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Contents* W: K3 e: C# z/ L, F6 N
1 Introduction .................................................................................................................................. 36 v: ~/ F2 ~% ^' z
1.1 Split Supply vs Single Supply.................................................................................................... 34 H1 S2 [0 ^7 k. S! h3 R
1.2 Virtual Ground.......................................................................................................................... 4
$ }7 r/ q" P. G4 m1.3 AC-Coupling ............................................................................................................................. 4
! m/ ] y* S! W* g1 R1 x, {1.4 Combining Op-Amp Stages ...................................................................................................... 5
6 \6 Y8 ]( g8 W g$ n+ x- A1.5 Selecting Resistor and Capacitor Values .................................................................................. 5
8 V% W2 M7 t" J+ A6 S. L2 Basic Circuits ............................................................................................................................... 5
% ^ a5 a, ^ p; W1 y3 q. P2.1 Gain......................................................................................................................................... 5) @' w0 o% R% t0 L5 d5 b! V) c
2.2 Attenuation ............................................................................................................................... 6% i% K& L( N3 o2 N
2.3 Summing ................................................................................................................................. 9
) O8 @' W$ X2 `, B( w2.4 Difference Amplifier .................................................................................................................. 9$ K7 A `3 ^ t1 N
2.5 Simulated Inductor.................................................................................................................... 9, ~. l& N! o1 ]9 } D
2.6 Instrumentation Amplifiers ...................................................................................................... 10! J; i9 t( k! D" ?7 S
3 Filter Circuits ............................................................................................................................... 12$ x, ~0 h/ y5 B3 T/ r
3.1 Single Pole Circuits................................................................................................................. 13
% T3 B/ M: e! e; E! |3.1.1 Low Pass Filter Circuits .............................................................................................................13
# j. j0 H8 m0 g/ X |. X$ S3.1.2 High Pass Filter Circuits.............................................................................................................132 v0 e6 O' `9 |) |0 ^
3.1.3 All-Pass Filter ............................................................................................................................14: }% q$ \+ X3 y3 |3 N& N3 z
3.2 Double-Pole Circuits ............................................................................................................... 15
- S7 ^* Z% F2 J- D8 e; K6 L# m* ^3.2.1 Sallen-Key................................................................................................................................15
, \% A" `* A6 v: Z3.2.2 Multiple Feedback (MFB)...........................................................................................................16
" \7 q$ l8 J$ }: e( h: g3.2.3 Twin T ......................................................................................................................................17
( |# Z1 ^3 H* R$ X3.2.4 Fliege .......................................................................................................................................209 h1 w4 L! J8 [' Z5 p6 q
3.2.5 Akerberg-Mossberg Filter ..........................................................................................................22% z2 [; l1 i/ a& c, \2 |# [6 m8 ~
3.2.6 BiQuad .....................................................................................................................................24; ?. c" q1 r7 C, N8 |: ^/ f
3.2.7 State Variable...........................................................................................................................25
) D6 n) h& J- G# r$ T" x, p) |4 References.................................................................................................................................. 25
0 K9 Y$ i! F1 wAppendix A – Standard Resistor and Capacitor Values ................................................................. 26
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pdf 附件如後: 27頁9 }% }' f$ E. J0 H; i+ f
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[ 本帖最後由 sjhor 於 2007-5-11 10:12 PM 編輯 ] |
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