跨阻型放大器应用指南

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1、ApplicationReportZHCA479–September2012跨阻型放大器应用指南毛华平德州仪器公司(TI)高速应用工程师摘要本文简要介绍了Decompensate型跨阻型放大器的应用常见问题.Abstract:thisarticlesimplyintroducethenormalapplicationofunitygainstableTIAanddecompensatedTIA,andthenormalissuemetintherealapplication.Keywords:GBP(Gainband

2、widthproduct),decompensated,stability,noise,CF(feedbackcapacitor),overshoot.Contents1引言..................................................................................................................................22TIA应用概论...................................

3、..................................................................................23TIA应用指标分析..............................................................................................................33.1带宽计算33.2噪声计算64实际应用中的常见问题..............................

4、........................................................................64.1振荡64.2overshoot95总结..................................................................................................................................116.参考资料............................

5、...............................................................................................11FiguresFigure1decomp和单位增益稳定运放波特图....................................................................................2Figure2TIA光电检测电路...............................

6、...................................................................................3Figure3TIA用于DAC输出电流检测电路...........................................................................................3Figure4未补偿时的波特图...............................................

7、....................................................................4Figure5补偿后的波特图.......................................................................................................................5Figure6常用TIA增益与带宽关系.......................................

8、.................................................................6Figure7未加补偿的20k放大电路........................................................................................