"The tracking control problem of amplifying converters encompasses an important practical concern and a challenging theoretical problem. These converters are nonlinear, nonminimum phase systems with saturated control and a highly variable parameter (the load). Such characteristics make amplifying converters devices difficult to control, even for the regulation case. Several aspects of the tracking control problem of the boost converter are addressed. A characterisation of the signal the converter is able to follow is given. The relationship between the parameter values and the tracking error is established, and it is shown that adequate parameters for the DC-to-DC converter are not always suitable for DC-to-AC conversion."