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Sallen and Key Filter 14.4. Unity Gain Sallen and Key Filter.

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Presentation on theme: "Sallen and Key Filter 14.4. Unity Gain Sallen and Key Filter."— Presentation transcript:

1 Sallen and Key Filter 14.4

2 Unity Gain Sallen and Key Filter

3 SK Filter with Gain more than 1

4 R1=R2, C1=C2

5 Sensitivity of ω n

6 Sensitivity of Q

7 R2/R1=1, C2/C1=1, K=1 Q Q↑→Increased sensitivity to component variations

8 Q=2, C2/C1=1, R2/R1=1 K K↑→Increased sensitivity of Q to K increases

9 Q=2, C2/C1=1, K=2 R2/R

10 Q=2, R2/R1=1, K=2 C2/C

11 Summary SK filter shows more sensitivity to component variation as Q increases Low R2/R1 & C2/C1 leads to less sensitivy due to R1, R2, C1 and C2, but more sensitivity to K.


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