电流反馈放大器稳定性分析.pdf
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Stability Analysis of Current
Feedback Amplifiers
National Semiconductor Corporation
电流反馈放大器稳定性分析
美国国家半导体公司
Stability Analysis of Current Feedback Amplifiers
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模拟技术大学栏目。
西南科技大学（SWUST ）
江海波（NE5532 ）
2004-7
电流反馈放大器稳定性分析
目录：
1. Introduction4
2. Stability Review 5
3. Review of Bode Analysis 6
4. A Better Model 7
5. Mathematical Justification8
6. Open Loop Transimpedance Plot12
7. Including Z(s) 16
8. External Parasites and Complex Loads18
9. Summary 20
Stability Analysis of Current Feedback Amplifiers
1. Introduction
概述：
High frequency current-feedback amplifiers (CFA) are finding a wide
acceptance in more complicated applications from dc to high bandwidths.
Often the applications involve amplifying signals in simple resistive networks
for which the data sheets provide adequate information to complete the task.
Too often the CFA application involves amplifying signals that have a complex
load or parasitic components at the external nodes that creates stability
problems. This application note covers the discussion of using Bode analysis
to determine the gain and phase margin while including external parameters. It
discusses how to determine the input buffer gain and its effect on the
closed-loop gain. A more appropriate mathematical model is developed for a
clearer understanding of the poles and zer
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