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Contents
) k4 @, B, t8 D' z6 J+ v1 Introduction .................................................................................................................................. 3
* i( S$ A6 N1 L* H6 a8 |1.1 Split Supply vs Single Supply.................................................................................................... 3 C1 u7 T4 O( P+ ~
1.2 Virtual Ground.......................................................................................................................... 4
6 [6 q& \% n. r5 m# x1.3 AC-Coupling ............................................................................................................................. 4
/ Y( Z% g- e9 g! o1 S7 e4 W2 M1.4 Combining Op-Amp Stages ...................................................................................................... 5, q/ W% b, w( a V
1.5 Selecting Resistor and Capacitor Values .................................................................................. 5
* T5 v8 m+ E2 M* i" k _6 W2 Basic Circuits ............................................................................................................................... 5
+ j- v) Q6 `2 ?- _4 r2.1 Gain......................................................................................................................................... 5
8 D# J3 j( U3 c2 t$ F# A2.2 Attenuation ............................................................................................................................... 6
/ G, ^4 w0 T3 y9 c: A2 S& S. C6 h2.3 Summing ................................................................................................................................. 9" Q2 e1 K3 h' B+ s7 G& |* q* @7 Y
2.4 Difference Amplifier .................................................................................................................. 9
: p0 m w. A1 | t }2.5 Simulated Inductor.................................................................................................................... 9& b) G$ ~' D' `5 X: w3 T
2.6 Instrumentation Amplifiers ...................................................................................................... 10
' U* k( v) @# w9 z1 `7 Q: d3 Filter Circuits ............................................................................................................................... 12
# Y5 \ F$ x* x3.1 Single Pole Circuits................................................................................................................. 13 c8 u/ \) U% g! B3 H% d; o
3.1.1 Low Pass Filter Circuits .............................................................................................................13
2 ]9 A6 D5 R! X6 ]) ]& J; ~" E# \* [3.1.2 High Pass Filter Circuits.............................................................................................................13
* ]+ B2 t6 Y' R, g( Y; C& V3.1.3 All-Pass Filter ............................................................................................................................14, S0 d8 q. t8 [3 [0 T4 e
3.2 Double-Pole Circuits ............................................................................................................... 157 x& D7 A/ ]# m% F# f* V$ F. u# b: @
3.2.1 Sallen-Key................................................................................................................................15% m# l; s- Z' ~9 X3 D
3.2.2 Multiple Feedback (MFB)...........................................................................................................16
3 ~& @" `1 h( @+ e3.2.3 Twin T ......................................................................................................................................17; g' C# F8 K7 d
3.2.4 Fliege .......................................................................................................................................20) d9 T Q1 m* y; l' w. V: m8 [
3.2.5 Akerberg-Mossberg Filter ..........................................................................................................22
4 w3 a# z+ L/ H/ ^' c9 k' s3.2.6 BiQuad .....................................................................................................................................24; G% q7 m9 y6 U- A9 p6 X* S. E9 \
3.2.7 State Variable...........................................................................................................................25$ t3 Y, P2 d! g- Z
4 References.................................................................................................................................. 25
+ O, ]* G$ [7 g* p+ k3 tAppendix A – Standard Resistor and Capacitor Values ................................................................. 26
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1 ~+ Y& A/ n- X D X1 `( t* _& {& | V* e4 |4 w# Q" f# H
pdf 附件如後: 27頁
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$ Y6 Q1 l1 |; F[ 本帖最後由 sjhor 於 2007-5-11 10:12 PM 編輯 ] |
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