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Contents2 e' l9 f; Q; O+ n2 ?
1 Introduction .................................................................................................................................. 3
% H- F( M/ y* s0 G& \+ E1.1 Split Supply vs Single Supply.................................................................................................... 3& i& n4 Q4 T& y: k
1.2 Virtual Ground.......................................................................................................................... 4# w5 S- `8 B' l& ]/ W
1.3 AC-Coupling ............................................................................................................................. 4. f0 C! l6 A- p# E. i: B' |
1.4 Combining Op-Amp Stages ...................................................................................................... 56 l1 F1 h+ w$ Q" J6 O
1.5 Selecting Resistor and Capacitor Values .................................................................................. 5
! m/ F$ h; C/ ?4 h$ R D8 d2 Basic Circuits ............................................................................................................................... 5
( I0 \9 W, J8 Q/ u% z' P2.1 Gain......................................................................................................................................... 51 g: h! \3 k/ A' w. `) y- a
2.2 Attenuation ............................................................................................................................... 6
, J, W+ t* b7 a2.3 Summing ................................................................................................................................. 9- s3 e" T4 d: X( n `
2.4 Difference Amplifier .................................................................................................................. 96 P- u$ F+ ?: ?) Q- a4 D& F P
2.5 Simulated Inductor.................................................................................................................... 9
- w3 {# B0 ~4 v3 \$ @2.6 Instrumentation Amplifiers ...................................................................................................... 10
6 {3 x' K; r5 e, i8 n# x3 Filter Circuits ............................................................................................................................... 12
) F4 L1 h5 C; R8 X% P" G1 q, ?4 i+ l3.1 Single Pole Circuits................................................................................................................. 13$ _0 `+ ^$ q! }9 E# c2 `
3.1.1 Low Pass Filter Circuits .............................................................................................................13
7 [* G3 _8 s9 U1 H5 B7 T3.1.2 High Pass Filter Circuits.............................................................................................................13
2 u0 e4 R1 h# |6 |$ v4 X3.1.3 All-Pass Filter ............................................................................................................................14
4 W* Z' d* t' R) Z* i1 u3.2 Double-Pole Circuits ............................................................................................................... 15! L9 S7 i/ b! R4 i6 q/ ]
3.2.1 Sallen-Key................................................................................................................................15% x% P& C- Z% L
3.2.2 Multiple Feedback (MFB)...........................................................................................................16
6 R3 ^/ k- e+ T5 W3.2.3 Twin T ......................................................................................................................................17* ]) ~# \, D2 J- s3 R: C, n; q
3.2.4 Fliege .......................................................................................................................................20
: j4 q3 H w$ D! r) H' z' e3.2.5 Akerberg-Mossberg Filter ..........................................................................................................22
9 m* D8 @' `, K. R3.2.6 BiQuad .....................................................................................................................................24
S4 z, l) F; F+ }3 ?- p( S1 s/ \0 L: b3.2.7 State Variable...........................................................................................................................25, ~9 j1 q& }6 a5 u# Z3 c" n- }
4 References.................................................................................................................................. 25: o. ~- o+ h) Q& n
Appendix A – Standard Resistor and Capacitor Values ................................................................. 26 D# h' ^% g! v9 r- |: [1 i- M% z
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[ 本帖最後由 sjhor 於 2007-5-11 10:12 PM 編輯 ] |
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