Design Methodology For Low-noise Cmos Transimpedance Amplifiers Based On Shunt-shunt Feedback Topology

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)The regulated cascode (RGC) is a widely used topology in transimpedance amplifiers projects. Although it is efficient with respect to power consumption and bandwidth, the regulated cascode presents high input-referred current noise levels that hinder the use of this topology in long distance optical networks. In this paper is proposed a design methodology for CMOS transimpedance amplifiers based on shunt-shunt feedback topology to achieve a broad-band response with low input referred current noise. A complete analysis of the shunt-shunt amplifier is presented. Experimental results shown a 51 dB Omega transimpedance gain and a 10.54 GHz bandwidth. The achieved average input referred current noise equals to 6. 8 pA/root(Hz), the lowest one between other state-of-art CMOS designs. The circuit was manufactured in 130 nm RF CMOS technology.Brazilian Research National Council (CNPq)FAPESPCITAR ProjectFINEPConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)29th Symposium on Integrated Circuits and Systems Design (SBCCI)AUG 29-SEP 03, 2016Belo Horizonte, BRAZI