A_Single-Supply_Op-Amp_Circuit_Collection: A_Single-Supply_Op-Amp_Circuit_Collection.pdf

1 Introduction .................................................................................................................................. 3
1.1 Split Supply vs Single Supply.................................................................................................... 3
1.2 Virtual Ground.......................................................................................................................... 4
1.3 AC-Coupling ............................................................................................................................. 4
1.4 Combining Op-Amp Stages ...................................................................................................... 5
1.5 Selecting Resistor and Capacitor Values .................................................................................. 5
2 Basic Circuits ............................................................................................................................... 5
2.1 Gain......................................................................................................................................... 5
2.2 Attenuation ............................................................................................................................... 6
2.3 Summing ................................................................................................................................. 9
2.4 Difference Amplifier .................................................................................................................. 9
2.5 Simulated Inductor.................................................................................................................... 9
2.6 Instrumentation Amplifiers ...................................................................................................... 10
3 Filter Circuits ............................................................................................................................... 12
3.1 Single Pole Circuits................................................................................................................. 13
3.1.1 Low Pass Filter Circuits .............................................................................................................13
3.1.2 High Pass Filter Circuits.............................................................................................................13
3.1.3 All-Pass Filter ............................................................................................................................14
3.2 Double-Pole Circuits ............................................................................................................... 15
3.2.1 Sallen-Key................................................................................................................................15
3.2.2 Multiple Feedback (MFB)...........................................................................................................16
3.2.3 Twin T ......................................................................................................................................17
3.2.4 Fliege .......................................................................................................................................20
3.2.5 Akerberg-Mossberg Filter ..........................................................................................................22
3.2.6 BiQuad .....................................................................................................................................24
3.2.7 State Variable...........................................................................................................................25
4 References.................................................................................................................................. 25
Appendix A – Standard Resistor and Capacitor Values ................................................................. 26
Figures
1 Split Supply (L) vs Single Supply (R) Circuits ..................................................................................3
2 Single-Supply Operation at Vcc/2....................................................................................................4
3 AC-Coupled Gain Stages ................................................................................................................6
4 Traditional Inverting Attenuation With an Op Amp ...........................................................................6
5 Inverting Attenuation Circuit ............................................................................................................7
6 Noninverting Attenuation .................................................................................................................8
SLOA058
2 A Single-Supply Op-Amp Circuit Collection
7 Inverting Summing Circuit ...............................................................................................................9
8 Subtracting Circuit..........................................................................................................................9
9 Simulated Inductor Circuit .............................................................................................................10
10 Basic Instrumentation-Amplifier Circuit..........................................................................................11
11 Simulated Instrumentation-Amplifier Circuit...................................................................................11
12 Instrumentation Circuit With Only Two Op Amps...........................................................................12
13 Low-Pass Filter Circuits.................................................................................................................13
14 High-Pass Filter Circuits................................................................................................................14
15 All-Pass Filter Circuit .....................................................................................................................14
16 Sallen-Key Low- and High-Pass Filter Topologies.........................................................................16
17 Multiple-Feedback Topologies.......................................................................................................17
18 Single Op-Amp Twin-T Filter in Band-Pass Configuration .............................................................18
19 Single Op-Amp Twin-T Filter in Notch Configuration .....................................................................18
20 Dual-Op-Amp Twin-T Low-Pass Filter ...........................................................................................19
21 Dual-Op-Amp Twin-T High-Pass Filter ..........................................................................................19
22 Dual-Op-Amp Twin-T Notch Filter .................................................................................................20
23 Low-Pass Fliege Filter...................................................................................................................20
24 High-Pass Fliege Filter ..................................................................................................................21
25 Band-Pass Fliege Filter .................................................................................................................21
26 Notch Fliege Filter .........................................................................................................................22
27 Akerberg-Mossberg Low-Pass Filter .............................................................................................22
28 Akerberg-Mossberg High-Pass Filter.............................................................................................23
29 Akerberg-Mossberg Band-Pass Filter............................................................................................23
30 Akerberg-Mossberg Notch Filter....................................................................................................24
31 Biquad Low-Pass and Band-Pass Filter ........................................................................................24
32 State-Variable Four-Op-Amp Topology .........................................................................................25
Tables
1 Normalization Factors .....................................................................................................................8

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