4.1 mW 50 dBΩ 10 Gbps transimpedance amplifier for optical receivers in 0.13 μm CMOS

• Published in: Microwave and optical technology letters Vol. 53; no. 2; pp. 448 - 451
• Main Authors: Ngo, Trong-Hieu, Lee, Tae-Woo, Park, Hyo-Hoon
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.02.2011
• Subjects: broadband matching network; optical receiver; regulated-cascode input; shunt-feedback topology; transimpedance amplifier
• ISSN: 0895-2477; 1098-2760
• DOI: 10.1002/mop.25741

A transimpedance amplifier (TIA), using the combination of the shunt‐feedback topology with the regulated‐cascode input stage and broadband matching network, is designed and implemented in a 0.13‐μm CMOS technology. The proposed TIA achieves a 3‐dB bandwidth of 7.5 GHz, transimpedance gain of 50 dBΩ in the presence of 300 fF photodiode capacitance. It dissipates 4.1 mW from a 1.2 V supply voltage, and occupies a chip area without pads of 0.42 × 0.17 mm2. The TIA presents the highest gain‐bandwidth product per DC power figure of merit of 578 GHz Ω/mW compared with recently published TIAs. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:448–451, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25741