New methods & non-linear measurements for active differential devices

This paper presents new results for nonlinear measurements of active differential devices based on a novel source system. The system provides both true-differential and common-mode stimulus for CW and modulated RF signals, and presents results of non-linear operation of differential devices driven with such signals, which are compared with the same devices driven at the same levels using single ended drive and calculating the differential response. A remarkable result is that the latter method performs very well for devices having common-to-differential isolation.