A Bulk-Driven Low-Power CMOS Transimpedance Amplifier for 5 Gb/s Intra-Computer Optical Communications

This paper presents a bulk-driven low-power transimpedance amplifier (TIA) for 5 Gb/s intra-computer optical communications, implemented in 65-nm CMOS technology. The design utilizes a bulk-driven technique with shorted gate and bulk terminals to enhance the gain, along with a two-stage inverter-based amplifier with series feedback and tail-current capacitance for bandwidth extension. Measurement results demonstrate a 3.76 GHz bandwidth with 0.81 mW power consumption, achieving an 82% power reduction compared to conventional low-power TIAs.