Design of Front-end Amplifiers of Optical and Wireless Communication Systems

• Main Authors: Tsung-Liang Lin, 林宗良
• Other Authors: Huei Wang
• Format: Others
• Language: en_US
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/00412286205957360074

碩士 === 國立臺灣大學 === 電信工程學研究所 === 92 === The main topics of this thesis are introducing optical and wireless communication systems and designing the front-end amplifiers of the receivers. First, the design motivation, the results of paper survey, and brief description of the structures of TIA and VGLNA are introduced. Then introductions of circuit blocks of the transceivers in each communication system and some basic concepts are given. Operation principles, performance parameters and trade offs are discussed. The basic concept of noise figure is also presented. Finally, the design procedures of LNA are given. In the design of the TIA, two bandwidth-enhancing techniques are used. The TIA achieves a gain of 53 dBΩ with a bandwidth of 9 GHz. In the design of the VGLNA, input matching network is implemented off chip to reduce chip area. The measured gain is 6 dB and noise figure is 5 dB in high gain mode. In low gain mode, the measured results shows a gain of –12 dB and a noise figure of 13 dB.