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Contents
) R* J. A& ?, P3 Z- Z! f) t1 Introduction .................................................................................................................................. 3) p: X" Z6 p# P9 t- q( b
1.1 Split Supply vs Single Supply.................................................................................................... 3' |% b5 s, ? z4 T) o: b3 o
1.2 Virtual Ground.......................................................................................................................... 42 o$ m% j6 `$ o1 ]2 T" V9 A, L* \
1.3 AC-Coupling ............................................................................................................................. 4
' B, _" I; ?0 ~- u" {1.4 Combining Op-Amp Stages ...................................................................................................... 5
) w; g( P0 N8 P9 }! Z% \! ]- e& [1.5 Selecting Resistor and Capacitor Values .................................................................................. 5; X: l1 L/ t( w
2 Basic Circuits ............................................................................................................................... 5
! b0 _: ~3 {. _/ p" u+ N2.1 Gain......................................................................................................................................... 5
5 f4 a- y% K% p, F9 r h2.2 Attenuation ............................................................................................................................... 69 ~3 M8 Q$ W$ J0 P7 F
2.3 Summing ................................................................................................................................. 9' n7 U ` T& n. c. n4 m3 M' Y
2.4 Difference Amplifier .................................................................................................................. 9
0 ]& |# @- `& q S2.5 Simulated Inductor.................................................................................................................... 9
, I* \9 l# H+ l2.6 Instrumentation Amplifiers ...................................................................................................... 10
3 o0 @0 _1 j% }; p" S3 Filter Circuits ............................................................................................................................... 12
1 q& I, S3 @' Q/ ? N6 D3.1 Single Pole Circuits................................................................................................................. 13
" [$ ]& \- B2 ?: T8 l% z3.1.1 Low Pass Filter Circuits .............................................................................................................13) u+ N+ C; g, C
3.1.2 High Pass Filter Circuits.............................................................................................................132 T% L5 `% X( P: _, [/ u* R
3.1.3 All-Pass Filter ............................................................................................................................14* s$ P t; r$ L: R6 ^) f7 P! z# `
3.2 Double-Pole Circuits ............................................................................................................... 15
, M" S4 P; M6 z3.2.1 Sallen-Key................................................................................................................................15
" m N% p- P; P; I3.2.2 Multiple Feedback (MFB)...........................................................................................................16
. @/ z, k3 _5 s# b, y, q3.2.3 Twin T ......................................................................................................................................17
3 z3 D+ t$ r8 e$ s% }3.2.4 Fliege .......................................................................................................................................208 ~0 ^$ b4 x/ i
3.2.5 Akerberg-Mossberg Filter ..........................................................................................................22/ K; k: B. J5 `$ l9 ^* }4 R7 b
3.2.6 BiQuad .....................................................................................................................................24
- C+ |& X& M7 q, N3.2.7 State Variable...........................................................................................................................25
9 M7 H4 Q ]; _- C5 Y9 p2 Y4 References.................................................................................................................................. 25
. D& K0 B+ n& E2 ?Appendix A – Standard Resistor and Capacitor Values ................................................................. 26
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pdf 附件如後: 27頁
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" a% S6 T& K7 G( y; S% x' b* O6 x6 h[ 本帖最後由 sjhor 於 2007-5-11 10:12 PM 編輯 ] |
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