文章基本信息

标题：Research of High-Speed and Stable Photodetector of Monolithic Optocoupler Chip
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作者：Lei Tian ; Xinquan Lai
期刊名称：International Journal of Signal Processing, Image Processing and Pattern Recognition
印刷版ISSN：2005-4254
出版年度：2014
卷号：7
期号：2
页码：177-186
DOI：10.14257/ijsip.2014.7.2.17
出版社：SERSC
摘要：Designed and fabricated a monolithically integrated high-speed optical receiver module optocoupler chip, which contains "N well -P epitaxial -P sub " model for the photoelectric detector (PD), the transimpedance amplifier (TIA) and the subsequent processing circuits. Clarify the circuit structure of the TIA and the adjustable gain theory. Detailed analysis the frequency response of the PD models and simulated the PD theoretical analysis. Simulation results showed that when the temperature is constant and the photocurrent change from 5uA to 80uA, the response speed of the PD and TIA module change quickly. When the photocurrent (I ph ) unchanged and the test temperature (T) change from -25 ℃ to 125 ℃ , the delay time does not exceed 10ns. Tape-out with the 1P3M 0.35um BCD process and the test results showed when the T is 25 ℃ and the I ph is 20uA, the delay time of the whole chip are 155ns and 205ns. When the T is125 ℃ and the I ph h kept constant, the delay time of the whole chip are 153ns and 220ns.The results show that the photodetector design with high-speed response capability, combined with the TIA gain adjusted in real time, the high-speed monolithic integration optocouplers can be established.
关键词：photodetector; optocoupler; TIA; response time