A low power wideband differential transimpedance amplifier for optical receivers in 0.18-μm CMOS

• Main Authors: Seng, Chong Whye., Sern, Tan Yung., Seng, Yeo Kiat.
• Other Authors: School of Electrical and Electronic Engineering
• Format: Conference or Workshop Item
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Electrical and electronic engineering
• Online Access: https://hdl.handle.net/10356/103574; http://hdl.handle.net/10220/16735; http://ieeexplore.ieee.org.ezlibproxy1.ntu.edu.sg/xpl/login.jsp?tp=&arnumber=6573594&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6573594
• Institution: Nanyang Technological University

This paper presents a low power wideband differential TIA for optical receivers. The wideband operation is achieved by modifying a conventional regulated cascode input stage and combining it with a feedback amplifier in a 0.18μm CMOS process. The post-layout simulation results show that the proposed TIA has a bandwidth of 4.5 GHz, average input referred noise current spectral density of 13.7 pA/sqrtHz from DC to 7 GHz, and transimpedance gain of 64.8 dBO. The proposed TIA dissipates only 3.5 mW with a 1.8 V power supply. The core circuit occupies a chip area of 97 μm × 53 μm.