Short-range optical communications with data rates above 56 Gb/s have drawn significant research efforts in recent years as conventional copper cables have become less competitive with respect to weight, energy efficiency, limited channel bandwidth, cross-talk, and electromagnetic interference (EMI).
As the first stage circuit block of the optical receiver, the transimpedance amplifier (TIA) determines the noise and bandwidth performance of an optoelectronic integrated circuit (OEIC). A suitable design of the TIA requires trade-offs among stability, transimpedance gain, noise, and bandwidth.
Different TIA topologies have been reported in recent years. As one of the mainstream TIA topologies, the regulated cascode (RGC) reduces the TIA input impedance by using local feedback at the expense of introducing extra noise. The Closed-loop TIAs using a common-source amplifier with inductive feedback and a complementary metal-oxide-semiconductor (CMOS) inverter amplifier with resistive feedback have also been adopted extensively.
This project is intended to guide the student to design a TIA used for short-range optical communications.
1. The student will study the principle of transimpedance amplifier design and do comprehensive literature reviews.
2. After that, the student will learn how to use different design tools to conduct the project.
3. Finally the student will design a transimpedance amplifier in TSMC 28-nm 1-V standard CMOS technology, and present it.
1. Literature review ability
2. Circuit design tools/simulation tools study
3. Basic circuits design and debug ability
4. Team-work spirit