Title :
Low-noise transimpedance amplifier designg procedure for optical communications
Author :
Shahdoost, Shahab ; Bozorgzadeh, Bardia ; Medi, Ali ; Saniei, Namdar
Author_Institution :
EECS Dept., Case Western Reserve Univ., Cleveland, OH, USA
Abstract :
Here, we report on design and measurement results of a state of the art low-noise and high-gain transimpedance amplifier (TIA) implemented in 0.18 μm TSMC CMOS technology. In depth design methodology for design of high gain and low noise TIA for 2.5 Gb/s optical communication family is presented. A novel noiseless capacitive feedback is proposed and implemented as a noise efficient feedback for TIA circuits. Besides, analytical noise calculations in this family of TIA circuits are presented and optimum noise criteria are derived. The saturation and instability problem of TIA circuits resulted from DC dark current of the input photodiodes (PDs) is addressed and a circuit-level solution is proposed. The measurement results of 0.18 μm chip shows bandwidth of 52 kHz to 1.62 GHz, and transimpedance gain of 75.5 dBΩ while dissipating 26.3 mW from a 2.2 V power supply, including the output buffer. Taking advantage of proposed capacitive feedback network and optimum noise criteria, noise measurement results show average input referred current noise of 3.18 pA/√Hz for this TIA in the bandwidth of operation.
Keywords :
CMOS integrated circuits; operational amplifiers; optical communication equipment; photodiodes; DC dark current; TIA circuits; TSMC CMOS technology; bandwidth 52 kHz to 1.62 GHz; bit rate 2.5 Gbit/s; capacitive feedback network; circuit-level solution; high-gain transimpedance amplifier; low-noise transimpedance amplifier design procedure; noise efficient feedback; noise measurement; noiseless capacitive feedback; optical communications; optimum noise criteria; output buffer; photodiodes; power 26.3 mW; size 0.18 mum; transimpedance gain; voltage 2.2 V; Bandwidth; CMOS integrated circuits; Noise; Optical fiber amplifiers; Optical fiber communication; Topology; Transistors; Current-input circuits; low-noise circuits; optical communications; transimpedance amplifiers;
Conference_Titel :
Microelectronics (Austrochip), 22nd Austrian Workshop on
Conference_Location :
Graz
Print_ISBN :
978-1-4799-7243-2
DOI :
10.1109/Austrochip.2014.6946323
