Title :
1.25-Gb/s CMOS front-end amplifier for optical receiver
Author :
Rui, Zheng ; Zhiqun, Li ; Zhigong, Wang ; Jun, Feng ; Mingzhen, Xiong
Author_Institution :
Inst. of RF- & OE- ICs, Southeast Univ., Nanjing, China
Abstract :
This paper presents a front-end amplifier for 1.25 Gbit/s optical receiver applications, realized in 0.18 μm CMOS technology. The circuit consists of a transimpedance amplifier followed by a limiting amplifier based on improved Cherry-Hooper structure. It is designed for a relatively large integrated-photodiode capacitance, approximately 1500 fF and fed from a single 1.8 V power supply. The power consumption of the circuit is 68 mW. The equivalent input noise current spectral density is 12 pA/√Hz at 1 GHz while the whole transimpedance gain achieves 114 dBΩ. A clear output eye-diagram is obtained with an input voltage 1 mV at 1.25 Gbit/s.
Keywords :
CMOS analogue integrated circuits; amplifiers; high-speed integrated circuits; limiters; optical receivers; photodiodes; 0.18 micron; 1 GHz; 1 mV; 1.25 Gbit/s; 1.8 V; 68 mW; CMOS front-end amplifier; Cherry-Hooper structure; integrated-photodiode capacitance; limiting amplifier; optical receiver applications; transimpedance amplifier; CMOS technology; Capacitance; Circuit noise; Energy consumption; Integrated circuit technology; Optical amplifiers; Optical receivers; Power supplies; Semiconductor optical amplifiers; Voltage;
Conference_Titel :
Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings
Print_ISBN :
0-7803-9433-X
DOI :
10.1109/APMC.2005.1606602
