome this, a differential bulk-driven two-stage OTA is introduced for low-power applications. The proposed topology is implemented in 65nm, 90nm, and 130nm complementary metal-oxide-semiconductor (CMOS), with supply voltages ranging from 0.4V to 0.6V. Key metrics such as DC gain, gain-bandwidth product (GBWP), phase margin, common-mode rejection ratio (CMRR), slew rate, power, and noise are measured. The analysis confirms the robustness of the low-power solution provided by the proposed topology.

Comments

Design and characterization of a low-power bulk-driven two-stage Operational Transconductance Amplifier (OTA) in 65nm, 90nm, and 130nm CMOS technologies for 0.4V-0.6V biomedical applications

Recommended Citation

Akash, Raihan Khan, "Design and characterization of a low-power bulk-driven two-stage OTA in 65nm, 90nm, and 130nm CMOS technologies for 0.4V-0.6V biomedical applications" (2026). Theses. 851.
https://louis.uah.edu/uah-theses/851