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Contents
0 l: Z4 O4 H/ l' ?) ]! e W0 ^ T1 Introduction .................................................................................................................................. 3
; {( d+ j( w5 Q( V( [1.1 Split Supply vs Single Supply.................................................................................................... 3 O* |# T" g7 b3 T
1.2 Virtual Ground.......................................................................................................................... 4
" W) G% ^) J, e m# o/ y1 k' N7 e1.3 AC-Coupling ............................................................................................................................. 4& K. R) @. J4 n8 d9 T" o8 B/ D/ I
1.4 Combining Op-Amp Stages ...................................................................................................... 58 p4 p0 X5 R$ Q4 D( [8 ~
1.5 Selecting Resistor and Capacitor Values .................................................................................. 5
1 s8 U* x' l7 s; k7 m! \, ~2 Basic Circuits ............................................................................................................................... 5" U' E& E0 L R( z& z4 ]* p: l
2.1 Gain......................................................................................................................................... 5: B) ~. m& v0 m2 Y0 O( |- P
2.2 Attenuation ............................................................................................................................... 60 B2 V" T7 V1 w
2.3 Summing ................................................................................................................................. 9
: P7 E" R* f& e" D/ w; i$ P, Z2.4 Difference Amplifier .................................................................................................................. 96 I) o4 t* z b' k
2.5 Simulated Inductor.................................................................................................................... 9
6 K' _( K& J! ?; ?5 [2.6 Instrumentation Amplifiers ...................................................................................................... 10
" { l4 p) }4 n. U I+ Y' F3 Filter Circuits ............................................................................................................................... 12
2 N# o- `' x+ w3.1 Single Pole Circuits................................................................................................................. 13( Y6 T' P6 q; X+ c/ z a& p
3.1.1 Low Pass Filter Circuits .............................................................................................................130 `& a: w- B% {/ j
3.1.2 High Pass Filter Circuits.............................................................................................................13" s9 D7 G0 `+ F* x1 B# P8 t! p
3.1.3 All-Pass Filter ............................................................................................................................14
( C6 @# p, n2 P9 B" T" N3.2 Double-Pole Circuits ............................................................................................................... 15) H4 R, ]1 g5 }) H: X
3.2.1 Sallen-Key................................................................................................................................15! e# O& h# A! [& W& R
3.2.2 Multiple Feedback (MFB)...........................................................................................................166 v: x# N) t, v% u7 ^+ m. o
3.2.3 Twin T ......................................................................................................................................17: `) s. `3 ~+ q1 e! U* k% N: ?
3.2.4 Fliege .......................................................................................................................................20
" l9 K I! d" A2 A/ A3.2.5 Akerberg-Mossberg Filter ..........................................................................................................22/ p4 f9 |: b2 ~
3.2.6 BiQuad .....................................................................................................................................24# j. W" Y4 p! P' O: ~7 v" q0 b
3.2.7 State Variable...........................................................................................................................25- X8 A9 @) q% F+ n# {
4 References.................................................................................................................................. 257 x1 Y! B' h" `' V; }
Appendix A – Standard Resistor and Capacitor Values ................................................................. 26, c+ Z' i/ z5 i; {
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1 `1 Z, [/ Z& j; `! a: b" q: i. C" Ipdf 附件如後: 27頁5 P7 H- b+ E; V2 D K( }7 j/ C7 H
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[ 本帖最後由 sjhor 於 2007-5-11 10:12 PM 編輯 ] |
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