Yp. Tsividis, EXTERNALLY LINEAR INTEGRATORS, IEEE transactions on circuits and systems. 2, Analog and digital signal processing, 45(9), 1998, pp. 1181-1187
The concepts behind externally linear, internally nonlinear integrator
s are reviewed, and the context in which such integrators can find use
in signal processing is discussed. Several examples of specific cases
are offered, including log-domain, exponential state space, square ro
ot domain, piecewise-linear, and nonlinear capacitance circuits, Sever
al issues requiring caution are discussed.