Op Amp Power Supply Systems
Walt Jung and Walt Kester
Op amp circuits have traditionally been powered from well-regulated, low noise linear power supplies. This type of power system is typically characterized by medium-to-low power conversion efficiency. Such linear regulators usually excel in terms of self-generated and radiated noise components. If the designer’s life were truly simple, it might continue with such familiar designs offering good performance and minimal side effects.
But, the designer’s life is hardly so simple. Modern systems may allow using linear regulators, but multiple output levels and/or polarities are often required. There may also be some additional requirements set for efficiency, which may dictate the ...
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