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Operational-Amplifier Circuits with Variable Phase Shift and Their Application to High-Q Active RC-Filters and RC-Oscillators
Date Issued
01-01-1976
Author(s)
Reddy, M. A.
Abstract
In high-frequency applications using operational amplifiers, the undesirable phase shift produced by the amplifiers often degrades circuit performance. In this paper, simple operational-amplifier circuit units are described, which can give leading or lagging phase as desired. These units can be used for cancellation of undesired phase in a variety of circuits, thereby improving their high-frequency performance vastly. Examples are given, of the applications of these variable-phase units in RC-oscillators and high-Q active RC-filters. © 1976, IEEE. All rights reserved.
Volume
23