A programmable gain cell is described which operates in a current-steering mode. The technique is shown to offer good linearity and a precisely defined maximum gain which exhibits near zero distortion. The cellular structure is presented together with an application circuit using error feedforward distortion correction within the input stage, while similar techniques realize a precision current mirror but configured using error feedback.

Author: Hawksford, Malcolm J.
Affiliation: University of Essex, Department of Electrical Engineering Science, Colchester, Essex, United Kingdom
JAES Volume 30 Issue 11 pp. 795-799; November 1982
Publication Date: November 1, 1982

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