光無線通訊之電路與系統

Circuits and System of Optical Wireless Communication

鄭慶一(Ching-I Cheng)

指導教授 ： 洪君維

中原大學/工學院/電子工程研究所/碩士(2002年)

https://doi.org/10.6840/cycu200200323

摘要

摘要
本論文主要目的是探討轉阻抗放大器的穩定問題及雜訊分析，並提出一個能拒斥較大低頻電流的前級放大器架構。在論文的探討中可以發現，轉阻抗放大器的頻寬與回授電阻及光二極體的電容有關。穩定度與所用的放大器3dB頻寬及回授電阻有關。而TIA的主要雜訊源與輸入端電容的大小及頻率有著密切的關係。
採用TSMC1P4M.35um製程，經由計算及HSPICE模擬發現，本論文所提出的架構，可以實現增益為20KΩ的轉阻抗放大器，其3dB頻寬為60MHz，其Q值小於(0.5)^(1/2)並能忍受2mA的直流電流與1mA的訊號電流。

關鍵字

轉阻抗放大器 ； 前級放大器 ； 光二極體

並列摘要

Abstract

The major objective of this thesis is to discuss the stability problem and the noise analysis of transimpedance amplifier. This thesis propose a architecture which can reject a large low frequency current. The bandwidth of the transimpedance amplifier is depended on the feedback resistance and the capacitance of the photodiode. The stability issue is based on the feedback resistance and the 3db bandwidth of the amplifier which was used in the transimpedance amplifier. By the way, the major noise source is related with the capacitance of the input stage and the frequency.
According to the calculation and the HSPICE simulation based on TSMC1P4M.35um process, the architecture of the transimpedance amplifier proposed in this thesis can reach the 3dB bandwidth up to 60MHz while Q factor is less than (0.5)^(1/2) and it can be tolerated the DC current and the signal current as large as 2mA and 1mA respectively.

並列關鍵字

photodiode ； preamp ； transimpedance amplifier

參考文獻

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