Self-Linearized Current Feedback amplifier

Current feedback amplifiers are used widely in industrial and consumer markets, mostly for sensing interface and amplification. To obtain high input impedance, the amplifier often interface the sensor with a differential pair directly. And to improve power efficiency, the input differential pair is often biased at weak inversion. Doing so, however, also result in low input linear range (<100mV), which limits its use case.

The Project Goal:

In this project, a novel self-linearization technique will be explored to linearize the  differential pair biased in weak inversion.

Assignment

Literature Review: Understand the working principle of current feedback amplifier, as well as the nonlinearity mechanism in a differential pair.

Architecture Exploration: Propose an IC techniques to linearize a differential pair biased in weak inversion.

Circuit Implementation: Design the a current feedback amplifier in a modern CMOS process (e.g., 180nm or 65nm).

Verification: Perform extensive post-layout simulations to ensure robustness against process variations (PVT).

Tapeout : If the design meets performance criteria, the student will be supported through the chip fabrication process.

Requirements

You are an ambitious master student with good analog circuit design knowledge and high motivation. You should have obtained good grades from the following courses: Measurement and instrumentation, Analog circuit design fundamentals, CMOS I/II.

Contact

Last modified: 2026-02-04