《A_Single-Supply_Op-Amp_Circuit_Colletion》.pdf

Application Report SLOA058– November 2000 A Single-Supply Op-Amp Circuit Collection Bruce Carter Op-Amp Applications, High Performance Linear Products One of the biggest problems for designers of op-amp circuitry arises when the circuit must be operated from a single supply, rather than 15 V. This application note provides working circuit examples. Contents 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