A non-linear design approach for high-frequency linear integrators

In this paper we will describe a generalised methodology for the implementation of both instantaneous companding integrators and what we have defined as "expressing" integrators, where the signal is first expanded and then compressed. We will show that the linearisation circuitry in some cases is identical to techniques used in Gm linearisation in linear Gm-C integrators. We will also show how these techniques can be applied at the ft of the transistor.