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Engineering LibreTexts

7.1: Theory Overview

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    Series-output feedback connections create controlled current sources. This means that the load current will be constant in spite of changes in load impedance. Two variants are possible. Parallel-input connections create a current-sensing circuit, thus P-S feedback forms a current-controlled current-source, or ideal current amplifier. The current gain is set by the two feedback resistors, \(R_i\) and \(R_f\). Series-input connections create a voltage-sensing circuit, thus S-S feedback forms a voltage-controlled current-source, or voltage-to-current transducer. The transconductance is set by the feedback resistor \(R_i\).

    This page titled 7.1: Theory Overview is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by James M. Fiore via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.