Gs. Moschytz et A. Carlosena, A CLASSIFICATION OF CURRENT-MODE SINGLE-AMPLIFIER BIQUADS BASED ON A VOLTAGE-TO-CURRENT TRANSFORMATION, IEEE transactions on circuits and systems. 2, Analog and digital signal processing, 41(2), 1994, pp. 151-156
Using a simple and well-known voltage-to-current transformation, curre
nt-mode active RC filters that are amenable to IC realization can be d
erived from their voltage-based counterparts. Using this transformatio
n, a classification of current-based single-amplifier biquads is intro
duced which is derived from a similar voltage-based classification. Th
is classification is exhaustive in that it includes all possible curre
nt-based single-amplifier biquads.