Effect-oriented modelling of noise in relaxation oscillators

In this paper, a new modelling method is introduced for the description of the influence of noise in relaxation oscillators. Although the noise behaviour of relaxation oscillators is principally difficult to analyse, mainly due to the non-linear character of these oscillators, in this paper a method is presented for describing the influence of noise by using simple filter models that can be interpreted very easily. The presented models are effect-oriented models, rather than a cause-oriented models, which gives the designer the freedom to match the noise model to a specific application.