A comparative study on ASIC design of high frequency low power photoreceiver using 0.15µm CMOS technology

Abstract

The current work focuses on the design of a fully integrated single beam photoreceiver that can accept optical pulses of 850nm wavelength at a bandwidth as high as 1Gbps. This is highly suitable for implementation in fiber optic LANs and short haul optical interconnects. The recent advances of fiber optic communication technology with VLSI circuit design methodologies has motivated the development of low power complementary metal oxide semiconductor (CMOS) photoreceiver capable of detecting optical pulses at 1Gbps. The receiver integrates a photo-detector and a preamplifier circuit. The idea of using the CMOS technology is to achieve a high frequency low power implementation of the system. The average power dissipation of the receiver has been found earlier to be less than 0.105mW at a supply voltage of 1V for 0.3 µm CMOS technology. The current work has been done using the 0.15µm CMOS technology with power dissipation as low as. Also, a comparative study of frequency response of the receiver circuit has been made for different values of junction resistance and capacitance of the p-i-n photodiode. The whole work has been done using TSPICE simulation tool.