现代电子技术2025，Vol.48Issue(16)：19-24,6.DOI:10.16652/j.issn.1004-373x.2025.16.004
光电二极管放大电路的SPICE仿真与实验研究
SPICE simulation and experimental study of photodiode amplification
摘要
Abstract
In order to integrally improve the performance of photodiode amplification circuits,the design scheme is optimized based on theoretical research and by combing the software simulation with the experimental testing.From the perspective of system transfer function,the cause of circuit oscillation is revealed,which is the specific amplitude and phase relationship between open-loop gain and feedback factor.On this basis,the oscillation conditions are explained intuitively in the graphical manner by means of TINA SPICE AC and transient simulation,and the loop gain Bode plot measured for different feedback capacitor values used for phase compensation,as well as the frequency response,step response and impulse response of the system,are provided.By comparing the above simulation results,the impact of feedback capacitance values on system stability and bandwidth is discussed,and the ideal value is calculated by considering the stability and bandwidth.In allusion to the problem of difficult implementation in applications due to excessively small capacitance values,a strategy of equivalent small capacitance using T-shaped resistive capacitive network is proposed,which is verified by the simulation.The experimental testing is conducted on the phase margin and bandwidth of the system.The results show that when the compensation capacitor is 5 pF,the phase margin is about 68.4°,the overshoot is less than 8%,and no ringing phenomenon is observed.关键词
光电二极管/开环增益/TINA SPICE/反馈因子/环路增益/相位裕度Key words
photodiode/open-loop gain/TINA SPICE/feedback factor/loop gain/phase margin分类
信息技术与安全科学引用本文复制引用
丛梦龙,周昆鹏..光电二极管放大电路的SPICE仿真与实验研究[J].现代电子技术,2025,48(16):19-24,6.基金项目
国家自然科学基金项目(62463023) （62463023）
