Difference between revisions of "EEHDSGN Real Operational Amplifier Circuits"
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# Picking an appropriate op amp IC type for the project at hand. | # Picking an appropriate op amp IC type for the project at hand. | ||
# And many others. | # And many others. | ||
=== Requisite Concepts === | |||
Input/output impedance | |||
Single vs dual power supply rails | |||
=== Basic Op Amp Circuits === | === Basic Op Amp Circuits === | ||
| Line 27: | Line 32: | ||
=== Non-ideal op amp behaviors === | === Non-ideal op amp behaviors === | ||
Saturation | |||
Operation close to rails | Operation close to rails | ||
| Line 43: | Line 50: | ||
=== Op amp features === | === Op amp features === | ||
Rail-to-rail input and/or output | Rail-to-rail input and/or output | ||
Single-supply operation | |||
=== Representative modern op amps for common applications === | === Representative modern op amps for common applications === | ||
=== Rugged industrial op amp circuits === | === Rugged industrial op amp circuits === | ||
Revision as of 15:48, 19 February 2022
Introduction
Basic operational amplifier (op amp) circuits are covered to death elsewhere. What is commonly not discussed, however, is that real-world (industrial, rugged) op amp circuits are NOT the basic ones commonly shown everywhere.
Real-World Op Amp Circuit Considerations
Real-world considerations (for an op amp in an industrial / commercial product) include the following:
- Provisions to prevent op amp from oscillation.
- Provisions to include filtering on op am input.
- Provisions to balance op amp input impedances, especially when filtering is employed.
- Picking an appropriate op amp IC type for the project at hand.
- And many others.
Requisite Concepts
Input/output impedance
Single vs dual power supply rails
Basic Op Amp Circuits
It would be useful to start from basic circuits, and immediately observe issues with them:
TODO inverting
TODO its parameters
TODO non-inverting
TODO its parameters
TODO differential
TODO its parameters
Non-ideal op amp behaviors
Saturation
Operation close to rails
Nonlinearities
Bandwidth
Instability
Preventing op amp oscillation
Adding filtering to op amp circuit
Impedance Balancing
Op amp features
Rail-to-rail input and/or output
Single-supply operation
