光电二极管放大电路的SPICE仿真与实验研究

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中图分类号：TN248.4-34 文献标识码：A 文章编号：1004-373X（2025）16-0019-06

SPICE simulation and experimental study of photodiodeamplification

CONG Menglong，ZHOU Kunpeng （CollgeofPhysicsandElectronic Information，Inner MongoliaMinzu University，TongliaoO28Oo，China）

Abstract：Inorder tointegrallyimprove theperformance of photodiodeamplificationcircuits，thedesignschemeis optimizedbasedontheoreticalresearchandbycombingthesoftwaresimulationwiththeexperimentaltesting.Fromthe perspectiveofsystemtransferfunction，thecauseofcircuitoscllationisrevealed，whichisthespecificamplitudeandphase relationshipbetweenopen-lopgainandfedbackfactor.Onthisbasis，theocilationconditionsareexplainedintuitively nthe graphical manner bymeansof TINA SPICEACandtransient simulation，and the loopgain Bode plot measured fordiferent fedback capacitorvalues usedforphasecompensation，as wellas thefrequencyresponse，stepresponse andimpulseresponseof the system，areprovided.Bycomparing theabove simulationresults，theimpactof feedback capacitancevaluesonsystem stabilityandbandwidthisdiscussed，andtheidealvalueiscalculatedbyconsideringthestabilityndbandwidthInalsionto theproblemof diicultiplementationinapplicationsduetoxceivelysallcapacitanevalues，astrategyofequivalentsall capacitanceusingT-shapedresistiveapacitiveetworkisproposed，whichisverifiedbythesimulation.Theexperimentaltsting isconductedonthephasemarginand bandwidthof thesystem.Theresultsshowthatwhenthecompensationcapacitoris5pF， the phase margin is about 68.4∘ ，the overshoot isless than 8% ，and no ringing phenomenon is observed.

Keywords：photodiode;open-loop gain; TINA SPICE; feedback factor; loop gain; phase margin

0 引言

光电探测器[1-3]是一种将光信号转换为电信号的传感器，其核心原理是光与物质的相互作用，即辐射引起被照射材料电导率变化。（剩余7510字）