Op_Amps_sloa058 - Application Report SLOA058 November 2000...

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Unformatted text preview: Application Report SLOA058 November 2000 1 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 ............................................................................................................... 153....
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Op_Amps_sloa058 - Application Report SLOA058 November 2000...

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