MODELING AND PERFORMANCE ANALYSIS OF HIGH BANDWIDTH TRANSIMPEDANCE AMPLIFIERS IN OPTICAL COMMUNICATIONS

Year 2024, Volume: 25 Issue: 4, 567 - 589, 27.12.2024

Berkay Çavuş , Şekip Esat Hayber

https://doi.org/10.18038/estubtda.1502339

Abstract

This study aims to optimize the performance of optical communication and sensing systems using avalanche photodiodes (APD) and transimpedance amplifiers (TIA). The high gain of APDs at low light levels and TIA circuits’ wide bandwidth, low noise, and high-speed characteristics are critical for these applications. In the design process, a T feedback network and various operational amplifiers were used to enhance the performance of the TIA circuit. LTspice simulations examined the effects of white noise on the circuit’s current and output voltage and the noise performance under various noise divider values. The impact of changes due to laser distance and dark current were also analyzed. These analyses reveal how the TIA circuit achieves high performance in different applications and demonstrates the effectiveness of noise reduction techniques. The results provide significant insights into the design of TIA circuits used in optical communication and sensing systems.

Keywords

Transimpedance amplifier (TIA), Avalanche photodiodes (APD), Optical communication, Sensing systems, T feedback network

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