微電子學(16)回授的頻率響應與穩定性

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· 林昀微電子學 Book 16 · 林漢賓
Ebook
156
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回授放大器對於高頻雜訊干擾應有防護,故穩定度會涉及高頻響應分析,本章將先從一階回授的頻率響應來論起,再研究二階回授,擴至三階回授。關於回授穩定度分析,常以圖示來說明,例如根軌跡、尼奎斯特圖、波德圖頻譜等,並以增益邊限或相位邊限來表示穩定度。對於特定的相位邊限,常採簡易設計。最後,研究各種頻率補償方式,當中以米勒補償法最為重要。

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