Texas Instruments Corporation

Charles Allen DeVries, Jr

Michael G Amaro

Joseph Gerard Renauer

A power regulator has an output for regulated power that is connected to supply power to a load. The load can have various electrical characteristics, including requiring a rapid transient response. The transient response amplitude for the power regulator is decreased by adding capacitance at the output, but that slows the response time of the power regulator by lowering the crossover frequency and the phase margin at the crossover frequency. An adjustable gain element imbedded in the feedback network provides an input to permit a builder or user of the power regulator to vary the effective value of impedance elements in the feedback network. The builder or user selectively connects an impedance to the input of the adjustable gain element to thereby adjust the frequency characteristics of the feedback network to thereby adjust output characteristics of the power regulator to compensate for the effects of capacitance added to the power regulator output. The selective connection of various impedances to the input in the variable gain element adjusts the gain in the feedback circuit so to change the frequency of the gain and output phase of the regulator. Proper adjustment of the variable gain raises the crossover frequency and the phase margin, restoring the performance that was degraded by the added capacitance at the output.

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Lisle, IL, United States of America

Charles Allen DeVries, Jr