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Contents
2 j4 F k2 u) v5 H S5 W \1 Introduction .................................................................................................................................. 33 @& |6 r0 Q3 ?8 ^
1.1 Split Supply vs Single Supply.................................................................................................... 3, k# u: v& i8 }0 H3 u
1.2 Virtual Ground.......................................................................................................................... 4) [+ Q- Q: U' i8 ~$ b) t1 l; i
1.3 AC-Coupling ............................................................................................................................. 4; Q. t4 X& t8 l5 `, j; P
1.4 Combining Op-Amp Stages ...................................................................................................... 5
: y" ^/ n: S6 |5 L5 m; H1.5 Selecting Resistor and Capacitor Values .................................................................................. 5
- u2 w7 k% s" G" f. t# _2 Basic Circuits ............................................................................................................................... 5
! g5 V$ W3 u4 k2.1 Gain......................................................................................................................................... 5
. b1 ?# T" ^" b2.2 Attenuation ............................................................................................................................... 6
[% u8 _ J7 k1 P' E2.3 Summing ................................................................................................................................. 9
- |% {2 P2 _3 Y. b, {2 ]9 T, Y# R2.4 Difference Amplifier .................................................................................................................. 9
$ o( b! D2 R8 J h o% d2.5 Simulated Inductor.................................................................................................................... 9% O* q# P- f, C
2.6 Instrumentation Amplifiers ...................................................................................................... 10% |$ x& F, u7 B. g, Z2 C0 ?0 F
3 Filter Circuits ............................................................................................................................... 12. e k# e) r' o% J0 c1 K, i
3.1 Single Pole Circuits................................................................................................................. 13
2 U, ?2 F8 I. O" {/ L3.1.1 Low Pass Filter Circuits .............................................................................................................13
4 A! u1 [- p# L# d7 L4 G3.1.2 High Pass Filter Circuits.............................................................................................................134 P# I. k b3 x* G8 c
3.1.3 All-Pass Filter ............................................................................................................................146 B% x- C1 n* u) ?: M$ I3 g! R! [4 F
3.2 Double-Pole Circuits ............................................................................................................... 15
! P$ Z( B) \! d7 a3.2.1 Sallen-Key................................................................................................................................15' ~) F, F5 X" S( h3 F( j
3.2.2 Multiple Feedback (MFB)...........................................................................................................16
- x _3 j. m, p% Z' _: U0 R0 Q! w3.2.3 Twin T ......................................................................................................................................17
; T, d) s& R }5 r3.2.4 Fliege .......................................................................................................................................20
% l- z2 Y/ w3 v3.2.5 Akerberg-Mossberg Filter ..........................................................................................................22 L8 ~: N5 P8 s: w7 A
3.2.6 BiQuad .....................................................................................................................................24
# w J+ |; C" m# i5 s8 j4 y$ X3.2.7 State Variable...........................................................................................................................259 k- |) t' h# i) ]& j
4 References.................................................................................................................................. 25. p1 \1 h1 A- E# {/ [; a
Appendix A – Standard Resistor and Capacitor Values ................................................................. 26
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[ 本帖最後由 sjhor 於 2007-5-11 10:12 PM 編輯 ] |
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