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Contents
" |( j, X, Q: n3 u! m1 Introduction .................................................................................................................................. 3 ]- ]& w. d4 I0 q3 s
1.1 Split Supply vs Single Supply.................................................................................................... 3
5 _+ C3 I5 X. }* e. U _# {1.2 Virtual Ground.......................................................................................................................... 4
& B# V/ X# b$ J1 B5 q( }1.3 AC-Coupling ............................................................................................................................. 4
: K s% R% K/ M1.4 Combining Op-Amp Stages ...................................................................................................... 5/ f4 _; l6 e8 L( o. C$ E
1.5 Selecting Resistor and Capacitor Values .................................................................................. 5/ ^! ~) R3 l) S, K
2 Basic Circuits ............................................................................................................................... 5
) o$ |, r0 `4 ?% u; v* e4 i/ q, \2.1 Gain......................................................................................................................................... 5
7 y& E2 }3 a8 P1 A2.2 Attenuation ............................................................................................................................... 6
8 ]! H' d0 w) M5 ?2.3 Summing ................................................................................................................................. 9
9 ^# Z' }/ A$ x0 n$ j2.4 Difference Amplifier .................................................................................................................. 90 w) k0 t$ Y: W: q1 ~
2.5 Simulated Inductor.................................................................................................................... 9
( T; B- p+ K6 p( j% O( n( d" Q2.6 Instrumentation Amplifiers ...................................................................................................... 10
, o% x( C' n- H3 Filter Circuits ............................................................................................................................... 12
" i( ]0 f/ Q( n; u" o }* Q3.1 Single Pole Circuits................................................................................................................. 13
8 U- Y, v1 v% G. \1 ^/ |. X/ C3.1.1 Low Pass Filter Circuits .............................................................................................................13
! D( ]1 F- G7 m/ r* g8 f6 ^3.1.2 High Pass Filter Circuits.............................................................................................................135 C* X8 ?% G& v
3.1.3 All-Pass Filter ............................................................................................................................14
7 u' _- B+ t. {7 f6 ^" E, `# I3.2 Double-Pole Circuits ............................................................................................................... 151 E* ?5 Q3 e$ ~3 n, l9 b. z
3.2.1 Sallen-Key................................................................................................................................15
& F; O# |% ^% J; S( X3.2.2 Multiple Feedback (MFB)...........................................................................................................16
' t: x- Z2 o1 D/ o* r# H) P3.2.3 Twin T ......................................................................................................................................17
[, @# ~! C. x3.2.4 Fliege .......................................................................................................................................20/ i$ P; i( R% }9 a
3.2.5 Akerberg-Mossberg Filter ..........................................................................................................22
/ E' g& f% J) _' H3.2.6 BiQuad .....................................................................................................................................243 A+ F0 \% `# X1 A/ m# P0 }8 P4 N
3.2.7 State Variable...........................................................................................................................25' Q, i4 e5 q: v' R) g9 M7 h" a0 M
4 References.................................................................................................................................. 25/ v B4 v$ {" u& X/ e! q( r1 g
Appendix A – Standard Resistor and Capacitor Values ................................................................. 26& Q: x5 \: x2 j0 M2 }: @: z
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4 h* [4 I4 `& F- H7 Updf 附件如後: 27頁7 p' w+ E9 L0 b) l: Q8 w8 c. Y+ p
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[ 本帖最後由 sjhor 於 2007-5-11 10:12 PM 編輯 ] |
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