In operation the op amp acts to adjust the output

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Unformatted text preview: amplifier that can supply a large output current. However, we can also describe a regulated supply as a “feedback” system that employs an error amplifier to adjust the output voltage so that it tracks a reference voltage as shown in Fig. 2. Fig. 2. The basic “feedback” regulator The basic regulator, as shown in Fig. 2, consists of an op- amp, a “pass element”, and a reference. The pass element can be though of as a valve, which controls the current flow into the load as a function of its control voltage. The pass element can be a BJT transistor, a MOSFET, or even a vacuum tube. The reference voltage is a precision voltage source which provides a stable, clean voltage but is not, conveniently, required to source any current. In operation, the op- amp acts to adjust th...
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This document was uploaded on 04/02/2014.

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