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Contents
' B- [" k7 g) ?3 Q, Y$ S# ^1 Introduction .................................................................................................................................. 3
* w7 U' g1 R/ K; O1.1 Split Supply vs Single Supply.................................................................................................... 3' `; ]7 r" u" }' P% @! {# q% f$ X7 I
1.2 Virtual Ground.......................................................................................................................... 4
& k( y/ u$ N+ Z, e. O: O) O1.3 AC-Coupling ............................................................................................................................. 4
d$ s. a( W$ F/ l1.4 Combining Op-Amp Stages ...................................................................................................... 55 s5 V. c8 V- a# G
1.5 Selecting Resistor and Capacitor Values .................................................................................. 5! K& e0 P; u. Z+ b
2 Basic Circuits ............................................................................................................................... 5! t, T% [. l* Z1 g2 \% Q% o
2.1 Gain......................................................................................................................................... 55 e7 ~4 v3 f3 l
2.2 Attenuation ............................................................................................................................... 63 ?8 w; s5 M6 A# x9 j, |7 y
2.3 Summing ................................................................................................................................. 9& O' C$ z4 M2 `7 P* A
2.4 Difference Amplifier .................................................................................................................. 9/ y3 D- U3 v1 ]
2.5 Simulated Inductor.................................................................................................................... 9
7 f; b6 p/ S: L# _, a$ _2.6 Instrumentation Amplifiers ...................................................................................................... 10$ ]- U" _, m$ X2 c5 a I
3 Filter Circuits ............................................................................................................................... 12) k+ ~ S5 f! Q% B w1 I; J% M
3.1 Single Pole Circuits................................................................................................................. 13; T: _1 y0 ]5 ~$ ? {
3.1.1 Low Pass Filter Circuits .............................................................................................................13; }7 F3 Z. D! W1 P. h+ M
3.1.2 High Pass Filter Circuits.............................................................................................................130 j, E* e/ } b" X6 V' R. k% A
3.1.3 All-Pass Filter ............................................................................................................................14
1 Z. p' ~$ P# o& P3.2 Double-Pole Circuits ............................................................................................................... 15
9 E5 q8 d7 x6 G' ^- t4 S! {3.2.1 Sallen-Key................................................................................................................................15, M: r2 ]+ s- }# H6 V
3.2.2 Multiple Feedback (MFB)...........................................................................................................16
% s% C5 Y3 D# r% {) N ?3.2.3 Twin T ......................................................................................................................................17
& R L! x$ l$ [. f- y3.2.4 Fliege .......................................................................................................................................20
4 j! P: A0 A/ ~0 A6 s. ~3.2.5 Akerberg-Mossberg Filter ..........................................................................................................22
, q D( r! ?& D7 f2 j3.2.6 BiQuad .....................................................................................................................................24
`% p0 y. d6 _# g% F( `3.2.7 State Variable...........................................................................................................................25# m) U C/ p1 L+ t( u
4 References.................................................................................................................................. 255 W% f# { A" l6 B a* [' i9 P% e
Appendix A – Standard Resistor and Capacitor Values ................................................................. 26
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4 {/ z9 M m$ x! c3 J' B4 `1 Updf 附件如後: 27頁* @1 g4 n1 y& Q4 {( R5 l
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3 t. @% ], o2 p$ y+ T; E! k) o[ 本帖最後由 sjhor 於 2007-5-11 10:12 PM 編輯 ] |
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