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主動式積分器、微分器與濾波器

主動式積分器、微分器與濾波器. 主動式積分器、微分器. CCVS. i 1 ( t ). VCCS. i C ( t ). i 1 ( t ). i 2 ( t ).  C ( t ).  1 ( t ). r m i 1.  2 ( t ).  1 ( t ).  C ( t ). g m  1. C. i C. R.  C ( t ).  I ( t ).  I. R. C. i C.  O.  O. i I. 微分器. 積分器. Miller integrator.

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主動式積分器、微分器與濾波器

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  1. 主動式積分器、微分器與濾波器 主動式積分器、微分器 CCVS i1(t) VCCS iC(t) i1(t) i2(t) C(t) 1(t) rmi1 2(t) 1(t) C(t) gm 1 C iC R C(t) I(t) I R C iC O O iI 微分器 積分器 Miller integrator

  2. 有關Miller integrator 輸入訊號 RF Leakage current C iC C(t) I iI O R 不考慮RF的輸出訊號 通常會加一個大電阻提供DC的回授 例題 R=10kW，C=10nF，RF=1MW 考慮RF的輸出訊號 RF C=10ms Charging current iI=1V/10kW=0.1mA iI RF =0.1mA ·1MW=100V

  3. 主動式濾波器 簡易主動式濾波器 Z2 I Z1 O Inverting configuration Z2 Z1 O I Noninverting configuration I Z1 O Z2

  4. 例題 R2 C2 I R1 O A0 為一個有增益的低通濾波器

  5. 波德圖如下 |T| 20log(R2/R1) -20dB/dec logw wH ∠T 180° 135° 90° logw

  6. 例題 R2 I R1 C1 O A∞ 為一個有增益的高通濾波器 波德圖自行練習畫 討論 主動式與被動式濾波器各有何優缺點？

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